Log in

Relevant bibliographies by topics / Yukawa force / Journal articles

To see the other types of publications on this topic, follow the link: Yukawa force.

Journal articles on the topic 'Yukawa force'

Author: Grafiati

Published: 4 June 2025

Last updated: 6 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Yukawa force.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

BARUAH, SWATI, and NILAKSHI DAS. "A comparative study between effects of shadowing potential and ODS on Coulomb crystal formation." Journal of Plasma Physics 77, no. 4 (2010): 547–57. http://dx.doi.org/10.1017/s0022377810000723.

Full text

Abstract:

AbstractIn dusty plasma, the overlapping Debye spheres around dust grains produce an attractive force. Shadowing force is exerted between neighboring particles because of mutual distortion of ion or neutral flux to the particles. A comparative study has been made on the role of these two forces on 2D structure of dusty system. Radial distribution function for the particles is a comparative study between the effect of the coupled Yukawa-shadowing potential and the coupled Yukawa-Overlapping Debye Sphere (ODS) potential on 2D dust crystal formation, which has been performed by using molecular dynamics simulation. The structure of the system is investigated by calculating the radial distribution function (g(r)) for different values of Γ, κ and dust number densities nd. It is seen from our study that the Coulomb coupling parameter does not have significant effect on both ODS and shadowing forces. The attractive shadowing force is more dominant for grains with large screening parameter. However, the ODS force becomes dominant with the increasing value of the dust number density. The results for the Yukawa-Shadowing and the ODS potential are also compared with experimental results and a close agreement is obtained for attractive shadowing force.

APA, Harvard, Vancouver, ISO, and other styles

2

BORDAG, M., V. M. MOSTEPANENKO, and I. YU. SOKOLOV. "RESTRICTIONS ON THE HYPOTHETICAL LONG RANGE INTERACTIONS FROM THE CASIMIR-TYPE NULL EXPERIMENT WITH THREE TEST BODIES." Modern Physics Letters A 09, no. 29 (1994): 2671–80. http://dx.doi.org/10.1142/s0217732394002513.

Full text

Abstract:

A realistic null experiment is suggested in which the Casimir force between a plane plate and a spherical lens is compensated by the force of gravitational attraction. This configuration is shown to be very sensitive to the existence of additional hypothetical forces of Yukawa-type or power laws. From the suggested null experiment the restrictions on the Yukawa constant α can be strengthened by a factor up to 1000 in a wide range 10−8 m < λ < 10−4 m and by a factor of 10 for λ from several centimeters to several meters. For power law interactions the strengthening of restrictions by a factor of 20 is possible for the force decreasing as r−5.

APA, Harvard, Vancouver, ISO, and other styles

3

Eingorn, Maxim, Ezgi Canay, Jacob M. Metcalf, Maksym Brilenkov, and Alexander Zhuk. "Effect of the Cubic Torus Topology on Cosmological Perturbations." Universe 7, no. 12 (2021): 469. http://dx.doi.org/10.3390/universe7120469.

Full text

Abstract:

We study the effect of the cubic torus topology of the Universe on scalar cosmological perturbations which define the gravitational potential. We obtain three alternative forms of the solution for both the gravitational potential produced by point-like masses, and the corresponding force. The first solution includes the expansion of delta-functions into Fourier series, exploiting periodic boundary conditions. The second one is composed of summed solutions of the Helmholtz equation for the original mass and its images. Each of these summed solutions is the Yukawa potential. In the third formula, we express the Yukawa potentials via Ewald sums. We show that for the present Universe, both the bare summation of Yukawa potentials and the Yukawa-Ewald sums require smaller numbers of terms to yield the numerical values of the potential and the force up to desired accuracy. Nevertheless, the Yukawa formula is yet preferable owing to its much simpler structure.

APA, Harvard, Vancouver, ISO, and other styles

4

MOSTEPANENKO, V. M. "CONSTRAINTS ON FORCES INSPRIRED BY EXTRA DIMENSIONAL PHYSICS FOLLOWING FROM THE CASIMIR EFFECT." International Journal of Modern Physics A 17, no. 06n07 (2002): 722–31. http://dx.doi.org/10.1142/s0217751x02010054.

Full text

Abstract:

We consider Yukawa-type forces inspired by extra dimensional physics and by exchange of light elementary particles. Constraints on these forces following from the recent measurements of the Casimir force are analysed. We show that the experiments with the Casimir force gave the possibility to strengthen the previously known constraints up to several thousand times in a wide interaction range. Further strengthening is expected in near future.

APA, Harvard, Vancouver, ISO, and other styles

5

Bergé, Joel, Martin Pernot-Borràs, Jean-Philippe Uzan, et al. "MICROSCOPE’s constraint on a short-range fifth force." Classical and Quantum Gravity 39, no. 20 (2022): 204010. http://dx.doi.org/10.1088/1361-6382/abe142.

Full text

Abstract:

Abstract The MICROSCOPE experiment was designed to test the weak equivalence principle in space, by comparing the low-frequency dynamics of cylindrical ‘free-falling’ test masses controlled by electrostatic forces. We use data taken during technical sessions aimed at estimating the electrostatic stiffness of MICROSCOPE’s sensors to constrain a short-range Yukawa deviation from Newtonian gravity. We take advantage of the fact that in the limit of small displacements, the gravitational interaction (both Newtonian and Yukawa-like) between nested cylinders is linear, and thus simply characterised by a stiffness. By measuring the total stiffness of the forces acting on a test mass as it moves, and comparing it with the theoretical electrostatic stiffness (expected to dominate), it is a priori possible to infer constraints on the Yukawa potential parameters. However, we find that measurement uncertainties are dominated by the gold wires used to control the electric charge of the test masses, though their related stiffness is indeed smaller than the expected electrostatic stiffness. Moreover, we find a non-zero unaccounted for stiffness that depends on the instrument’s electric configuration, hinting at the presence of patch-field effects. Added to significant uncertainties on the electrostatic model, they only allow for poor constraints on the Yukawa potential. This is not surprising, as MICROSCOPE was not designed for this measurement, but this analysis is the first step to new experimental searches for non-Newtonian gravity in space.

APA, Harvard, Vancouver, ISO, and other styles

6

MOSTEPANENKO, V. M., V. B. BEZERRA, G. L. KLIMCHITSKAYA, and C. ROMERO. "NEW CONSTRAINTS ON YUKAWA-TYPE INTERACTIONS FROM THE CASIMIR EFFECT." International Journal of Modern Physics: Conference Series 14 (January 2012): 200–214. http://dx.doi.org/10.1142/s2010194512007337.

Full text

Abstract:

Measurements of the Casimir force are used to obtain stronger constraints on the parameters of hypothetical interactions predicted in different unification schemes beyond the Standard Model. We review new strong constraints on the Yukawa-type interactions derived during the last two years from recent experiments on measuring the lateral Casimir force, Casimir force in configurations with corrugated boundaries and the Casimir-Polder force. Specifically, from measurements of the lateral Casimir force compared with the exact theory the strengthening of constraints up to a factor of 24 millions was achieved. We also discuss further possibilities to strengthen constraints on the Yukawa interactions from the Casimir effect.

APA, Harvard, Vancouver, ISO, and other styles

7

MOSTEPANENKO, V. M., V. B. BEZERRA, G. L. KLIMCHITSKAYA, and C. ROMERO. "NEW CONSTRAINTS ON YUKAWA-TYPE INTERACTIONS FROM THE CASIMIR EFFECT." International Journal of Modern Physics A 27, no. 15 (2012): 1260015. http://dx.doi.org/10.1142/s0217751x12600159.

Full text

Abstract:

Measurements of the Casimir force are used to obtain stronger constraints on the parameters of hypothetical interactions predicted in different unification schemes beyond the Standard Model. We review new strong constraints on the Yukawa-type interactions derived during the last two years from recent experiments on measuring the lateral Casimir force, Casimir force in configurations with corrugated boundaries and the Casimir–Polder force. Specifically, from measurements of the lateral Casimir force compared with the exact theory the strengthening of constraints up to a factor of 24 millions was achieved. We also discuss further possibilities to strengthen constraints on the Yukawa interactions from the Casimir effect.

APA, Harvard, Vancouver, ISO, and other styles

8

Banerjee, Avik, and Gautam Bhattacharyya. "Probing the Higgs boson through Yukawa force." Nuclear Physics B 961 (December 2020): 115261. http://dx.doi.org/10.1016/j.nuclphysb.2020.115261.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Klimchitskaya, Galina L., and Vladimir M. Mostepanenko. "How to Strengthen Constraints on Non-Newtonian Gravity from Measuring the Lateral Casimir Force." Universe 9, no. 1 (2023): 34. http://dx.doi.org/10.3390/universe9010034.

Full text

Abstract:

It has been known that in the nanometer interaction range the available experimental data do not exclude the Yukawa-type corrections to Newton’s gravitational law, which exceed the Newtonian gravitational force by many orders of magnitude. The strongest constraints on the parameters of Yukawa-type interaction in this interaction range follow from the experiments on neutron scattering and from measurements of the lateral and normal Casimir forces between corrugated surfaces. In this work, we demonstrate that by optimizing the experimental configuration at the expense of the higher corrugation amplitudes and smaller periods of corrugations it is possible to considerably strengthen the currently available constraints within the wide interaction range from 4.5 to 37 nm. We show that the maximum strengthening by more than a factor of 40 is reachable for the interaction range of 19 nm.

APA, Harvard, Vancouver, ISO, and other styles

10

Klimchitskaya, Galina L., and Vladimir M. Mostepanenko. "Dark Matter Axions, Non-Newtonian Gravity and Constraints on Them from Recent Measurements of the Casimir Force in the Micrometer Separation Range." Universe 7, no. 9 (2021): 343. http://dx.doi.org/10.3390/universe7090343.

Full text

Abstract:

We consider axionlike particles as the most probable constituents of dark matter, the Yukawa-type corrections to Newton’s gravitational law and constraints on their parameters following from astrophysics and different laboratory experiments. After a brief discussion of the results by Prof. Yu. N. Gnedin in this field, we turn our attention to the recent experiment on measuring the differential Casimir force between Au-coated surfaces of a sphere and the top and bottom of rectangular trenches. In this experiment, the Casimir force was measured over an unusually wide separation region from 0.2 to 8μm and compared with the exact theory based on first principles of quantum electrodynamics at nonzero temperature. We use the measure of agreement between experiment and theory to obtain the constraints on the coupling constant of axionlike particles to nucleons and on the interaction strength of a Yukawa-type interaction. The constraints obtained on the axion-to-nucleon coupling constant and on the strength of a Yukawa interaction are stronger by factors of 4 and 24, respectively, than those found previously from gravitational experiments and measurements of the Casimir force but weaker than the constraints following from a differential measurement where the Casimir force was nullified. Some other already performed and planned experiments aimed at searching for axions and non-Newtonian gravity are discussed, and their prospects are evaluated.

APA, Harvard, Vancouver, ISO, and other styles

11

Utsuno, Yutaka. "Probing Different Characteristics of Shell Evolution Driven by Central, Spin-Orbit, and Tensor Forces." Physics 4, no. 1 (2022): 185–201. http://dx.doi.org/10.3390/physics4010014.

Full text

Abstract:

In this paper, the validity of the shell-evolution picture is investigated on the basis of shell-model calculations for the atomic mass number 25≲A≲55 neutron-rich nuclei. For this purpose, the so-called SDPF-MU interaction is used. Its central, two-body spin–orbit, and tensor forces are taken from a simple Gaussian force, the M3Y (Michigan 3-range Yukawa) interaction, and a π+ρ meson exchange force, respectively. Carrying out almost a complete survey of the predicted effective single-particle energies, it is confirmed here that the present scheme is quite effective for describing shell evolution in exotic nuclei.

APA, Harvard, Vancouver, ISO, and other styles

12

Eingorn, Maxim, Andrew McLaughlin, Ezgi Canay, Maksym Brilenkov, and Alexander Zhuk. "Gravitational Interaction in the Chimney Lattice Universe." Universe 7, no. 4 (2021): 101. http://dx.doi.org/10.3390/universe7040101.

Full text

Abstract:

We investigate the influence of the chimney topology T×T×R of the Universe on the gravitational potential and force that are generated by point-like massive bodies. We obtain three distinct expressions for the solutions. One follows from Fourier expansion of delta functions into series using periodicity in two toroidal dimensions. The second one is the summation of solutions of the Helmholtz equation, for a source mass and its infinitely many images, which are in the form of Yukawa potentials. The third alternative solution for the potential is formulated via the Ewald sums method applied to Yukawa-type potentials. We show that, for the present Universe, the formulas involving plain summation of Yukawa potentials are preferable for computational purposes, as they require a smaller number of terms in the series to reach adequate precision.

APA, Harvard, Vancouver, ISO, and other styles

13

Trócsányi, Zoltán. "Super-Weak Force and Neutrino Masses." Symmetry 12, no. 1 (2020): 107. http://dx.doi.org/10.3390/sym12010107.

Full text

Abstract:

We consider an anomaly free extension of the standard model gauge group G SM by an abelian group to G SM ⊗ U ( 1 ) Z . The condition of anomaly cancellation is known to fix the Z-charges of the particles, but two. We fix one remaining charge by allowing for all possible Yukawa interactions of the known left-handed neutrinos and new right-handed ones that obtain their masses through interaction with a new scalar field with spontaneously broken vacuum. We discuss some of the possible consequences of the model.

APA, Harvard, Vancouver, ISO, and other styles

14

KLIMCHITSKAYA, G. L., and U. MOHIDEEN. "CONSTRAINTS ON YUKAWA-TYPE HYPOTHETICAL INTERACTIONS FROM RECENT CASIMIR FORCE MEASUREMENTS." International Journal of Modern Physics A 17, no. 29 (2002): 4143–52. http://dx.doi.org/10.1142/s0217751x02013162.

Full text

Abstract:

Constraints on the Yukawa-type long-range interactions following from the Casimir effect are considered. The constraints obtained from the recent Casimir force measurements by means of a torsion pendulum and an atomic force microscope are collected and compared. New constraints are obtained from the measurement of the lateral Casimir force. The conclusion is made that the Casimir effect has an advantage over the conventional methods in obtaining stronger constraints on hypothetical interactions.

APA, Harvard, Vancouver, ISO, and other styles

15

Idrisi, M. Javed, Teklehaimanot Eshetie, Tenaw Tilahun, and Mitiku Kerebh. "Triangular Equilibria in R3BP under the Consideration of Yukawa Correction to Newtonian Potential." Journal of Applied Mathematics 2022 (June 25, 2022): 1–6. http://dx.doi.org/10.1155/2022/4072418.

Full text

Abstract:

We study the triangular equilibrium points in the framework of Yukawa correction to Newtonian potential in the circular restricted three-body problem. The effects of α and λ on the mean-motion of the primaries and on the existence and stability of triangular equilibrium points are analyzed, where α ∈ − 1 , 1 is the coupling constant of Yukawa force to gravitational force, and λ ∈ 0 , ∞ is the range of Yukawa force. It is observed that as λ ⟶ ∞ , the mean-motion of the primaries n ⟶ 1 + α 1 / 2 and as λ ⟶ 0 , n ⟶ 1 . Further, it is observed that the mean-motion is unity, i.e., n = 1 for α = 0 , n > 1 if α > 0 and n < 1 when α < 0 . The triangular equilibria are not affected by α and λ and remain the same as in the classical case of restricted three-body problem. But, α and λ affect the stability of these triangular equilibria in linear sense. It is found that the triangular equilibria are stable for a critical mass parameter μ c = μ 0 + f α , λ , where μ 0 = 0.0385209 ⋯ is the value of critical mass parameter in the classical case of restricted three-body problem. It is also observed that μ c = μ 0 either for α = 0 or λ = 0.618034 , and the critical mass parameter μ c possesses maximum ( μ c max ) and minimum ( μ c min ) values in the intervals − 1 < α < 0 and 0 < α < 1 , respectively, for λ = 1 / 3 .

APA, Harvard, Vancouver, ISO, and other styles

16

Yokoyama, Shuichi. "Study of gauge gravity duality using flow equation." Impact 2020, no. 5 (2020): 19–21. http://dx.doi.org/10.21820/23987073.2020.5.19.

Full text

Abstract:

There are four elementary forces of nature that describe every interaction in nature: gravity, electromagnetism, the strong force and the weak force. Of these, gravity is the most commonly known and the one that we are most familiar with, but it is still one of the most difficult to explain. Dr Shuichi Yokoyama, from the Yukawa Institute for Theoretical Physics at Kyoto University in Japan, has spent his career studying quantum gravity. Yokoyama is working with a team of researchers, including Dr Tetsuya Onogi and Dr Sinya Aoki, focusing on tackling the problems surrounding our current understanding of gravity by employing modern techniques of theoretical physics, including quantum information and string theory.

APA, Harvard, Vancouver, ISO, and other styles

17

Bsaibes, Thomas, and Ricardo Decca. "Analyzing Power Law Extensions of Newtonian Gravity Using Differential Force Measurements." Metrology 4, no. 2 (2024): 227–39. http://dx.doi.org/10.3390/metrology4020014.

Full text

Abstract:

The Standard Model is not a complete description of reality; it omits the existence of dark matter, dark energy, and an explanation as to why no CP violation has been observed. However, some of these phenomena could be explained through a new force mediated by a new boson. If such a boson were massless it would result in a power law potential and if massive the interaction would be Yukawa-like. A previous experiment employing the interactions of a micromechanical oscillator attached to spherical test mass was successful in placing the best limits on a mass–mass Yukawa-like interaction, but the data were never analyzed in the context of a power law. Here, those data are analyzed considering a power law for powers n = 1–5 where n is the number of boson exchanges. The results show that the limits obtained through power law analysis of these data are not better than the currently accepted limits. A discussion of an experiment design capable of producing better limits on power law extensions to the Standard Model is presented, and suggests that a micromechanical-oscillator-based experiment remains capable of improving the limits by at least one order of magnitude.

APA, Harvard, Vancouver, ISO, and other styles

18

Moniruzzaman, M., and S. B. Faruque. "Estimation of Minimal Length Using Binding Energy of Deuteron." Journal of Scientific Research 10, no. 2 (2018): 99–103. http://dx.doi.org/10.3329/jsr.v10i2.32829.

Full text

Abstract:

We find the shift of ground state energy of deuteron caused by generalized uncertainty principle (GUP) using Yukawa potential as the binding force between the proton and neutron. This leads to an upperbound on minimal length of about 10 -18 m which is close to the values frequently found in literature.

APA, Harvard, Vancouver, ISO, and other styles

19

Idrisi, M. Javed, Sunusi Haruna, and Teklehaimanot Eshetie. "Noncollinear Equilibrium Points in CRTBP with Yukawa-Like Corrections to Newtonian Potential under an Oblate Primary Model." Advances in Astronomy 2023 (June 15, 2023): 1–11. http://dx.doi.org/10.1155/2023/4932794.

Full text

Abstract:

This study is about the effects of Yukawa-like corrections to Newtonian potential on the existence and stability of noncollinear equilibrium points in a circular restricted three-body problem when bigger primary is an oblate spheroid. It is observed that ∂x0/∂λ = 0 = ∂y0/∂λ at λ0 = 1/2, so we have a critical point λ0 = 1/2 at which the maximum and minimum values of x0 and y0 can be obtained, where λ ∈ (0, ∞) is the range of Yukawa force and (x0, y0) are the coordinates of noncollinear equilibrium points. It is found that x0 and y0 are increasing functions in λ in the interval 0 < λ < λ0 and decreasing functions in λ in the interval λ0 < λ < ∞ for all α ∈ α+. On the other hand, x0 and y0 are decreasing functions in λ in the interval 0 < λ < λ0 and increasing functions in λ in the interval λ0 < λ < ∞ for all α ∈ α−, where α ∈ (−1, 1) is the coupling constant of Yukawa force to gravitational force. The noncollinear equilibrium points are found linearly stable for the critical mass parameter β0, and it is noticed that ∂β0/∂λ = 0 at λ ∗ = 1/3; thus, we got another critical point which gives the maximum and minimum values of β0. Also, ∂β0/∂λ > 0 if 0 < λ < λ ∗ and ∂β0/∂λ < 0 if λ ∗ < λ < ∞ for all α ∈ α−, and ∂β0/∂λ < 0 if 0 < λ < λ ∗ and ∂β0/∂λ > 0 if λ ∗ < λ < ∞ for all α ∈ α+. Thus, the local minima for β0 in the interval 0 < λ < λ ∗ can also be obtained.

APA, Harvard, Vancouver, ISO, and other styles

20

Cheng, Hsiao-Bing, Li-Tien Cheng, and Bo Li. "Yukawa-field approximation of electrostatic free energy and dielectric boundary force." Nonlinearity 24, no. 11 (2011): 3215–36. http://dx.doi.org/10.1088/0951-7715/24/11/011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Zhu, Wenqi, C. Reichhardt, C. J. O. Reichhardt, and Yan Feng. "Dynamical commensuration effect in a two-dimensional Yukawa solid modulated by periodic substrates." Physics of Plasmas 30, no. 4 (2023): 043702. http://dx.doi.org/10.1063/5.0143008.

Full text

Abstract:

Transverse depinning dynamics of a periodic-square-substrate modulated two-dimensional dusty plasma solid driven by a constant force in the longitudinal direction are investigated using Langevin dynamical simulations. When the commensuration ratio (the number ratio of particles to substrate potential wells) is increased, there is a nonmonotonic variation of the critical transverse depinning force, and the local maxima and minima of the critical transverse depinning force precisely correspond to the dynamical commensurate and incommensurate conditions, respectively. The dynamical commensuration effect is also clearly visible in the stable one-dimensional channel particle trajectories and the highly ordered structure, while both the particle trajectories and the structure are more disordered under the incommensurate conditions. The nonmonotonic variation of the critical transverse depinning force is attributed to the stability of the lattice structure at specific commensuration ratios.

APA, Harvard, Vancouver, ISO, and other styles

22

Moradi, M., and M. Kavosh Tehrani. "Solvation force in a hard-sphere fluid." Canadian Journal of Physics 77, no. 8 (1999): 585–90. http://dx.doi.org/10.1139/p99-052.

Full text

Abstract:

The solvation force in a hard-sphere fluid is obtained by the denisty functional theory proposed by Rickayzen and Augousti. The direct correlation function (DCF) with the tail introduced by Tang and Lu is used. This DCF (hereafter TL DCF ) is postulated to hold the Yukawa form outside the hard core; and the generalized mean spherical approximation (GMSA) approach has been applied. The results are compared with those obtained by using the Percus-Yevick (PY) DCF. These results are also compared with those of Monte Carlo simulations. At low densities and fairly high densities the results are in agreement. But at high densities there is more oscillation in the solvation force obtained by using TL DCF in comparison with the PY DCF. There are no simulation results at high densities to be compared with these results.PACS No. 61.20

APA, Harvard, Vancouver, ISO, and other styles

23

Tsai, Yu-Dai, Youjia Wu, Sunny Vagnozzi, and Luca Visinelli. "Novel constraints on fifth forces and ultralight dark sector with asteroidal data." Journal of Cosmology and Astroparticle Physics 2023, no. 04 (2023): 031. http://dx.doi.org/10.1088/1475-7516/2023/04/031.

Full text

Abstract:

Abstract We study for the first time the possibility of probing long-range fifth forces utilizing asteroid astrometric data, via the fifth force-induced orbital precession. We examine nine Near-Earth Object (NEO) asteroids whose orbital trajectories are accurately determined via optical and radar astrometry. Focusing on a Yukawa-type potential mediated by a new gauge field (dark photon) or a baryon-coupled scalar, we estimate the sensitivity reach for the fifth force coupling strength and mediator mass in the mass range m ≃ (10-21-10-15) eV, near the “fuzzy” dark matter region. Our estimated sensitivity is comparable to leading limits from equivalence principle tests, potentially exceeding these in a specific mass range. The fifth force-induced precession increases with the orbital semi-major axis in the small m limit, motivating the study of objects further away from the Sun. We also demonstrate that precession tests are particularly strong in probing long-range forces which approximately conserve the equivalence principle. We discuss future prospects for extending our study to more than a million asteroids, including NEOs, main-belt asteroids, Hildas, and Jupiter Trojans, as well as trans-Neptunian objects and exoplanets.

APA, Harvard, Vancouver, ISO, and other styles

24

Sastri, O. S. K. S., Aditi Sharma, Swapna Gora, and Richa Sharma. "Comparative Analysis of Woods-Saxon and Yukawa Model Nuclear Potentials." Journal of Nuclear Physics, Material Sciences, Radiation and Applications 9, no. 1 (2021): 73–79. http://dx.doi.org/10.15415/jnp.2021.91013.

Full text

Abstract:

In this paper, we model the nuclear potential using Woods-Saxon and Yukawa interaction as the mean field in which each nucleon experiences a central force due to rest of the nucleons. The single particle energy states are obtained by solving the time independent Schrodinger wave equation using matrix diagonalization method with infinite spherical well wave-functions as the basis. The best fit model parameters are obtained by using variational Monte-Carlo algorithm wherein the relative mean-squared error, christened as chi-squared value, is minimized. The universal parameters obtained using Woods-Saxon potential are found to be matched with literature reported data resulting a chi-square value of 0.066 for neutron states and 0.069 for proton states whereas the chi-square value comes out to be 1.98 and 1.57 for neutron and proton states respectively by considering Yukawa potential. To further assess the performance of both the interaction potentials, the model parameters have been optimized for three different groups, light nuclei up to 16O - 56Ni, heavy nuclei 100Sn - 208Pb and all nuclei 16O - 208Pb. It is observed that Yukawa model performed reasonably well for light nuclei but did not give satisfactory results for the other two groups while Woods-Saxon potential gives satisfactory results for all magic nuclei across the periodic table.

APA, Harvard, Vancouver, ISO, and other styles

25

Pesnell, W. Dean. "Pulsations of Eötvös Spheres." International Astronomical Union Colloquium 111 (1989): 282. http://dx.doi.org/10.1017/s0252921100011908.

Full text

Abstract:

AbstractA derivation of Eötvös spheres and their pulsations is presented. These spheres incorporate a short range force in their gravitational potential. We used a Yukawa formulation to agree with other workers in this field, although a slightly different form would guarantee a gravitational force that is always attractive. Various relationships are obeyed by these obejcts, much like the polytropes to which they are similar. An attempt is made to test whether a short range force can resolve two outstanding problems in astrophysics. These are the Cepheid mass discrepancy and the frequencies of high-order solar p-modes. The disagreement in predicted and observed Cepheid masses cannot be explained by a repulsive force, but the solar p-modes have their asympotoic frequency decreased. Linear fits to sequences of models are presented for the radial eigenfrequencies and asymptotic frequencies for nonradial pulsations.

APA, Harvard, Vancouver, ISO, and other styles

26

Charan, Harish, Rajaraman Ganesh, and Ashwin Joy. "Molecular dynamics of Yukawa liquids in gravitation: Equilibrium, Instability and Transport." Journal of Plasma Physics 80, no. 6 (2014): 895–917. http://dx.doi.org/10.1017/s0022377814000865.

Full text

Abstract:

Using 2D molecular dynamics (MD) simulation, the equilibrium and dynamical properties of a gravitationally equilibrated Yukawa liquid are investigated. We observe that due to asymmetry introduced in one direction by gravity, several interesting features arise. For example, for a given value of coupling parameter Γ, screening parameter κ and according to a chosen value of gravitational force g (say in y-direction), the system is seen to exhibit super-, sub- or normal diffusion. Interestingly, x-averaged density profiles, unlike a barotropic fluid, acquire sharp, free surface with scale free linear y-dependence. As can be expected for a system with macroscopic gradients, self-diffusion calculated from Green–Kubo's (GK) formalism does not agree with that obtained from Einstein–Smoluchowski (ES) diffusion. A 2D-angular radial pair correlation function g(r, θ) clearly indicates asymmetric features induced by gravity. We observe that due to compression in y-direction, though in liquid state for all values of gravity considered, the transverse mode is found to be predominant as compared to the longitudinal mode, leading to a novel Anisotropic Solid-like Yukawa liquid (ASYL). In in-homogenous Yukawa liquids studied here, Mach cones are found to be asymmetric. When density gradient direction is set in the direction opposite to gravity, the equilibrium is shown to be unstable to Rayleigh–Taylor (RT) instabilities resulting in transport.

APA, Harvard, Vancouver, ISO, and other styles

27

Krappe, Hans J. "Evaluation of the self‐energy of a droplet interacting via a Yukawa force." Journal of Mathematical Physics 26, no. 9 (1985): 2138–40. http://dx.doi.org/10.1063/1.526836.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

MOSTEPANENKO, V. M. "EXPERIMENTAL STATUS OF CORRECTIONS TO NEWTONIAN GRAVITATION INSPIRED BY EXTRA DIMENSIONS." International Journal of Modern Physics A 17, no. 29 (2002): 4307–16. http://dx.doi.org/10.1142/s0217751x02013356.

Full text

Abstract:

Corrections to Newtonian gravitation inspired by the extra dimensional physics and by the exchange of light and massless elementary particles between the atoms of two macrobodies are considered. These corrections can be described by the potentials of Yukawa-type and by the power-type potentials with different powers. The strongest up to date constraints on the corrections to Newtonian gravitation are collected following from the Eötvos- and Cavendish-type experiments and also from the measurements of the Casimir and van der Waals force.

APA, Harvard, Vancouver, ISO, and other styles

29

BERBENTE, CORNELIU, SORIN BERBENTE, and MARIUS BREBENEL. "A possible way to unify the electrostatic (Coulomb) and nuclear (Yukawa) interactions by using a hydrodynamic analogy." Journal of Engineering Sciences and Innovation 7, no. 3 (2022): 387–92. http://dx.doi.org/10.56958/jesi.2022.7.3.387.

Full text

Abstract:

In a previous paper [3] we have used the hydrodynamic analogy to give a model for gravity. A carrying particle named HD-graviton was introduced. In another paper [8], a hydrodynamic analog permitted to unify the theory to include the Coulomb force using so called “vortex masses” having as hydrodynamical correspondent the vortices. In this paper we will give a hydrodynamic interpretation to the YUKAWA (nuclear) interaction. We remember that the hydrodynamical analog for the electrical charges are the vortices.

APA, Harvard, Vancouver, ISO, and other styles

30

Gresham, Moira I., Vincent S. H. Lee, and Kathryn M. Zurek. "Astrophysical observations of a dark matter-Baryon fifth force." Journal of Cosmology and Astroparticle Physics 2023, no. 02 (2023): 048. http://dx.doi.org/10.1088/1475-7516/2023/02/048.

Full text

Abstract:

Abstract We consider the effects of an attractive, long-range Yukawa interaction between baryons and dark matter (DM), focusing in particular on temperature and pulsar timing observations of neutron stars (NSs). We show that such a fifth force, with strength modestly stronger than gravity at ranges greater than tens of kilometers (corresponding to mediator masses less than 10-11eV), can dramatically enhance dark matter kinetic heating, capture, and pulsar timing Doppler shifts relative to gravity plus short range interactions alone. Using the coldest observed NS and pulsar timing array (PTA) data, we derive limits on fifth force strength over a DM mass range spanning light dark matter up to order solar mass composite DM objects. We also consider an indirect limit by combining bullet cluster limits on the DM self-interaction with weak equivalence principle test limits on baryonic self-interactions. We find the combined indirect limits are moderately stronger than kinetic heating and PTA limits, except when considering a DM subcomponent.

APA, Harvard, Vancouver, ISO, and other styles

31

NERLO-POMORSKA, B., K. POMORSKI, and A. DOBROWOLSKI. "ROTATIONAL STATES IN HEAVIEST ISOTOPES." International Journal of Modern Physics E 20, no. 02 (2011): 539–45. http://dx.doi.org/10.1142/s0218301311017971.

Full text

Abstract:

Masses and rotational energies of even-even Fm - Hs isotopes are obtained using the Yukawa-folded single-particle potential and the Lublin Strasbourg Drop . The Strutinsky shell-correction method and the BCS approximation were used to evaluate the shell and pairing corrections. The paring force strength is adjusted to the experimental rotational states of the considered nuclei. The ground-state masses and the lowest rotational states obtained by using the cranking moments of inertia at the equilibrium deformations agree well with the experimental data.

APA, Harvard, Vancouver, ISO, and other styles

32

Oryu, Shinsho. "Generation of long- and short-range potentials from atom-molecules to quark-gluon systems by the GPT potential." Journal of Physics Communications 6, no. 1 (2022): 015009. http://dx.doi.org/10.1088/2399-6528/ac40a3.

Full text

Abstract:

Abstract The general particle transfer (GPT) potential generates not only the Yukawa-type potential but also the 1/r n -type potential in the hadron system, where the mass dependence of the transferred (exchanged) particle is clarified. The GPT potential from the atom-molecule system to the quark-gluon system was studied, where pico-meter physics could be highlighted. It is demonstrated that the long-range three-body Efimov potential is connected with the short-range three-body force potential by the GPT potential. Some applications for historical few-body problems in physics are summarized.

APA, Harvard, Vancouver, ISO, and other styles

33

Bordag, M., G. T. Gillies, and V. M. Mostepanenko. "New constraints on the Yukawa-type hypothetical interaction from the recent Casimir force measurement." Physical Review D 56, no. 1 (1997): R6—R10. http://dx.doi.org/10.1103/physrevd.56.r6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Tang, Rongxin, Xin Qian, and Xiangyu Yu. "On virtual-force algorithms for coverage-optimal node deployment in mobile sensor networks via the two-dimensional Yukawa crystal." International Journal of Distributed Sensor Networks 15, no. 9 (2019): 155014771986488. http://dx.doi.org/10.1177/1550147719864888.

Full text

Abstract:

As theoretical proof has shown that a hexagonal topology can obtain maximal coverage with a fixed number of sensor nodes, node deployment for mobile sensor networks has the objective of forming a hexagonal network topology while consuming minimum energy. Using virtual-force algorithms to move initially randomly distributed nodes into a target topology is one of the widely studied methods for achieving this goal. In this work, a novel virtual-force algorithm based on physical laws in a dusty plasma system (i.e. VFA-DP) was applied within a mobile sensor network deployment scenario. The VFA-DP force has a central attracting force which can provide a screening effect via exponential decay. Here, to evaluate how perfect the final grids become from virtual-force algorithms, we introduce a performance metric based on the pair correlation function in a crystalline structure. Via simulation studies, we determined that the topology resulting from the VFA-DP is much closer to a hexagon. The analysis also indicated that the VFA-DP converges faster than another virtual-force algorithm based on the Lennard-Jones potential (VFA-LJ), resulting in lower communication-related energy costs in real deployment scenarios. The method developed in this article is derived from studies of crystalline structure from condensed matter physics and shows clear evidence of when the regular lattice is ready. It will provide some guidance for engineering by aiding deployment in complex geometric areas or those recovering from disaster.

APA, Harvard, Vancouver, ISO, and other styles

35

Barghout, Kamal. "Analysis of repulsive central universal force field on solar and galactic dynamics." Open Physics 17, no. 1 (2019): 364–72. http://dx.doi.org/10.1515/phys-2019-0041.

Full text

Abstract:

AbstractRecent astrophysical observations hint toward the need for an extended theory of gravity to explain puzzles presented by the standard cosmological model such as the need for dark matter and dark energy to understand the dynamics of the cosmos. This paper investigates the effect of a repulsive central universal force field on the behavior of celestial objects. Negative tidal effect on the solar and galactic orbits, like that experienced by Pioneer spacecrafts, was derived from the central force and was shown to manifest itself as dark matter and dark energy. Vertical oscillation of the sun about the galactic plane was modeled as simple harmonic motion driven by the repulsive force. The proposed universal field was used to infer the shape of dark matter halos as generated from a planar component of the universal force and to explain galactic warp, galactic halo density, and galactic rotation curves. It was found that the repulsive field addition to Newton’s gravity mimics the Yukawa potential correction employed by many current gravitational theories that modify gravity.

APA, Harvard, Vancouver, ISO, and other styles

36

Capolupo, Antonio, Gaetano Lambiase, and Antonio Tedesco. "The periastron advance in curvature based Extended Gravity and Dark Energy." Journal of Physics: Conference Series 2533, no. 1 (2023): 012033. http://dx.doi.org/10.1088/1742-6596/2533/1/012033.

Full text

Abstract:

Abstract In the context of the periastron advance as a fundamental test for gravity theories, we show an approach to deduce constraints on the sizes of the new forces arising in the weak field limit of the Extended Theories of Gravity (ETG). It is also studied the force motivated by Quintessence Fields deforming the Schwarzschild geometry and associated to the Dark Energy, responsible of the acceleration of the Universe. As for the ETG, we consider the more general Scalar-Tensor Fourth Order Gravity (STFOG) and the NonCommutative Spectral Gravity (NCSG) as a special case. The solutions of the linearized field equations provide corrections to the Newtonian potential in the Yukawa-like form V ( r ) = α e − β r r , where α is the parameter related to the strength of the potential and β to the range of the force. Quintessence Fields lead to a power-law correction with parameters related to the Dark Energy. By analysing the periastron advance with the use of the current data, we find improvements on the parameters of the gravitational models as well as on the bounds of the parameter β by several orders of magnitude.

APA, Harvard, Vancouver, ISO, and other styles

37

Faizal, Mir, and Hrishikesh Patel. "Probing short distance gravity using temporal lensing." International Journal of Modern Physics A 36, no. 17 (2021): 2150115. http://dx.doi.org/10.1142/s0217751x21501153.

Full text

Abstract:

It is known that probing gravity in the submillimeter–micrometer range is difficult due to the relative weakness of the gravitational force. We intend to overcome this challenge by using extreme temporal precision to monitor transient events in a gravitational field. We propose a compressed ultrafast photography system called T-CUP to serve this purpose. We show that the T-CUP’s precision of 10 trillion frames per second can allow us to better resolve gravity at short distances. We also show the feasibility of the setup in measuring Yukawa and power-law corrections to gravity which have substantial theoretical motivation.

APA, Harvard, Vancouver, ISO, and other styles

38

NERLO-POMORSKA, B., K. POMORSKI, and J. BARTEL. "DYNAMICAL COUPLING OF ROTATION WITH THE PAIRING FIELD IN HEAVY NUCLEI." International Journal of Modern Physics E 21, no. 05 (2012): 1250050. http://dx.doi.org/10.1142/s0218301312500504.

Full text

Abstract:

The macroscopic–microscopic model with the Lublin–Strasbourg Drop, the Yukawa–folded single-particle potential and a monopole pairing force is used together with the cranking model to describe rotational bands in even–even actinide ( Ra – Cn ) isotopes. The pairing strength is adjusted for every nucleus to reproduce the experimentally known energy of the rotational 2+ state. The average pairing strength obtained in this way is used to predict the rotational states in superheavy No – Cn nuclei. A simple mechanism which takes into account a dynamical coupling of rotation with the pairing field is explained in detail.

APA, Harvard, Vancouver, ISO, and other styles

39

BEKDA, A., M. DJEBLI, and N. BELDJOUDI. "Monte Carlo simulation in a strongly coupled linear chain." Journal of Plasma Physics 74, no. 5 (2008): 629–38. http://dx.doi.org/10.1017/s0022377808007162.

Full text

Abstract:

AbstractMonte Carlo simulation is conducted for a strongly coupled one-dimensional confined-particles system. We deal with an infinite chain of positively charged dust particles. The particles interact through the Yukawa screened potential. It is found that a critical value exists for the number of closest neighbors that are involved in the interaction. The inter-particle distance at equilibrium is found. Using these results, we study the dust-acoustic as well as the dust-lattice modes for two situations. In the first we neglect the friction force while in the second situation the presence of an ambient gas in plasma is considered.

APA, Harvard, Vancouver, ISO, and other styles

40

Chigodaev, Alexander, and Jurij W. Darewych. "Particle–antiparticle potential in scalar quantum field theory with a Higgs-like mediating field." Canadian Journal of Physics 91, no. 10 (2013): 764–69. http://dx.doi.org/10.1139/cjp-2012-0515.

Full text

Abstract:

We study the particle–antiparticle force in a model scalar quantum field theory (QFT) with a nonlinear Higgs-like mediating field. We use the variational method in a reformulated Hamiltonian formalism of the theory. The trial state consists of a superposition of single-pair and two-pair Fock states. Coupled relativistic integral equations for the one- and two-pair channel functions are derived and their nonrelativistic limit forms are obtained. Variational ansatz are used to derive the correction to the dominant Yukawa interparticle potential for the particle–antiparticle system. The correction is found to be an attractive short-range potential.

APA, Harvard, Vancouver, ISO, and other styles

41

Khrapak, S. A., A. V. Ivlev, G. E. Morfill, S. K. Zhdanov, and H. M. Thomas. "Scattering in the Attractive Yukawa Potential: Application to the Ion-Drag Force in Complex Plasmas." IEEE Transactions on Plasma Science 32, no. 2 (2004): 555–60. http://dx.doi.org/10.1109/tps.2004.826073.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Mostepanenko, Vladimir M., and Galina L. Klimchitskaya. "The State of the Art in Constraining Axion-to-Nucleon Coupling and Non-Newtonian Gravity from Laboratory Experiments." Universe 6, no. 9 (2020): 147. http://dx.doi.org/10.3390/universe6090147.

Full text

Abstract:

Constraints on the Yukawa-type corrections to Newton’s gravitational law and on the coupling constant of axionlike particles to nucleons obtained from different laboratory experiments are reviewed and compared. The constraints on non-Newtonian gravity under discussion cover the wide interaction range from nanometers to millimeters and follow from the experiments on neutron scattering, measuring the Casimir force and Cavendish-type experiments. The constraints on the axion-to-nucleon coupling constant following from the magnetometer measurements, Cavendish-type experiments, Casimir physics, and experiments with beams of molecular hydrogen are considered, which refer to the region of axion masses from 10−10 to 200 eV. Particular attention is given to the recent constraints obtained from measuring the Casimir force at nanometer separation distance between the test bodies. Several proposed experiments focussed on constraining the non-Newtonian gravity, axionlike particles and other hypothetical weakly interacting particles, such as chameleons and symmetrons, are discussed.

APA, Harvard, Vancouver, ISO, and other styles

43

Bsaibes, Thomas, Luís Pires, David Czaplewski, Daniel López, and Ricardo S. Decca. "Toward a better system for short range precision force measurements." Modern Physics Letters A 35, no. 03 (2020): 2040002. http://dx.doi.org/10.1142/s0217732320400027.

Full text

Abstract:

Many precision experiments have been done in the Casimir regime and in short range gravity when the separation between the interacting bodies is in the sub-micron range. Experimental complexity is minimized when one of the bodies is a sphere and the other one is a plate, making the alignment between the two bodies ubiquitous. Our group has produced the most precise Casimir measurements, and the best limits on predicted Yukawa-like potentials by measuring a force between a [Formula: see text] sphere attached to a [Formula: see text] micro-mechanical oscillator and a planar source mass. By replacing the spherical surface with a fraction of a [Formula: see text] long cylinder with [Formula: see text]m, the force sensitivity can be greatly enhanced. Here, it is paramount to know the angular deviation between the long axis of the cylinder and both the axis of rotation of the oscillator and the plate. Tests between a cylinder and a structure etched into a silicon wafer show that deviations of [Formula: see text]rad are readily accessible. Additionally, a scaled up experiment is used to investigate if capacitance measurements can determine the orientation of the cylinder with respect to a plane with the required precision.

APA, Harvard, Vancouver, ISO, and other styles

44

Andrews, Bartholomew, and Gareth Conduit. "Absence of diagonal force constants in cubic Coulomb crystals." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 476, no. 2244 (2020): 20200518. http://dx.doi.org/10.1098/rspa.2020.0518.

Full text

Abstract:

The quasi-harmonic model proposes that a crystal can be modelled as atoms connected by springs. We demonstrate how this viewpoint can be misleading: a simple application of Gauss’s law shows that the ion–ion potential for a cubic Coulomb system can have no diagonal harmonic contribution and so cannot necessarily be modelled by springs. We investigate the repercussions of this observation by examining three illustrative regimes: the bare ionic, density tight-binding and density nearly-free electron models. For the bare ionic model, we demonstrate the zero elements in the force constants matrix and explain this phenomenon as a natural consequence of Poisson’s law. In the density tight-binding model, we confirm that the inclusion of localized electrons stabilizes all major crystal structures at harmonic order and we construct a phase diagram of preferred structures with respect to core and valence electron radii. In the density nearly-free electron model, we verify that the inclusion of delocalized electrons, in the form of a background jellium, is enough to counterbalance the diagonal force constants matrix from the ion–ion potential in all cases and we show that a first-order perturbation to the jellium does not have a destabilizing effect. We discuss our results in connection to Wigner crystals in condensed matter, Yukawa crystals in plasma physics, as well as the elemental solids.

APA, Harvard, Vancouver, ISO, and other styles

45

Dzhumagulova, Karlygash N., Ranna U. Masheyeva, and Tlekkabul S. Ramazanov. "Effect of magnetic field and friction force on the velocity autocorrelation in two-dimensional Yukawa liquids." Contributions to Plasma Physics 59, no. 6 (2019): e201800169. http://dx.doi.org/10.1002/ctpp.201800169.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Kärkkäinen, Timo J., and Zoltán Trócsányi. "Nonstandard interactions and sterile neutrinos in super-weak U(1) extension of the standard model." Journal of Physics G: Nuclear and Particle Physics 49, no. 4 (2022): 045004. http://dx.doi.org/10.1088/1361-6471/ac5575.

Full text

Abstract:

Abstract The super-weak force is a minimal, anomaly-free U(1) extension of the standard model (SM), designed to explain the origin of (i) neutrino masses and mixing matrix elements, (ii) dark matter, (iii) cosmic inflation, (iv) stabilization of the electroweak vacuum and (v) leptogenesis. We discuss the neutrino sector of this model in detail and study the allowed parameter space of the neutrino Yukawa matrices and mixing matrix elements. The model generates nonstandard neutrino interactions, whose allowed experimental limits are used to constrain the parameter space of the model. We provide benchmark points in the relevant parameter space that fall within the sensitivity region of the SHiP and MATHUSLA experiments.

APA, Harvard, Vancouver, ISO, and other styles

47

Harikumar, Sreekanth. "Moffat MOdified Gravity (MOG)." Universe 8, no. 5 (2022): 259. http://dx.doi.org/10.3390/universe8050259.

Full text

Abstract:

Scalar Tensor Vector Gravity (STVG) or MOdified Gravity (MOG) is a metric theory of gravity with dynamical scalar fields and a massive vector field introduced in addition to the metric tensor. In the weak field approximation, MOG modifies the Newtonian acceleration with a Yukawa-like repulsive term due to a Maxwell–Proca type Lagrangian. This associates matter with a fifth force and a modified equation of motion. MOG has been successful in explaining galaxy rotation curves, cosmological observations and all other solar system observations without the need for dark matter. In this article, we discuss the key concepts of MOG theory. Then, we discuss existing observational bounds on MOG weak field parameters. In particular, we will present our original results obtained from the X-COP sample of galaxy clusters.

APA, Harvard, Vancouver, ISO, and other styles

48

Harikumar, Sreekanth. "Moffat MOdified Gravity (MOG)." Universe 8, no. 5 (2022): 259. http://dx.doi.org/10.3390/universe8050259.

Full text

Abstract:

Scalar Tensor Vector Gravity (STVG) or MOdified Gravity (MOG) is a metric theory of gravity with dynamical scalar fields and a massive vector field introduced in addition to the metric tensor. In the weak field approximation, MOG modifies the Newtonian acceleration with a Yukawa-like repulsive term due to a Maxwell–Proca type Lagrangian. This associates matter with a fifth force and a modified equation of motion. MOG has been successful in explaining galaxy rotation curves, cosmological observations and all other solar system observations without the need for dark matter. In this article, we discuss the key concepts of MOG theory. Then, we discuss existing observational bounds on MOG weak field parameters. In particular, we will present our original results obtained from the X-COP sample of galaxy clusters.

APA, Harvard, Vancouver, ISO, and other styles

49

Klimchitskaya, Galina, Vladimir Mostepanenko, René Sedmik, and Hartmut Abele. "Prospects for Searching Thermal Effects, Non-Newtonian Gravity and Axion-Like Particles: Cannex Test of the Quantum Vacuum." Symmetry 11, no. 3 (2019): 407. http://dx.doi.org/10.3390/sym11030407.

Full text

Abstract:

We consider the Cannex (Casimir And Non-Newtonian force EXperiment) test of the quantum vacuum intended for measuring the gradient of the Casimir pressure between two flat parallel plates at large separations and constraining parameters of the chameleon model of dark energy in cosmology. A modification of the measurement scheme is proposed that allows simultaneous measurements of both the Casimir pressure and its gradient in one experiment. It is shown that with several improvements the Cannex test will be capable to strengthen the constraints on the parameters of the Yukawa-type interaction by up to an order of magnitude over a wide interaction range. The constraints on the coupling constants between nucleons and axion-like particles, which are considered as the most probable constituents of dark matter, could also be strengthened over a region of axion masses from 1 to 100 meV.

APA, Harvard, Vancouver, ISO, and other styles

50

Pomorski, K., B. Nerlo-Pomorska, J. Bartel, and C. Schmitt. "Fission fragment mass and total kinetic energy distributions of spontaneously fissioning plutonium isotopes." EPJ Web of Conferences 169 (2018): 00016. http://dx.doi.org/10.1051/epjconf/201816900016.

Full text

Abstract:

The fission-fragment mass and total kinetic energy (TKE) distributions are evaluated in a quantum mechanical framework using elongation, mass asymmetry, neck degree of freedom as the relevant collective parameters in the Fourier shape parametrization recently developed by us. The potential energy surfaces (PES) are calculated within the macroscopic-microscopic model based on the Lublin-Strasbourg Drop (LSD), the Yukawa-folded (YF) single-particle potential and a monopole pairing force. The PES are presented and analysed in detail for even-even Plutonium isotopes with A = 236–246. They reveal deep asymmetric valleys. The fission-fragment mass and TKE distributions are obtained from the ground state of a collective Hamiltonian computed within the Born-Oppenheimer approximation, in the WKB approach by introducing a neck-dependent fission probability. The calculated mass and total kinetic energy distributions are found in good agreement with the data.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!