Log in

Relevant bibliographies by topics / MHV scattering amplitudes / Journal articles

To see the other types of publications on this topic, follow the link: MHV scattering amplitudes.

Journal articles on the topic 'MHV scattering amplitudes'

Author: Grafiati

Published: 9 March 2023

Last updated: 10 March 2023

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 'MHV scattering amplitudes.'

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

Wu, Jun-Bao, and Chuan-Jie Zhu. "MHV Vertices and Scattering Amplitudes in Gauge Theory." Journal of High Energy Physics 2004, no. 07 (2004): 032. http://dx.doi.org/10.1088/1126-6708/2004/07/032.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

ANTONIADIS, IGNATIOS, and GEORGE SAVVIDY. "CONFORMAL INVARIANCE OF TENSOR BOSON TREE AMPLITUDES." Modern Physics Letters A 27, no. 18 (2012): 1250103. http://dx.doi.org/10.1142/s0217732312501039.

Full text

Abstract:

The BCFW recursion relation allows to find out the tree-level scattering amplitudes for gluons and tensor gauge bosons in generalized Yang–Mills theory. We demonstrate that the corresponding MHV amplitudes for the tensor gauge bosons of spin-s and n gluons are invariant under conformal group of transformations. This is highly unexpected result for the higher-spin particles, in particular this is not true for the scattering amplitudes of gravitons. We discuss and compare the tree-level scattering amplitudes for the charged tensor bosons with the corresponding scattering amplitudes for gravitons

APA, Harvard, Vancouver, ISO, and other styles

3

GEORGIOU, GEORGE, and GEORGE SAVVIDY. "PRODUCTION OF NON-ABELIAN TENSOR GAUGE BOSONS TREE AMPLITUDES AND BCFW RECURSION RELATION." International Journal of Modern Physics A 26, no. 15 (2011): 2537–55. http://dx.doi.org/10.1142/s0217751x1105350x.

Full text

Abstract:

The BCFW recursion relation is used to calculate tree-level scattering amplitudes in generalized Yang–Mills theory and, in particular, four-particle amplitudes for the production rate of non-Abelian tensor gauge bosons of arbitrary high spin in the fusion of two gluons. The consistency of the calculations in different kinematical channels is fulfilled when all dimensionless cubic coupling constants between vector bosons and high spin non-Abelian tensor gauge bosons are equal to the Yang–Mills coupling constant. We derive a generalization of the Parke–Taylor formula in the case of production of

APA, Harvard, Vancouver, ISO, and other styles

4

Wu, Jun-Bao, and Chuan-Jie Zhu. "MHV Vertices and Fermionic Scattering Amplitudes in Gauge Theory with Quarks and Gluinos." Journal of High Energy Physics 2004, no. 09 (2004): 063. http://dx.doi.org/10.1088/1126-6708/2004/09/063.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

KIM, YONG JOO, and MOON HOE CHA. "COULOMB-MODIFIED EIKONAL MODEL ANALYSIS OF REFRACTIVE12C+12CELASTIC SCATTERING AT Elab= 240 AND 360MeV." International Journal of Modern Physics E 11, no. 03 (2002): 211–19. http://dx.doi.org/10.1142/s0218301302000764.

Full text

Abstract:

We present the Coulomb-modified eikonal model by using a tangential velocity at the distance of closest approach. The Fraunhöfer oscillations observed in the elastic angular distributions of the12C +12C system at Elab= 240 and 360 MeV can be explained due to the strong interference between the near- and far-side scattering amplitudes. We have found that the strongly real and weakly imaginary potentials are required to describe the refractive12C +12C elastic scatterings at Elab= 240 and 360 MeV. The refractive pattern, dominated by the far-side component of the scattering amplitude, can be show

APA, Harvard, Vancouver, ISO, and other styles

6

YAHYA, G. A. "DEFORMED OPTICAL POTENTIAL ANALYSES FOR P+12C." International Journal of Modern Physics E 13, no. 04 (2004): 851–66. http://dx.doi.org/10.1142/s0218301304002508.

Full text

Abstract:

The high energy single folding optical potential approximation is studied to calculate the differential cross-section for proton elastic scattering of 12 C at 156 MeV and 1440 MeV and 12 C for state 2+ (4.44 MeV) at 1440 MeV. A Gaussian nuclear density distribution was used for the proton and Gaussian and Brink nuclear density distributions for the 12 C target. We used the following three effects to derive twelve different methods for the central optical potential: (i) Love and Franey and the Gaussian amplitudes, with the Brink and one-term Gaussian nuclear density distributions, (ii) Pauli co

APA, Harvard, Vancouver, ISO, and other styles

7

KHAN, Z. A., DEEKSHA CHAUHAN, and MINITA SINGH. "ANALYSIS OF p-4, 6, 8He AND p-6, 9, 11Li SCATTERING." International Journal of Modern Physics E 22, no. 11 (2013): 1350082. http://dx.doi.org/10.1142/s0218301313500821.

Full text

Abstract:

Using the Coulomb modified Glauber model, we analyze the elastic scattering of protons from He and Li isotopes at 60 MeV and 72 MeV. The calculations require two inputs; the nucleon–nucleon (NN) amplitude and the nucleon density distributions in target nuclei. The central part of the NN amplitude is taken from the available NN scattering observables. To find the spin-dependent part, we employ p-4 He scattering data to fix its parameter values. For target nuclei, we use nucleon density distributions available in the literature. The NN amplitude, as obtained in this work, is then used to study t

APA, Harvard, Vancouver, ISO, and other styles

8

Niskanen, J. A. "THE FORWARD AMPLITUDE IN LOW ENERGY $P\bar P$ SCATTERING." Modern Physics Letters A 03, no. 01 (1988): 57–64. http://dx.doi.org/10.1142/s021773238800009x.

Full text

Abstract:

It is shown that the abrupt rise of around 200 MeV/c in the real-to-imaginary ratio ρ of the forward scattering amplitude in low energy [Formula: see text] scattering is not due to the [Formula: see text] threshold or approximations in the treatment of the coulomb nuclear interference. The latter breaks down below Plab≈100 MeV/c. The possibility of a potential resonance is discussed.

APA, Harvard, Vancouver, ISO, and other styles

9

Bartels, J., L. N. Lipatov, and A. Prygarin. "MHV amplitude for 3→3 gluon scattering in Regge limit." Physics Letters B 705, no. 5 (2011): 507–12. http://dx.doi.org/10.1016/j.physletb.2011.09.061.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

KIM, YONG JOO, and MOON HOE CHA. "COULOMB-MODIFIED EIKONAL PHASE SHIFT ANALYSIS BASED ON HYPERBOLIC TRAJECTORY FOR 12C + 12C ELASTIC SCATTERINGS." International Journal of Modern Physics E 13, no. 02 (2004): 439–50. http://dx.doi.org/10.1142/s0218301304002296.

Full text

Abstract:

We present a Coulomb-modified eikonal model formalism based on hyperbolic trajectory for heavy-ion elastic scattering. This formalism has been applied satisfactorily to elastic scatterings of the 12 C + 12 C system at E lab =240, 360 and 1016 MeV. The presence of a nuclear rainbow in this system is evidenced through a classical deflection function. The Fraunhöfer oscillations observed in the elastic angular distributions can be explained due to interference between the near- and far-side amplitudes. We have found that the hyperbolic trajectory effect on the eikonal model is important when the

APA, Harvard, Vancouver, ISO, and other styles

11

BEREZHNOY, YU A., and V. P. MIKHAILYUK. "ELASTIC 12C–12C SCATTERING AT INTERMEDIATE ENERGIES." International Journal of Modern Physics E 11, no. 04 (2002): 281–87. http://dx.doi.org/10.1142/s0218301302000880.

Full text

Abstract:

The differential cross-sections for elastic 12C–12C scattering at 2400 and 1449 MeV are calculated on the basis of the multiple diffraction scattering theory and α-cluster model with dispersion. At the energy 2400 MeV the calculations were performed by means of "effective" and "free" α–α amplitudes. It is shown that the results obtained differ significantly.

APA, Harvard, Vancouver, ISO, and other styles

12

ROCA, L., та E. OSET. "EXTRACTION OF THE Λ(1405) POLES FROM π0Σ0 PHOTOPRODUCTION DATA". International Journal of Modern Physics: Conference Series 26 (січень 2014): 1460086. http://dx.doi.org/10.1142/s2010194514600866.

Full text

Abstract:

In this contribution we review a work where we showed how to extract the position of the two Λ(1405) poles from experimental photoproduction data which have been measured recently in the γp → K+π0Σ0 reaction at Jefferson Lab. Using a potential motivated by chiral dynamics but with free parameters, we solve the Bethe Salpeter equation in the coupled channels [Formula: see text] and πΣ in isospin I=0 and parameterize the amplitude for the photonuclear reaction in terms of a linear combination of the πΣ → πΣ and [Formula: see text] scattering amplitudes in I=0, with a different linear combination

APA, Harvard, Vancouver, ISO, and other styles

13

Tag El-Din, Ibrahim M. A., M. M. Taha, and Samia S. A. Hassan. "Study of p-4Hetotal reaction cross-section using Glauber and Coulomb-modified Glauber models." International Journal of Modern Physics E 23, no. 03 (2014): 1450010. http://dx.doi.org/10.1142/s0218301314500104.

Full text

Abstract:

The total nuclear reaction cross-section σRfor p-4He in the energy range from 25 MeV to 1000 MeV is calculated within Glauber and Coulomb-modified Glauber models. The Coulomb-modified Glauber model (CMGM) is introduced via modification of the Coulomb trajectory of the projectile from a straight line, and calculation of the effective radius of interaction. The effects of in-medium nucleon–nucleon (NN) total cross-section, phase variation, high order momentum transfer component of nucleon–nucleon elastic scattering amplitude and Pauli blocking are studied. It is pointed out that the phase variat

APA, Harvard, Vancouver, ISO, and other styles

14

LADYGINA, NADEZHDA B. "RESCATTERING EFFECTS IN DEUTERON-PROTON ELASTIC SCATTERING AT INTERMEDIATE ENERGIES." International Journal of Modern Physics A 26, no. 03n04 (2011): 728–30. http://dx.doi.org/10.1142/s0217751x11052669.

Full text

Abstract:

The deuteron-proton elastic scattering is considered at the deuteron energies from 500 up to 2000 MeV. The multiple-scattering-expansion technique is applied to evaluate the reaction amplitude. The one-nucleon-exchange, single scattering and double scattering contributions are taken into account. Also, some relativistic effects are included into consideration. The obtained results are compared with the experimental data both for the differential cross section and polarization observables.

APA, Harvard, Vancouver, ISO, and other styles

15

KIM, YONG JOO, and MOON HOE CHA. "SECOND-ORDER EIKONAL MODEL ANALYSIS OF16O+16OELASTIC SCATTERING." International Journal of Modern Physics E 10, no. 04n05 (2001): 373–86. http://dx.doi.org/10.1142/s0218301301000563.

Full text

Abstract:

We analyze the elastic scattering angular distributions of the16O +16O system at Elab=480 MeV and 704 MeV within the framework of the second-order eikonal model based on Coulomb trajectories of colliding nuclei. The diffractive oscillatory structure observed in the elastic angular distribution could be explained due to the interference between the near- and far-side scattering amplitudes. The presence of a nuclear rainbow in this system is evidenced through a classical deflection function. The effective optical potential is developed from the second-order non-eikonal phase shifts.

APA, Harvard, Vancouver, ISO, and other styles

16

Miller, Sean B. S., Andreas Ekström, and Christian Forssén. "Wave-packet continuum discretisation for nucleon–nucleon scattering predictions." Journal of Physics G: Nuclear and Particle Physics 49, no. 2 (2021): 024001. http://dx.doi.org/10.1088/1361-6471/ac3cfd.

Full text

Abstract:

Abstract In this paper we analyse the efficiency, precision, and accuracy of computing elastic nucleon–nucleon (NN) scattering amplitudes with the wave-packet continuum discretisation method (WPCD). This method provides approximate scattering solutions at multiple scattering energies simultaneously. We therefore utilise a graphics processing unit to explore the benefits of this inherent parallelism. From a theoretical perspective, the WPCD method promises a speedup compared to a standard matrix-inversion method. We use the chiral NNLOopt interaction to demonstrate that WPCD enables efficient c

APA, Harvard, Vancouver, ISO, and other styles

17

Pilipenko, V. V., and V. I. Kuprikov. "Model of multiple Dirac eikonal scattering of protons by nuclei." International Journal of Modern Physics E 27, no. 10 (2018): 1850088. http://dx.doi.org/10.1142/s021830131850088x.

Full text

Abstract:

The model of multiple Dirac eikonal scattering (MDES) of incident proton by target-nucleus nucleons is developed, in which new expressions for the elastic [Formula: see text]-scattering amplitudes are obtained from the multiple scattering Watson series with employing the eikonal approximation for the Dirac propagators of the free proton motion between successive scattering acts on nucleons. Based on this model, calculations for the complete set of observables of the elastic [Formula: see text] and [Formula: see text]Pb at 800[Formula: see text]MeV have been performed, using proton–nucleon ampl

APA, Harvard, Vancouver, ISO, and other styles

18

Babak, O. V., Yu A. Berezhnoy, and V. P. Mikhailyuk. "Born Approximation for Polarization Observables at the Scattering of Protons by 40Ca Nuclei." Ukrainian Journal of Physics 65, no. 5 (2020): 369. http://dx.doi.org/10.15407/ujpe65.5.369.

Full text

Abstract:

A development of the optical model for the description of the hadron-nucleus scattering is proposed. When describing the behavior of polarization observables for the elastic proton scattering on 40Ca nuclei in the energy interval from 200 to 800 MeV, the Born approximation is used. Analytical expressions for the scattering amplitudes, as well as for the differential cross-sections and polarization observables, are obtained. The comparison of the scattering observables calculated in the 1st and 2nd Born approximations is made. It is shown that the observables calculated in this approach are in

APA, Harvard, Vancouver, ISO, and other styles

19

AHMAD, I., M. A. ABDULMOMEN, and M. A. ALVI. "EIKONAL DESCRIPTION OF 12C–12C ELASTIC SCATTERING IN TERMS OF PHENOMENOLOGICAL EFFECTIVE NN POTENTIAL." International Journal of Modern Physics E 11, no. 06 (2002): 519–29. http://dx.doi.org/10.1142/s0218301302001022.

Full text

Abstract:

A phenomenological method of analysis for heavy-ion elastic scattering data at intermediate energies is proposed within the framework of the optical limit approximation of the Glauber multiple scattering theory. The essential point of our method is to evaluate the NN scattering amplitude in terms of a phenomenological effective NN potential the parameters of which are varied to fit the experimental data. It is applied to analyze 12C–12C elastic scattering data in the energy range of 25–200 MeV/nucleon with a good degree of success.

APA, Harvard, Vancouver, ISO, and other styles

20

Lukyanov, V. K., E. V. Zemlyanaya, K. V. Lukyanov, A. Y. Ellithi, and I. A. M. Abdul-Magead. "Study of elastic and inelastic pion-nucleus scattering using the microscopic model of optical potential." International Journal of Modern Physics E 24, no. 05 (2015): 1550035. http://dx.doi.org/10.1142/s0218301315500354.

Full text

Abstract:

The pion-nucleus microscopic optical potential (OP), defined by the pion-nucleon scattering amplitude and by the generalized density distribution of a target nucleus that incudes internal degrees of freedom, is applied to construct the pion-nucleus differential cross-sections of elastic and inelastic scattering on the nuclei 28 Si , 58 Ni , 208 Pb at T lab = 291 MeV. Calculations are based on the relativistic wave equation and thus relativistic effects and distortions on the relative motion wave functions are taken into account. The respective experimental data are analyzed and the in-medium p

APA, Harvard, Vancouver, ISO, and other styles

21

Badran, R. I., A. I. Istaiti, W. N. Mashaqbeh та I. H. Al-Lehyani. "Regge pole analysis of elastic scattering of α particles by even isotopes of Ni target nuclei at incident energies above Coulomb barrier". International Journal of Modern Physics E 24, № 11 (2015): 1550082. http://dx.doi.org/10.1142/s0218301315500822.

Full text

Abstract:

Regge pole model is adopted to account for the angular distribution at backward angles for a set of elastic scattering processes of incident [Formula: see text]-particles by different isotopes of nickel ions, [Formula: see text]Ni, at different laboratory energies above Coulomb barrier. The reproduction of cross-sections at backward angles is preceded by an attempt to fit the experimental data at forward angles of the scattering. Three-parameter McIntyre model which is based on concept of strong absorption parametrization of the scattering matrix elements, has been employed to analyze and repr

APA, Harvard, Vancouver, ISO, and other styles

22

Ghahramany, N., and H. Falinejad. "Formation of the interaction matrix in pion–nucleon scattering in optimal conditions and amplitude determination at 471, 547, and 625 MeV c−1." Canadian Journal of Physics 73, no. 9-10 (1995): 638–41. http://dx.doi.org/10.1139/p95-093.

Full text

Abstract:

The most recent measurements of the polarization parameters were used to determine the magnitudes and relative phase of spin amplitudes in charged pion – proton scattering at 471, 547, and 625 MeV c−1. In addition to optimal conditions, invariance laws were imposed to reduce the number of independent amplitudes to two. In the transverse frame we obtained two amplitudes both being nonflip. In the helicity frame also we obtained two amplitudes, one spin flip and the other being spin nonflip. The magnitudes of the transverse amplitudes were also determined at 2.39 GeV c−1 in terms of square momen

APA, Harvard, Vancouver, ISO, and other styles

23

Mahalanabis, Jayanti. "Determination of scattering amplitude from glauber model analysis of elastic scattering at 179.3 MeV." Nuclear Physics B - Proceedings Supplements 8 (June 1989): 268–70. http://dx.doi.org/10.1016/0920-5632(89)90237-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

MIKHAILYUK, V. P. "ELASTIC SCATTERING OF DEUTERONS ON α-CLUSTER NUCLEI". Modern Physics Letters A 10, № 38 (1995): 2915–21. http://dx.doi.org/10.1142/s0217732395003045.

Full text

Abstract:

The differential cross-sections for elastic scattering of deuterons on 12 C and 16 O nuclei at 700 MeV are calculated on the basis of multiple diffraction scattering theory and the α-cluster model with dispersion. For d−12 C scattering it was shown that the results of the calculations by the model, when the effects related with the deuteron structure included via deuteron-α amplitude are in better agreement with the experimental data than those by the model, in which incident deuteron is considered as composed of neutron and proton.

APA, Harvard, Vancouver, ISO, and other styles

25

Hausammann, R., E. Heer, R. Hess, et al. "Direct experimental reconstruction of theppelastic scattering amplitudes between 447 and 579 MeV." Physical Review D 40, no. 1 (1989): 22–34. http://dx.doi.org/10.1103/physrevd.40.22.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

CHAUHAN, DEEKSHA, and Z. A. KHAN. "16O-NUCLEUS ELASTIC SCATTERING IN THE ENERGY RANGE 300 MeV–1.503 GeV." International Journal of Modern Physics E 18, no. 09 (2009): 1887–902. http://dx.doi.org/10.1142/s0218301309013944.

Full text

Abstract:

In this work we analyze the elastic angular distribution for the scattering of 16 O from 12 C , 16 O , 28 Si , 40 Ca , 90 Zr , and 208 Pb in the energy range 300 MeV–1.503 GeV within the framework of the Coulomb modified correlation expansion for the Glauber amplitude. Our calculations involve (i) up to the two-body density term in the correlation expansion, (ii) the realistic nuclear form factors, and (iii) the high q-components of the basic (input) NN amplitude. The results are found to provide a satisfactory explanation of the data in all the cases. Moreover, we could assess the energy depe

APA, Harvard, Vancouver, ISO, and other styles

27

KIM, YONG JOO, and MOON HOE CHA. "NON-EIKONAL PHASE SHIFT ANALYSIS FOR 12C + 12C ELASTIC SCATTERING." International Journal of Modern Physics E 09, no. 01 (2000): 67–76. http://dx.doi.org/10.1142/s0218301300000052.

Full text

Abstract:

We present first-order non-eikonal correction to the eikonal phase shifts for heavy ion elastic scattering based on Coulomb trajectories of colliding nuclei. It has been applied satisfactorily to elastic angular distributions of the 12 C + 12 C system at E lab = 240, 360 and 1016 MeV. The refractive oscillations observed in the elastic scattering angular distributions could be explained due to interference between the near- and far-side amplitudes. The presence of a nuclear rainbow is evidenced through classical deflection function. We have found that the first-order non-eikonal effect on the

APA, Harvard, Vancouver, ISO, and other styles

28

Spangler, S. R. "Interstellar Magnetohydrodynamic Waves as Revealed by Radio Astronomy." Symposium - International Astronomical Union 140 (1990): 176. http://dx.doi.org/10.1017/s0074180900189880.

Full text

Abstract:

The plasma density fluctuations responsible for interstellar scintillations occur on the same scales as interstellar magnetohydrodynamic waves (Alfvén waves), which are responsible for many important processes such as the acceleration of the cosmic rays. This suggests that these density fluctuations represent a compressive component of MHD waves, and raises the exciting possibility that radioastronomical observations can provide more or less direct measurements of interstellar microphysical processes. Extraction of MHD wave properties from the radio scattering measurements requires a sound the

APA, Harvard, Vancouver, ISO, and other styles

29

Gou, B. "Initial Research of np Scattering with Polarized Deuterium Target at ANKE/COSY." International Journal of Modern Physics: Conference Series 40 (January 2016): 1660058. http://dx.doi.org/10.1142/s2010194516600582.

Full text

Abstract:

The quasi-free np charge-exchange reaction [Formula: see text] has to be employed to extend the investigations of np scattering at ANKE to the highest energy available at COSY. As the proof-of-principle experiment, the initial research has been conducted at proton energy [Formula: see text] MeV using a polarized Deuterium target. The vector and tensor analyzing powers [Formula: see text] and [Formula: see text] were measured for momentum transfers [Formula: see text] MeV/c. These data connect smoothly with the previous measurements at [Formula: see text] MeV/c performed using a polarized deute

APA, Harvard, Vancouver, ISO, and other styles

30

Lukyanov, Valery, Elena Zemlyanaya, and Konstantin Lukyanov. "Microscopic model of optical potential for testing the 12,14Be+p elastic scattering at 700 Mev." EPJ Web of Conferences 204 (2019): 09003. http://dx.doi.org/10.1051/epjconf/201920409003.

Full text

Abstract:

The data on the 12,14Be + p elastic scattering cross sections at 700 Mev are compared with those obtained by solving the relativistic wave equation with the microscopic optical potentials calculated as folding of the NN amplitude of scattering with densities of these nuclei in the form of the symmetrized Fermi function with the fitted radius and diffuseness parameters, and also with the densities obtained in two microscopic models, based on the Generator Coordinate Method (GCM) and the other one – on the Variational Method of Calculations (VMC). For 12Be, above models turn out to be in a small

APA, Harvard, Vancouver, ISO, and other styles

31

ARASH, FIROOZ, MICHEAL J. MORAVCSIK, and GARY R. GOLDSTEIN. "SIMPLE REACTION STRUCTURES IN A "COMPLICATED" KINEMATIC RANGE." International Journal of Modern Physics A 02, no. 03 (1987): 739–51. http://dx.doi.org/10.1142/s0217751x87000284.

Full text

Abstract:

The energy range between 500 and 1000 MeV is usually considered a "complicated" one for elastic proton-proton scattering in which there is no simple description. It is shown that in that energy range, for much of the angular range, two simple features of the magnitudes and relative phases of the invariant amplitudes in the planar transverse frame give a good approximation of the observed data on unpolarized cross section as well as all the various polarization measurements. The features appear to be particularly pronounced at the larger scattering angles and higher energies, thus suggesting a

APA, Harvard, Vancouver, ISO, and other styles

32

Wenying, Ruan, and Liu Youyan. "Phase variation in the NN amplitude and proton-nucleus scattering at 800 MeV." Journal of Physics G: Nuclear and Particle Physics 21, no. 4 (1995): 537–44. http://dx.doi.org/10.1088/0954-3899/21/4/005.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Dabylova, S. B., Yu N. Kopach, S. K. Sakhiyev, D. N. Grozdanov, and N. A. Fedorov. "Determination of the response function of the NaI detector for g-quanta with an energy of 4.43 MeV, formed during inelastic scattering of neutrons with an energy of 14.1 MeV on carbon nuclei." Eurasian Journal of Physics and Functional Materials 4, no. 4 (2020): 281–90. http://dx.doi.org/10.29317/ejpfm.2020040402.

Full text

Abstract:

The work is devoted to determining the response function of the detector NaI(Tl) for g -quanta with energy of 4.43 MeV, formed during inelastic scattering of neutrons with energy of 14.1 MeV on the nuclei 12C. In gamma spectrometry, output pulses are recorded, the amplitudes of which are proportional to the energy lost in the detection medium by incident photons. One of the main tasks of radiation detection is to restore radiation characteristics from signals measured at the outputs of detectors. For this, it is necessary to know, first of all, the general characteristics of detectors as conve

APA, Harvard, Vancouver, ISO, and other styles

34

URBÁN, J., A. BUDZANOWSKI, A. CHATTERJEE та ін. "SEARCH FOR BOUND η-NUCLEUS STATES". International Journal of Modern Physics A 24, № 02n03 (2009): 206–13. http://dx.doi.org/10.1142/s0217751x09043493.

Full text

Abstract:

The extracted s-wave scattering amplitude from both the polarized and unpolarized d + d → 4He + η reaction at 2385.5 MeV/c allowed to determine the scattering length which fulfills the requirements for bound η. In the p + 27Al → 3He + p + π- + X reaction studied at recoil free kinematics the η meson is produced almost at rest and so it can be bound with enhanced probability. This state proceeds via N*(1535) resonance and the decay products proton and pion emitted into opposite direction are detected in concidence with 3He produced at zero degree. Under these conditions some hints for bound sta

APA, Harvard, Vancouver, ISO, and other styles

35

Islam, M. Sujan, Ragib Absar Ramon, M. Mizanur Rahman, et al. "Primary rainbow and Airy minima in ¹²C + ¹²C elastic scattering with families of non-monotonic potentials*." Journal of Physics G: Nuclear and Particle Physics 48, no. 12 (2021): 125108. http://dx.doi.org/10.1088/1361-6471/ac2fb0.

Full text

Abstract:

Abstract The experimental differential cross section of the 12C + 12C elastic scattering over a wide laboratory energy scale 25 ⩽ E lab ⩽ 360 MeV are analyzed within the framework of the optical model (OM) using non-monotonic (NM) nucleus–nucleus potential. The real parts of the NM potentials are derived from the energy density functional (EDF) formalism with the sudden approximation embodying the Pauli exclusion principle and the imaginary parts are taken as phenomenology. The diffractive and the refractive scattering with Airy structures in the whole angular region of the 12C + 12C elastic s

APA, Harvard, Vancouver, ISO, and other styles

36

Gasparyan, A. M., M. F. M. Lutz, and B. Pasquini. "Spin Observables in Pion Photoproduction and Nucleon Compton Scattering from the Chiral Lagrangian and Dispersion Relations." International Journal of Modern Physics: Conference Series 40 (January 2016): 1660066. http://dx.doi.org/10.1142/s2010194516600661.

Full text

Abstract:

A scheme based on the chiral Lagrangian, analyticity and unitarity is applied to spin observables in pion photoproduction and nucleon Compton scattering. Subthreshold partial-wave amplitudes are calculated in chiral perturbation theory and extrapolated beyond the threshold region imposing the micro-causality and the unitarity constraint. A reasonable description of various spin observables up to energies [Formula: see text] MeV is obtained in terms of the parameters relevant at order [Formula: see text] in the chiral Lagrangian. Nucleon spin-polarizabilities predicted in our scheme are consist

APA, Harvard, Vancouver, ISO, and other styles

37

Nessi-Tedaldi, F., and M. Simonius. "Calculation of parity non-conserving pp-scattering amplitudes and analysis of a 45 MeV measurement." Physics Letters B 215, no. 1 (1988): 159–65. http://dx.doi.org/10.1016/0370-2693(88)91090-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Rudchik, A. T., A. A. Rudchik, O. E. Kutsyk та ін. "12С(15N,14N)13C reaction mechanisms at energy 81 MeV". Nuclear Physics and Atomic Energy 21, № 4 (2020): 295–301. http://dx.doi.org/10.15407/jnpae2020.04.295.

Full text

Abstract:

The new experimental data of the 12С(15N,14N)13С reaction cross-sections at the energy Еlab(15N) = 81 MeV were measured for the ground and excited states of 14N and 13C nuclei. The experimental data were analyzed within the coupled-reaction-channels method (CRC) using channels-coupling scheme with the 15N + 12С elastic scattering and one- as well as two-step transfers of nucleons and clusters performing CRC-calculations with the Woods - Saxon potentials (WS) for the entrance and exit reaction channels. The WS potential parameters for the 12С + 15N nuclear interaction were taken from the previo

APA, Harvard, Vancouver, ISO, and other styles

39

Kuo, S. P. "Mitigation of energetic electrons in the magnetosphere by amplified whistler wave under double cyclotron resonances." Nonlinear Processes in Geophysics 15, no. 5 (2008): 773–82. http://dx.doi.org/10.5194/npg-15-773-2008.

Full text

Abstract:

Abstract. An optimal approach reducing the population of MeV electrons in the magnetosphere is presented. Under a double resonance condition, whistler wave is simultaneously in cyclotron resonance with keV and MeV electrons. The injected whistler waves is first amplified by the background keV electrons via loss-cone negative mass instability to become effective in precipitating MeV electrons via cyclotron resonance elevated chaotic scattering. The numerical results show that a small amplitude whistler wave can be amplified by more than 25 dB. The amplification factor reduces only about 10 dB w

APA, Harvard, Vancouver, ISO, and other styles

40

Mahalanabis, Jayanti. "Determination of antiproton-neutron amplitude from elastic�p-deuteron scattering at 600 MeV/c." Zeitschrift f�r Physik A Hadrons and Nuclei 342, no. 1 (1992): 101–5. http://dx.doi.org/10.1007/bf01294494.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Rudchik, A. T., A. A. Rudchik, O. O. Chepurnov, et al. "6Li(10B,9Be)7Be reaction mechanisms. Structure and interaction of 9Be + 7Be nuclei." Nuclear Physics and Atomic Energy 22, no. 3 (2021): 230–36. http://dx.doi.org/10.15407/jnpae2021.03.230.

Full text

Abstract:

New experimental data of angular distributions for the 6Li(10B,9Be)7Be reaction were measured at the energy Elab(10B) = 51 MeV for the ground states of nuclei and excited 0.429 - 7.2 MeV states of 7Be. The reaction experimental data were analyzed within coupled-reaction-channels method (CRC) for many types of the nucleon and cluster transfers which spectroscopic amplitudes (factors) in the 9Be and 7Be nuclei were calculated using translation invariant shell model. The Woods - Saxon potential was used for CRC-calculations. The 6Li + 10B potential parameters were deduced before from the analysis

APA, Harvard, Vancouver, ISO, and other styles

42

AHMAD, I., and M. A. ALVI. "EIKONAL PHENOMENOLOGY FOR HEAVY-ION SCATTERING AT INTERMEDIATE ENERGIES." International Journal of Modern Physics E 13, no. 06 (2004): 1225–37. http://dx.doi.org/10.1142/s0218301304002685.

Full text

Abstract:

Working within the framework of the Coulomb modified Glauber model and the optical limit approximation, we propose a phenomenological method of analysis for heavy-ion elastic scattering data at intermediate energies. Instead of using the commonly employed Gaussian approximation for the input NN amplitude that is deficient in some respects at low intermediate energies, we evaluate it in terms of a three parameter phenomenological NN phase shift function. The application of the method to some 12 C -nucleus and 16 O -nucleus systems shows that a very good description of the elastic scattering dat

APA, Harvard, Vancouver, ISO, and other styles

43

Tonoian, D. S., A. V. Artemyev, X. J. Zhang, M. M. Shevelev, and D. L. Vainchtein. "Resonance broadening effect for relativistic electron interaction with electromagnetic ion cyclotron waves." Physics of Plasmas 29, no. 8 (2022): 082903. http://dx.doi.org/10.1063/5.0101792.

Full text

Abstract:

Relativistic electron scattering by electromagnetic ion cyclotron (EMIC) waves is one of the most effective mechanisms for >1 MeV electron flux depletion in the Earth's radiation belts. Resonant electron interaction with EMIC waves is traditionally described by quasi-linear diffusion equations, although spacecraft observations often report EMIC waves with intensities sufficiently large to trigger nonlinear resonant interaction with electrons. An important consequence of such nonlinear interaction is the resonance broadening effect due to high wave amplitudes. In this study, we quantify this

APA, Harvard, Vancouver, ISO, and other styles

44

JAIN, B. K., та A. B. SANTRA. "PARAMETRIZED t-MATRIX FOR pp → n Δ++ PROCESS". International Journal of Modern Physics E 01, № 01 (1992): 201–13. http://dx.doi.org/10.1142/s0218301392000096.

Full text

Abstract:

Considering that, in pp scattering, the pp → n Δ++ transition occurs mainly from the elastic channel, a t-matrix for this process was constructed by us earlier. This t-matrix describes the measured cross-sections on the p (p, n) Δ++ process very well from threshold to a few GeV. The transition potential in it is described by the one pion-exchange potential and the elastic scattering wave function through the "measured" elastic scattering amplitude. In this paper, we have parametrized this t-matrix so that it can be used for describing the (p, Δ++) reaction in nuclei. The parametrized t-matrix

APA, Harvard, Vancouver, ISO, and other styles

45

Barabash, O. "Calculation the production cross-section of the BSM boson via photon fusion reaction." Bulletin of Taras Shevchenko National University of Kyiv. Series: Physics and Mathematics, no. 2 (2019): 94–97. http://dx.doi.org/10.17721/1812-5409.2019/2.12.

Full text

Abstract:

The production cross-section of the beyond the standard model (BSM) scalar boson (S-boson) have been considered it the article. Scalar boson produced via photon fusion reaction in the deep inelastic scattering of a charged particle (proton or electron) on heavy nucleus of the target. This process is one of the possible mecha- nisms of BSM boson production at the SHiP (Search for Hidden Particles) experiment at the CERN LHC and may be dominating among others processes due to large nuclear charge. In a low-energy case for which virtual photon wavelength similar or bigger nuclear size one can con

APA, Harvard, Vancouver, ISO, and other styles

46

Nikoukar, Romina, Matthew E. Hill, Lawrence Brown, et al. "On the Energy Dependence of Galactic Cosmic Ray Anisotropies in the Very Local Interstellar Medium." Astrophysical Journal 934, no. 1 (2022): 41. http://dx.doi.org/10.3847/1538-4357/ac6fe5.

Full text

Abstract:

Abstract We report on the energy dependence of Galactic cosmic rays (GCRs) in the very local interstellar medium (VLISM) as measured by the Low Energy Charged Particle (LECP) instrument on the Voyager 1 spacecraft. The LECP instrument includes a dual-ended solid-state detector particle telescope mechanically scanning through 360° across eight equally spaced angular sectors. As reported previously, LECP measurements showed a dramatic increase in GCR intensities for all sectors of the ≥211 MeV count rate (CH31) at the Voyager 1 heliopause (HP) crossing in 2012; however, since then the count rate

APA, Harvard, Vancouver, ISO, and other styles

47

Alexander, N., K. Amos, and L. Berge. "Corrigendum: Mott?Schwinger Effect in the Elastic Scattering of Neutrons from 209Bi." Australian Journal of Physics 48, no. 4 (1995): 737. http://dx.doi.org/10.1071/ph950737.

Full text

Abstract:

The results presented in our recent paper are in error. All of the theoretical developments contained therein are correct but the Mott-Schwinger (MS) interaction was doubly counted for small radii in our computations. That had a significant effect upon the exact values of the small-f partial wave phase shifts. In fact, the correct variation of the first 20 partial wave phase shifts from purely nuclear scattering are much smaller than we presented before. Consequently the variation caused by the MS effect in predictions of the observables is smaller than previously indicated, and particularly s

APA, Harvard, Vancouver, ISO, and other styles

48

Kim, Yong Joo, and Moon Hoe Cha. "Tangential Velocity Corrections to a Second-Order Coulomb-Modified Eikonal Model for Heavy-Ion Elastic Scattering." International Journal of Modern Physics E 12, no. 04 (2003): 479–92. http://dx.doi.org/10.1142/s0218301303001399.

Full text

Abstract:

We present the tangential velocity corrections to the second-order Coulomb-modified eikonal model at the distance of closest approach. It has been applied to elastic angular distributions of the 16 O +16 O system at E lab =350 and 480 MeV. The calculated results with tangential velocity show better agreements with the experimental data compared to those with asymptotic velocity. The Fraunhöfer oscillations observed in the elastic angular distributions can be explained by the strong interference between the near- and the far-side amplitudes. Airy structures can be shown by reducing the effectiv

APA, Harvard, Vancouver, ISO, and other styles

49

Mezhevych, S. Yu, A. T. Rudchik, K. Rusek, et al. "Reaction 14C(11B, 12C)13B at Elab(11B) = 45 MeV, interaction of 13B + 12C versus that of 10,11,12B + 12C." Nuclear Physics and Atomic Energy 23, no. 1 (2022): 12–19. http://dx.doi.org/10.15407/jnpae2022.01.012.

Full text

Abstract:

New experimental data for differential cross-sections of the 14C(11B, 12C)13B reaction obtained recently at the energy Еlab(11B) = 45 MeV for the ground states of 13B and 12C were analyzed within the coupled reaction channels (CRC) method that included the 11B + 14C elastic scattering channel as well as channels for one- and two-step transfers of nucleons in the coupling scheme. The necessary 11B + 14C Woods - Saxon (WS) optical potential parameters for the entrance reaction channel were obtained from 11B elastic scattering in the previous work, while those for 12C + 13B interaction were deduc

APA, Harvard, Vancouver, ISO, and other styles

50

Tsurutani, B. T., L. D. Zhang, G. L. Mason, et al. "Particle transport in <sup>3</Sup>He-rich events: wave-particle interactions and particle anisotropy measurements." Annales Geophysicae 20, no. 4 (2002): 427–44. http://dx.doi.org/10.5194/angeo-20-427-2002.

Full text

Abstract:

Abstract. Energetic particles and MHD waves are studied using simultaneous ISEE-3 data to investigate particle propagation and scattering between the source near the Sun and 1 AU. 3 He-rich events are of particular interest because they are typically low intensity "scatter-free" events. The largest solar proton events are of interest because they have been postulated to generate their own waves through beam instabilities. For 3 He-rich events, simultaneous interplanetary magnetic spectra are measured. The intensity of the interplanetary "fossil" turbulence through which the particles have trav

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!