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Artykuły w czasopismach na temat „Baryonen”

Autor: Grafiati

Data publikacji: 7 grudnia 2024

Data aktualizacji: 31 lipca 2025

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1

LEDDIG, TORSTEN. "INVESTIGATION OF B-MESON DECAYS INTO BARYONS WITH THE BABAR DETECTOR." International Journal of Modern Physics A 26, no. 03n04 (2011): 545–48. http://dx.doi.org/10.1142/s0217751x11051986.

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We report on investigations of B-meson decays into baryons with the BABAR detector. The comparison of different decay channels reveals that higher multiplicities are preferred for these decays. Furthermore, an enhancement in the invariant baryon-antibaryon mass distribution can be observed in several baryonic decay modes. In addition, the study of baryon resonances seen in baryonic B-meson decays is presented.

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2

Pardo Calderón, Leandro Manuel. "Baryon Acoustic Oscillations. Equation and physical interpretation." Scientia et Technica 23, no. 2 (2018): 263–68. http://dx.doi.org/10.22517/23447214.17251.

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Baryon Acoustic Oscillations are a phenomenon occurred before matter-radiation decoupling, characterized because the baryonic matter perturbation presents oscillations, as the name suggests. These perturbations propagate like a pressure wave on the photon-baryon ﬂuid produced by gravitational potentials, which join the baryonic matter, and collisions of baryons and photons, which scatter it. This paper shows the Baryon Acoustic Oscillations equation and it provides its physical meaning. Besides, it presents software CAMB as a tool to ﬁnd BAO equation solutions and support for its physical desc

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3

GARCIA-RECIO, C., L. L. SALCEDO, D. GAMERMANN, J. NIEVES, O. ROMANETS, and L. TOLOS. "CHARMING BARYONS." International Journal of Modern Physics: Conference Series 26 (January 2014): 1460124. http://dx.doi.org/10.1142/s2010194514601240.

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We study odd-parity baryonic resonances with one heavy and three light flavors, dynamically generated by meson-baryon interactions. Special attention is paid to Heavy Quark Spin Symmetry (HQSS), hence pseudoscalar and vector mesons and baryons with Jπ = 1/2+ and 3/2+ are considered as constituent hadrons. For the hidden-charm sector ([Formula: see text]), the meson-baryon Lagrangian with Heavy Flavor Symmetry is constructed by a minimal extension of the SU(3) Weinberg-Tomozawa (WT) Lagrangian to fulfill HQSS, such that not new parameters are needed. This interaction can be presented in differe

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4

Khan, Mehbub, Yun Hao, and Jong-Ping Hsu. "Baryonic Force for Accelerated Cosmic Expansion and Generalized U1b Gauge Symmetry in Particle-Cosmology." EPJ Web of Conferences 168 (2018): 04004. http://dx.doi.org/10.1051/epjconf/201816804004.

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Based on baryon charge conservation and a generalized Yang-Mills symmetry for Abelian (and non-Abelian) groups, we discuss a new baryonic gauge field and its linear potential for two point-like baryon charges. The force between two point-like baryons is repulsive, extremely weak and independent of distance. However, for two extended baryonic systems, we have a dominant linear force α r. Thus, only in the later stage of the cosmic evolution, when two baryonic galaxies are separated by an extremely large distance, the new repulsive baryonic force can overcome the gravitational attractive force.

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5

HOSAKA, A., H. TOKI, and M. TAKAYAMA. "BARYON SPECTRA IN DEFORMED OSCILLATOR QUARK MODEL." Modern Physics Letters A 13, no. 21 (1998): 1699–707. http://dx.doi.org/10.1142/s0217732398001777.

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We study theoretically the baryon spectra in terms of a deformed oscillator quark (DOQ) model. This model is motivated by confinement of quarks and chiral symmetry breaking, which are the most important nonperturbative phenomena of QCD. The minimization of the DOQ Hamiltonian with respect to the deformation for each principal quantum number results in deformations for the intrinsic states of excited baryonic states. We find that the resulting baryon spectra agree very well with the existing experimental data including SU(3) baryons. The spatial deformation of the baryonic excited states carry

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6

Dominguez-Tenreiro, Rosa, and Gustavo Yepes. "On the Possibility of a Higher Baryonic Contribution to Dark Matter." Symposium - International Astronomical Union 130 (1988): 592. http://dx.doi.org/10.1017/s0074180900137180.

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The most stringent constraint against baryonic dark matter is provided by primordial nucleosynthesis. Agreement between theory and observations is reachedonly for a limited range of the baryon-to-photon ratio ‘LR, namely , which implies that, in standard cosmological frameworks, the universe cannot be closed by baryons.

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7

Kostyuk, Ivan, Robert Lilow, and Matthias Bartelmann. "Baryon-photon interactions in Resummed Kinetic Field Theory." Journal of Cosmology and Astroparticle Physics 2023, no. 09 (2023): 032. http://dx.doi.org/10.1088/1475-7516/2023/09/032.

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Abstract We explore how interactions between baryons and photons can be incorporated into Kinetic Field Theory (KFT), a description of cosmic structure formation based on classical Hamiltonian particle dynamics. In KFT, baryons are described as effective mesoscopic particles which represent fluid elements governed by the hydrodynamic equations. In this paper, we modify the mesoscopic particle model to include pressure effects exerted on baryonic matter through interactions with photons. As a proof of concept, we use this extended mesoscopic model to describe the tightly coupled baryon-photon f

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8

Martinsson, Thomas, Marc Verheijen, Matthew Bershady, Kyle Westfall, David Andersen, and Rob Swaters. "Mass distributions in disk galaxies." Proceedings of the International Astronomical Union 11, S321 (2016): 283. http://dx.doi.org/10.1017/s1743921316011169.

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AbstractWe present results on luminous and dark matter mass distributions in disk galaxies from the DiskMass Survey. As expected for normal disk galaxies, stars dominate the baryonic mass budget in the inner region of the disk; however, at about four optical scale lengths (hR) the atomic gas starts to become the dominant contributor. Unexpectedly, we find the total baryon to dark-matter fraction within a galaxy stays nearly constant with radius from 1hR out to at least 6hR, with a baryon fraction of 15–50% among galaxies. On average, only one third of the mass within 2.2hR in a disk galaxy is

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9

Ghalenovi, Zahra. "Study of Heavy Strange Baryons in a Hypercentral Quark Model." International Journal of Modern Physics: Conference Series 46 (January 2018): 1860037. http://dx.doi.org/10.1142/s2010194518600376.

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In this work, we study the properties of the heavy baryons with strangeness employing a constituent quark model in the hypercentral approach. The potential model considers the interactions arising the one-gluon exchange, Goldstone boson exchange and confinement, aspects of underlying theory, quantum chromodynamics (QCD). By solving three-body Schrodinger equation of baryonic system, we obtain the ground as well as the corresponding energy eigenvalues of the system. Using the obtained energies, we calculate the baryon spectrum. We extend our scheme to predict the radiative decay width of the ch

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10

Huang, Hung-Jin, Tim Eifler, Rachel Mandelbaum, et al. "Dark energy survey year 1 results: Constraining baryonic physics in the Universe." Monthly Notices of the Royal Astronomical Society 502, no. 4 (2021): 6010–31. http://dx.doi.org/10.1093/mnras/stab357.

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ABSTRACT Measurements of large-scale structure are interpreted using theoretical predictions for the matter distribution, including potential impacts of baryonic physics. We constrain the feedback strength of baryons jointly with cosmology using weak lensing and galaxy clustering observables (3 × 2pt) of Dark Energy Survey (DES) Year 1 data in combination with external information from baryon acoustic oscillations (BAO) and Planck cosmic microwave background polarization. Our baryon modelling is informed by a set of hydrodynamical simulations that span a variety of baryon scenarios; we span th

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11

Bertschinger, Edmund. "Galaxy Formation in a Universe Dominated by Cold Dark Matter." Symposium - International Astronomical Union 117 (1987): 360. http://dx.doi.org/10.1017/s0074180900150478.

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ABSTRACT The mass spectrum of bound baryonic systems (galaxies and globular clusters) is computed as a function of redshift in an Einstein-de Sitter (Ω=1) universe dominated by weakly interacting, cold dark matter. Baryons are assumed to fall into primordial density peaks in the cold particle distribution when the mass in the peaks exceeds the baryon Jeans mass. The distribution of peaks is computed using Gaussian statistics. As the universe expands the baryonic mass attached to a given peak increases because of infall (treated in a spherical approximation), and new peaks of lower amplitude be

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12

Wright, Ruby J., Claudia del P. Lagos, Chris Power, and Peter D. Mitchell. "The impact of stellar and AGN feedback on halo-scale baryonic and dark matter accretion in the eagle simulations." Monthly Notices of the Royal Astronomical Society 498, no. 2 (2020): 1668–92. http://dx.doi.org/10.1093/mnras/staa2359.

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ABSTRACT We use the eagle suite of hydrodynamical simulations to analyse accretion rates (and the breakdown of their constituent channels) on to haloes over cosmic time, comparing the behaviour of baryons and dark matter (DM). We also investigate the influence of sub-grid baryon physics on halo-scale inflow, specifically the consequences of modelling radiative cooling, as well as feedback from stars and active galactic nuclei (AGNs). We find that variations in halo baryon fractions at fixed mass (particularly their circumgalactic medium gas content) are very well correlated with variations in

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13

Ciepał, Izabela. "Studies of Time-like Electromagnetic Structure of Baryons with HADES." EPJ Web of Conferences 291 (2024): 01011. http://dx.doi.org/10.1051/epjconf/202429101011.

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We present results of studies of Dalitz decays of baryon resonances (R→Ne+e−) in proton-proton (pp) and pion-proton (πp) collisions performed by the HADES collaboration. They provided the first measurement of electromag netic transition form factors of baryons in the time-like region and contribute to the understanding of the photon-baryon coupling and the role of Vector Dom inance Model in a baryonic sector. We discuss also implications of the results to the understanding of the emissivity of dense and hot QCD matter created in heavy-ion collisions and the role played by the in-medium modific

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14

Khan, Shahid, Viktor Klochkov, Olha Lavoryk та ін. "Machine Learning Application for Λ Hyperon Reconstruction in CBM at FAIR". EPJ Web of Conferences 259 (2022): 13008. http://dx.doi.org/10.1051/epjconf/202225913008.

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The Compressed Baryonic Matter experiment at FAIR will investigate the QCD phase diagram in the region of high net-baryon densities. Enhanced production of strange baryons, such as the most abundantly produced Λ hyperons, can signal transition to a new phase of the QCD matter. In this work, the CBM performance for reconstruction of the Λ hyperon via its decay to proton and π− is presented. Decay topology reconstruction is implemented in the Particle-Finder Simple (PFSimple) package with Machine Learning algorithms providing effcient selection of the decays and high signal to background ratio.

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15

Castro, T., S. Borgani, M. Costanzi, et al. "Euclid preparation." Astronomy & Astrophysics 685 (May 2024): A109. http://dx.doi.org/10.1051/0004-6361/202348388.

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The Euclid photometric survey of galaxy clusters stands as a powerful cosmological tool, with the capacity to significantly propel our understanding of the Universe. Despite being subdominant to dark matter and dark energy, the baryonic component of our Universe holds substantial influence over the structure and mass of galaxy clusters. This paper presents a novel model that can be used to precisely quantify the impact of baryons on the virial halo masses of galaxy clusters using the baryon fraction within a cluster as a proxy for their effect. Constructed on the premise of quasi-adiabaticity,

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16

Schramm, D. N. "Cosmological Dark Matter." International Journal of Modern Physics D 06, no. 04 (1997): 393–407. http://dx.doi.org/10.1142/s0218271897000236.

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The basic arguments for cosmological dark matter are reviewed. It is shown that the Big Bange Nucleosynthesis constraints on the cosmological baryon density, when compared with dynamical arguments, demonstrate that the bulk of the baryons are dark and also that the bulk of the matter in the universe is nonbaryonic. The recent extragalactic deuterium observations as well as the other light element abundances were examined in detail as is the argument on the number of neutrino flavors. Arguments from recent MACHO/EROS observations of halo dark matter seem to imply that at least some of the dark

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17

Schramm, D. N. "Big Bang Nucleosynthesis." Symposium - International Astronomical Union 187 (2002): 1–15. http://dx.doi.org/10.1017/s0074180900113695.

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Big Bang Nucleosynthesis (BBN) is on the verge of undergoing a transformation now that extragalactic deuterium is being measured. Previously, the emphasis was on demonstrating the concordance of the Big Bang Nucleosynthesis model with the abundances of the light isotopes extrapolated back to their primordial values using stellar and Galactic evolution theories. Once the primordial deuterium abundance is converged upon, the nature of the field will shift to using the much more precise primordial D/H to constrain the more flexible stellar and Galactic evolution models (although the question of p

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18

Karthein, Jamie M., Volker Koch, Claudia Ratti, and Volodymyr Vovchenko. "Constraints on hadron resonance gas interactions via first-principles Lattice QCD susceptibilities." EPJ Web of Conferences 276 (2023): 03014. http://dx.doi.org/10.1051/epjconf/202327603014.

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We investigate extensions of the Hadron Resonance Gas (HRG) Model beyond the ideal case by incorporating both attractive and repulsive interactions into the model. When considering additional states exceeding those measured with high confidence by the Particle Data Group, attractive corrections to the overall pressure in the HRG model are imposed. On the other hand, we also apply excluded-volume corrections, which ensure there is no overlap of baryons by turning on repulsive (anti)baryon-(anti)baryon interactions. We emphasize the complementary nature of these two extensions and identify combi

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19

Du, Lipei, Chun Shen, Sangyong Jeon, and Charles Gale. "Constraints on initial baryon stopping and equation of state from directed flow." EPJ Web of Conferences 296 (2024): 05011. http://dx.doi.org/10.1051/epjconf/202429605011.

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Our investigation focuses on the rapidity-dependent directed flow, v1(y), of identified hadrons in Au+Au collisions across a broad range of √SNN from 7.7 to 200 GeV. Employing a (3+1)-dimensional hybrid framework, our study successfully reproduces the characteristic features of the measured v1(y) for both mesons and baryons across the considered beam energies. Notably, our analysis reveals the constraining power of baryonic v1(y) on the initial baryon stopping mechanism. Together with mesonic v1(y), the directed flow serves as a crucial tool for probing the equation of state governing dense nu

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20

Rauner, Max. "Bits statt Baryonen: In der IT-Branche sind Physikerinnen und Physiker gern gesehen - wer mehr als Programmieren will, muss teamfähig sein." Physik Journal 57, no. 5 (2001): 33–37. http://dx.doi.org/10.1002/phbl.20010570512.

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21

Lu, Tianhuan, and Zoltán Haiman. "The impact of baryons on cosmological inference from weak lensing statistics." Monthly Notices of the Royal Astronomical Society 506, no. 3 (2021): 3406–17. http://dx.doi.org/10.1093/mnras/stab1978.

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ABSTRACT As weak lensing surveys are becoming deeper and cover larger areas, information will be available on small angular scales down to the arcmin level. To extract this extra information, accurate modelling of baryonic effects is necessary. In this work, we adopt a baryonic correction model, which includes gas both bound inside and ejected from dark matter (DM) haloes, a central galaxy, and changes in the DM profile induced by baryons. We use this model to incorporate baryons into a large suite of DM-only N-body simulations, covering a grid of 75 cosmologies in the Ωm–σ8 parameter space. W

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22

CIARCELLUTI, PAOLO. "COSMOLOGY WITH MIRROR DARK MATTER I: LINEAR EVOLUTION OF PERTURBATIONS." International Journal of Modern Physics D 14, no. 02 (2005): 187–221. http://dx.doi.org/10.1142/s0218271805006213.

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This is the first paper of a series devoted to the study of the cosmological implications of the parallel mirror world with the same microphysics as the ordinary one, but having smaller temperature, with a limit set by the BBN constraints. The difference in temperature of the ordinary and mirror sectors generates shifts in the key epochs for structure formation, which proceeds in the mirror sector under different conditions. We consider adiabatic scalar primordial perturbations as an input and analyze the trends of all the relevant scales for structure formation (Jeans length and mass, Silk sc

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23

Voit, G. Mark, Benjamin D. Oppenheimer, Eric F. Bell, Bryan Terrazas, and Megan Donahue. "Black Hole Growth, Baryon Lifting, Star Formation, and IllustrisTNG." Astrophysical Journal 960, no. 1 (2023): 28. http://dx.doi.org/10.3847/1538-4357/ad0039.

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Abstract Quenching of star formation in the central galaxies of cosmological halos is thought to result from energy released as gas accretes onto a supermassive black hole. The same energy source also appears to lower the central density and raise the cooling time of baryonic atmospheres in massive halos, thereby limiting both star formation and black hole growth, by lifting the baryons in those halos to greater altitudes. One predicted signature of that feedback mechanism is a nearly linear relationship between the central black hole’s mass (M BH) and the original binding energy of the halo’s

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24

Hofmeister, Anne M., Robert E. Criss, and Hugh Chou. "Baryonic Mass Inventory for Galaxies and Rarefied Media from Theory and Observations of Rotation and Luminosity." Galaxies 11, no. 5 (2023): 100. http://dx.doi.org/10.3390/galaxies11050100.

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Available inventories of baryonic mass in the universe are based largely on galactic data and empirical calculations made >20 years ago. Values falling below cosmological estimates underlie proposals that certain rarified gassy regions could have extremely high T, which motivated absorption measurements and hydrodynamic models. Yet, the shortfall remains. We inventory the total baryonic mass, focusing on gravitational interactions and updated measurements. A recent analytical inverse method for analyzing galactic rotation curves quantified how baryon mass and associated volumetric density (

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25

Planat, Michel. "Baryonic Matter, Ising Anyons and Strong Quantum Gravity." International Journal of Topology 2, no. 2 (2025): 4. https://doi.org/10.3390/ijt2020004.

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We find that the whole set of known baryons of spin parity JP=12+ (the ground state) and JP=32+ (the first excited state) is organized in multiplets which may efficiently be encoded by the multiplets of conjugacy classes in the small finite group G=(192, 187). A subset of the theory is the small group (48, 29)≅GL(2, 3) whose conjugacy classes are in correspondence with the baryon families of Gell-Mann’s octet and decuplet. G has many of its irreducible characters that are minimal and informationally complete quantum measurements that we assign to the baryon families. Since G is isomorphic to t

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26

Courteau, Stéphane. "The Distribution of Mass in (Disk) Galaxies: Maximal or Not?" Proceedings of the International Astronomical Union 10, S309 (2014): 364–70. http://dx.doi.org/10.1017/s1743921314010540.

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AbstractThe relative distribution of matter in galaxies ought to be one of the most definitive predictions of galaxy formation models yet its validation is challenged by numerous observational, theoretical, and operational challenges. All galaxies are believed to be dominated by an invisible matter component in their outskirts. A debate has however been blazing for the last two decades regarding the relative fraction of baryons and dark matter in the inner parts of galaxies: whether galaxies are centrally dominated by baryons (“maximal disk”) is of issue. Some of those debates have been miscon

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27

McGaugh, Stacy S. "The Halo by Halo Missing Baryon Problem." Proceedings of the International Astronomical Union 3, S244 (2007): 136–45. http://dx.doi.org/10.1017/s1743921307013920.

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AbstractThe global missing baryon problem – that the sum of observed baryons falls short of the number expected form BBN – is well known. In addition to this, there is also a local missing baryon problem that applies to individual dark matter halos. This halo by halo missing baryon problem is such that the observed mass fraction of baryons in individual galaxies falls short of the cosmic baryon fraction. This deficit is a strong function of circular velocity. I give an empirical estimate of this function, and note the presence of a critical scale of ~ 900 km s−1 therein. I also briefly review

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PAGE, PHILIP R. "HYBRID AND CONVENTIONAL BARYONS IN THE FLUX-TUBE AND QUARK MODELS." International Journal of Modern Physics A 20, no. 08n09 (2005): 1791–96. http://dx.doi.org/10.1142/s0217751x05023347.

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The status of conventional baryon flux-tubes and hybrid baryons is reviewed. Recent surprises are that a model prediction indicates that hybrid baryons are very weakly produced in glue-rich Ψ decays, and an analysis of electro-production data concludes that the Roper resonance is not a hybrid baryon. The baryon decay flux-tube overlap has been calculated in the flux-tube model, and is discussed here. The behavior of the overlap follows naïve expectations.

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29

Wicker, Raphaël, Marian Douspis, Laura Salvati, and Nabila Aghanim. "Constraining hydrostatic mass bias and cosmological parameters with the gas mass fraction in galaxy clusters." EPJ Web of Conferences 257 (2022): 00046. http://dx.doi.org/10.1051/epjconf/202225700046.

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The gas mass fraction in galaxy clusters is a convenient tool to use in the context of cosmological studies. Indeed this quantity allows to constrain the universal baryon fraction Ωb/Ωm, as well as other parameters like the matter density Ωm, the Hubble parameter h or the Equation of State of Dark Energy w. This gas mass fraction is also sensitive to baryonic effects that need to be taken into account, and that translate into nuisance parameters. Two of them are the depletion factor ϒ, and the hydrostatic mass bias B = (1 - b). The first one describes how baryons are depleted in clusters with

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30

Bian, Jian-Ming, Vladimir Bytev, Ying Chen, et al. "Chapter 10 Baryon Spectrum." International Journal of Modern Physics A 24, supp01 (2009): 233–50. http://dx.doi.org/10.1142/s0217751x09046527.

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Hofmeister, Anne M. "Thermodynamic Constraints on the Non-Baryonic Dark Matter Gas Composing Galactic Halos." Galaxies 8, no. 4 (2020): 77. http://dx.doi.org/10.3390/galaxies8040077.

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To explain rotation curves of spiral galaxies through Newtonian orbital models, massive halos of non-baryonic dark matter (NBDM) are commonly invoked. The postulated properties are that NBDM interacts gravitationally with baryonic matter, yet negligibly interacts with photons. Since halos are large, low-density gaseous bodies, their postulated attributes can be tested against classical thermodynamics and the kinetic theory of gas. Macroscopic models are appropriate because these make few assumptions. NBDM–NBDM collisions must be elastic to avoid the generation of light, but this does not permi

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Ma, Yong-Liang, and Mannque Rho. "Dichotomy of Baryons as Quantum Hall Droplets and Skyrmions: Topological Structure of Dense Matter." Symmetry 13, no. 10 (2021): 1888. http://dx.doi.org/10.3390/sym13101888.

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We review a new development on the possible direct connection between the topological structure of the Nf=1 baryon as a FQH droplet and that of the Nf≥2 baryons (such as nucleons and hyperons) as skyrmions. This development suggests a possible “domain-wall (DW)” structure of compressed baryonic matter at high density expected to be found in the core of massive compact stars. Our theoretical framework is anchored on an effective nuclear effective field theory that incorporates two symmetries either hidden in the vacuum in QCD or emergent from strong nuclear correlations. It presents a basically

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Thakre, Mangleshwar. "Distribution of Baryonic and Dark Matter in Spiral Galaxies." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 4131–35. http://dx.doi.org/10.22214/ijraset.2021.35925.

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In the present paper, the distributions of baryonic and dark matter are derived for 24 northern sky spiral galaxies. The baryonic mass surface density profile is derived, and the component of the galaxies' observed rotation due to the baryons (stars and gas) is computed. Thus, the baryonic rotation curve of each sampled galaxy is separated from the observed rotation curve given in data base (Stapehane Courteau).

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Borrow, Josh, Daniel Anglés-Alcázar, and Romeel Davé. "Cosmological baryon transfer in the simba simulations." Monthly Notices of the Royal Astronomical Society 491, no. 4 (2019): 6102–19. http://dx.doi.org/10.1093/mnras/stz3428.

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ABSTRACT We present a framework for characterizing the large-scale movement of baryons relative to dark matter in cosmological simulations, requiring only the initial conditions and final state of the simulation. This is performed using the spread metric that quantifies the distance in the final conditions between initially neighbouring particles, and by analysing the baryonic content of final haloes relative to that of the initial Lagrangian regions (LRs) defined by their dark matter component. Applying this framework to the simba cosmological simulations, we show that 40 per cent (10 per cen

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35

Robertson, Andrew, David Harvey, Richard Massey, et al. "Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons." Monthly Notices of the Royal Astronomical Society 488, no. 3 (2019): 3646–62. http://dx.doi.org/10.1093/mnras/stz1815.

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ABSTRACT We present bahamas-SIDM, the first large-volume, $(400 \, h^{-1} \mathrm{\, Mpc})^{3}$, cosmological simulations including both self-interacting dark matter (SIDM) and baryonic physics. These simulations are important for two primary reasons: (1) they include the effects of baryons on the dark matter distribution and (2) the baryon particles can be used to make mock observables that can be compared directly with observations. As is well known, SIDM haloes are systematically less dense in their centres, and rounder, than CDM haloes. Here, we find that that these changes are not reflect

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DMITRAŠINOVIĆ, V., KEITARO NAGATA, and ATSUSHI HOSAKA. "CHIRAL PROPERTIES OF BARYON INTERPOLATING FIELDS." Modern Physics Letters A 23, no. 27n30 (2008): 2381–84. http://dx.doi.org/10.1142/s0217732308029423.

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We study the chiral transformation properties of all possible local (non-derivative) interpolating field operators for baryons consisting of three quarks with two flavors, assuming good isospin symmetry. We derive and use the relations/identities among the baryon operators with identical quantum numbers that follow from the combined color, Dirac and isospin Fierz transformations. These relations reduce the number of independent baryon operators with any given spin and isospin. The Fierz identities also effectively restrict allowed baryon chiral multiplets. It turns out that the chiral multiple

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Bernardini, M., R. Feldmann, D. Anglés-Alcázar, et al. "From EMBER to FIRE: predicting high resolution baryon fields from dark matter simulations with deep learning." Monthly Notices of the Royal Astronomical Society 509, no. 1 (2021): 1323–41. http://dx.doi.org/10.1093/mnras/stab3088.

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ABSTRACT Hydrodynamic simulations provide a powerful, but computationally expensive, approach to study the interplay of dark matter and baryons in cosmological structure formation. Here, we introduce the EMulating Baryonic EnRichment (EMBER) Deep Learning framework to predict baryon fields based on dark matter-only simulations thereby reducing computational cost. EMBER comprises two network architectures, U-Net and Wasserstein Generative Adversarial Networks (WGANs), to predict 2D gas and H i densities from dark matter fields. We design the conditional WGANs as stochastic emulators, such that

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Debackere, Stijn N. B., Joop Schaye, and Henk Hoekstra. "How baryons can significantly bias cluster count cosmology." Monthly Notices of the Royal Astronomical Society 505, no. 1 (2021): 593–609. http://dx.doi.org/10.1093/mnras/stab1326.

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ABSTRACT We quantify two main pathways through which baryonic physics biases cluster count cosmology. We create mock cluster samples that reproduce the baryon content inferred from X-ray observations. We link clusters to their counterparts in a dark matter-only universe, whose abundances can be predicted robustly, by assuming the dark matter density profile is not significantly affected by baryons. We derive weak lensing halo masses and infer the best-fitting cosmological parameters Ωm, S8 = σ8(Ωm/0.3)0.2, and w0 from the mock cluster sample. We find that because of the need to accommodate the

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Kiren, O. V., Arun Kenath, and Chandra Sivaram. "Primordial Planets with an Admixture of Dark Matter Particles and Baryonic Matter." Universe 9, no. 9 (2023): 401. http://dx.doi.org/10.3390/universe9090401.

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It has been suggested that primordial planets could have formed in the early universe and the missing baryons in the universe could be explained by primordial free-floating planets of solid hydrogen. Many such planets were recently discovered around the old and metal-poor stars, and such planets could have formed in early epochs. Another possibility for missing baryons in the universe could be that these baryons are admixed with DM particles inside the primordial planets. Here, we discuss the possibility of the admixture of baryons in the DM primordial planets discussed earlier. We consider gr

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ISHII, TAKAAKI. "LONG-DISTANCE PROPERTIES OF BARYONS IN THE SAKAI-SUGIMOTO MODEL." International Journal of Modern Physics: Conference Series 21 (January 2013): 187–88. http://dx.doi.org/10.1142/s2010194513009732.

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We reconsider the realization of baryons in the Sakai-Sugimoto model. It has previously been shown that, at least with the standard approach to calculations of baryon properties in the theory, one does not reproduce some model-independent predictions for the behavior of baryon electromagnetic form factors connected with long-range pion physics. It is suspected that the pion contributions has been dropped because of the linearization approximations. We study the long-range properties of baryons without relying on the approximations. The baryon solution we obtain gives the correct result for the

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LAPORTA, VINCENZO. "FINAL STARE INTERACTION ENHANCEMENT EFFECT ON THE NEAR THRESHOLD $p\bar p$ SYSTEM IN $B^\pm\to p\bar p \pi^\pm$ DECAY." International Journal of Modern Physics A 22, no. 29 (2007): 5401–11. http://dx.doi.org/10.1142/s0217751x07037949.

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We discuss the low-mass enhancement effect in the baryon–antibaryon invariant mass in three-body baryonic B decays using final state interactions in the framework of Regge theory. We show that the rescattering between baryonic pair can reproduce the observed mass spectrum.

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Matskevich, Elena. "Bottom (70,1-) baryon multiplet." E3S Web of Conferences 164 (2020): 01008. http://dx.doi.org/10.1051/e3sconf/202016401008.

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The aim of this paper is to derive systems of equations for the amplitudes for the case of negative parity (70,1-) bottom nonstrange baryons and to calculate the masses of these particles. In order to calculate masses of (70,1-) bottom baryons we use the relativistic quark model. The relativistic three-quark equations of the (70,1-) bottom baryon multiplet are derived in the framework of the dispersion relation technique. The relativistic three-quark equations of the (70,1-) bottom baryon multiplet are derived. The approximate solutions of these equations using the method based on the extracti

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Lin, Fan, та Yong-Liang Ma. "Baryon Construction with η′ Meson Field". Symmetry 17, № 4 (2025): 477. https://doi.org/10.3390/sym17040477.

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In the low-energy regime, baryons with Nf≥2 have long been constructed as skyrmions or through bag models, but such constructions for Nf=1 are hindered by the trivial topological structure of the meson field. Recent proposals suggest that one-flavor baryons can instead be interpreted as quantum Hall droplets on the η′ domain wall, providing a potential link to quark–hadron continuity at high density. In retrospect, the qualitative or semi-qualitative construction of one-flavor baryons on the η′ domain wall reveals that these baryons can be described as quantum Hall droplets, resembling topolog

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Buchmann, Alfons J. "Ernest Henley and the shape of baryons." International Journal of Modern Physics E 27, no. 12 (2018): 1840009. http://dx.doi.org/10.1142/s0218301318400098.

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Calculations of pion–baryon couplings, baryon quadrupole and octupole moments, baryon spin and orbital angular momentum done in collaboration with Ernest Henley are reviewed. A common theme of this work is the shape of baryons. Also, a personal account of my work with Ernest Henley during the period 1999–2013 is given.

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Santos-Santos, Isabel M. E., Julio F. Navarro, Andrew Robertson, et al. "Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves." Monthly Notices of the Royal Astronomical Society 495, no. 1 (2020): 58–77. http://dx.doi.org/10.1093/mnras/staa1072.

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ABSTRACT We use a compilation of disc galaxy rotation curves to assess the role of the luminous component (‘baryons’) in the rotation curve diversity problem. As in earlier work, we find that rotation curve shape correlates with baryonic surface density: high surface density galaxies have rapidly rising rotation curves consistent with cuspy cold dark matter haloes; slowly rising rotation curves (characteristic of galaxies with inner mass deficits or ‘cores’) occur only in low surface density galaxies. The correlation, however, seems too weak to be the main driver of the diversity. In addition,

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PAULINI, MANFRED. "PROPERTIES OF HEAVY B HADRONS." International Journal of Modern Physics A 24, no. 24 (2009): 4413–35. http://dx.doi.org/10.1142/s0217751x09046114.

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We review recent measurements of heavy B hadron states including masses and lifetimes of the [Formula: see text] meson as well as excited B states [Formula: see text]. We discuss properties of the [Formula: see text] meson such as lifetime, lifetime difference ΔΓs/Γs and CP violation in [Formula: see text] decays. We also summarize new measurements of the masses and lifetimes of bottom baryons including the [Formula: see text] baryon, the Σb baryon states as well as the [Formula: see text] and [Formula: see text] baryons.

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Meadows, Brian T. "Charm Decays at B Factories." International Journal of Modern Physics A 21, no. 27 (2006): 5436–44. http://dx.doi.org/10.1142/s0217751x06034574.

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Recent results relating to charm baryon and meson decays from the Belle and BABAR experiments are presented. In addition to recent observations for charm hyperons, evidence for a new charm baryon state, the Λc(2940), observed in its decay to D0p is also reported. No evidence for doubly charmed baryons is seen in e+e- interactions. A measurement of the spin of the Ω- hyperon is made using decays of the [Formula: see text] and [Formula: see text] baryons. On the assumption that the spin of the parent baryons are J = 1/2, the assignment J = 3/2 is confirmed and both J = 1/2 and also higher spins

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RICHARD, JEAN-MARC. "BARYON SPECTROSCOPY AND HEAVY QUARKS." International Journal of Modern Physics: Conference Series 02 (January 2011): 168–72. http://dx.doi.org/10.1142/s2010194511000754.

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Two topics are briefly reviewed in this talk: the decay of flavored hadrons or quarkonium states involving a baryon–antibaryon pair, and the spectroscopy of heavy baryons containing one, two or three heavy quarks. Some prospects for exotic heavy baryons are also discussed.

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Russ, James S. "New Results on Heavy Flavor Baryons." International Journal of Modern Physics A 21, no. 27 (2006): 5482–87. http://dx.doi.org/10.1142/s0217751x06034641.

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Heavy flavor baryons are attractive systems for testing effective theories for weak lifetime and decay systematics. Recently, new experimental results have mitigated one historic problem in the weak lifetime systematics and continued another. The charm baryon system continues to show new high mass, narrow states well isolated from one another. The spectroscopy of these states will challenge new advances in lattice gauge theoretic calculations of baryon structure. Double charm baryons still are seen only by SELEX, which showed a new [Formula: see text] candidate. High-sensitivity searches by BE

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Ryden, Barbara S., and James E. Gunn. "The Formation of Galactic Halos in Universes Dominated by Cold Dark Matter." Symposium - International Astronomical Union 117 (1987): 364. http://dx.doi.org/10.1017/s007418090015051x.

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If the universe is dominated by cold dark matter (CDM), had an inflationary phase, and has Ω = 1, then the spectrum of primordial density perturbations can be calculated. Using the spectrum calculated by J. Bardeen, we have found the structure of halos which form around peaks in the density. If the initial density is given by , where ) is a Gaussian process, then the mean run of density around a peak is proportional to the correlation function of . If the mass about a peak comes to equilibrium in near-circular orbits, the exact equilibrium configuration can be calculated. The resulting rotatio

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