Nuclear Theory·nucl-th

Tuesday·February 21, 2017

19 papers—14 primary·5 cross-listed

01
[Submitted on 18 Feb 2017]
Alpha decay calculations with a new formula
D. T. Akrawy · D. N. Poenaru
A new semi-empirical formula for calculations of $α$ ~decay halflives is presented. It was derived from Royer relationship by introducing new parameters which are fixed by fit to a set of experimental data. We are using three sets: set A with 130 e-e (even-even), 119 e-o (even-odd), 109 o-e, and 96 o-o, set B with 188 e-e, 147 e-o, 131 o-e, and 114 o-o, and set C with 136 e-e, 84 e-o, 76 o-e, and 48 o-o alpha emitters. A comparison of results obtained with the new formula and the following well known relationships: semFIS (semiempirical based on fission theory), ASAF (analytical superAsymmetric fission) model, and UNIV (universal formula) is made in terms of rms standard deviation. We also introduced a weighted mean value of this quantity, allowing to compare the global properties of a given model. For the set B the order of the four models is the following: semFIS, UNIV, newF, and ASAF. Nevertheless for even-even alpha emitters UNIV gives the 2nd best result after semFIS, and for odd-even parents the 2nd is newF. Despite its simplicity in comparison with semFIS the new formula, presented in this article, behaves quite well, competing with the others well known relationships.
Comments:
20 pages, 3 figures
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1702.05598 [pdf]
J.Phys.G(2017)·91 citations
02
[Submitted on 19 Feb 2017]
The population of highly magnetized neutron stars
R.O. Gomes · V. Dexheimer · B. Franzon · S. Schramm
In this work, we study the effects of strong magnetic field configurations on the population of neutron stars. The stellar matter is described within a relativistic mean field formalism which considers many-body force contributions in the scalar couplings. We choose the parametrization of the model that reproduces nuclear matter properties at saturation and also describes massive hyperon stars. Hadronic matter is modeled at zero temperature, in beta-equilibrium, charge neutral and populated by the baryonic octet, electrons and muons. Magnetic effects are taken into account in the structure of stars by the solution of the Einstein-Maxwell equations with the assumption of a poloidal magnetic field distribution. Our results show that magnetic neutron stars are populated essencialy by nucleons and leptons, due to the fact that strong magnetic fields decrease the central density of stars and, hence, supress the appearance of exotic particles.
Comments:
Prepared for Conference "Compact Stars in the QCD phase diagram V" 23-27 May 2016 GSSI and LNGS (L'Aquila, Italy)
Subjects:
Nuclear Theory (nucl-th); Solar and Stellar Astrophysics (astro-ph.SR)
arXiv:
1702.05684 [pdf]
J.Phys.Conf.Ser.(2017)·1 citation
03
[Submitted on 19 Feb 2017]
Highly magnetized neutron stars in a many-body forces formalism
R.O. Gomes · B. Franzon · V. Dexheimer · S. Schramm · C.A.Z. Vasconcellos
In this work, we study the effects of different magnetic field configurations in neutron stars described by a many-body forces formalism (MBF model). The MBF model is a relativistic mean field formalism that takes into account many-body forces by means of a meson field dependence of the nuclear interaction coupling constants. We choose the best parametrization of the model that reproduces nuclear matter properties at saturation and also describes massive neutron stars. We assume matter to be in beta-equilibrium, charge neutral and at zero temperature. Magnetic fields are taken into account both in the equation of state and in the structure of the stars by the self-consistent solution of the Einstein-Maxwell equations. We assume a poloidal magnetic field distribution and calculate its effects on neutron stars, showing its influence on the gravitational mass and deformation of the stars.
Comments:
Contribution to the Proceedings of the VII International Workshop on Astronomy and Relativistic Astrophysics - IWARA 2016
Subjects:
Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE)
arXiv:
1702.05685 [pdf]
Int.J.Mod.Phys.Conf.Ser.(2017)·0 citations
04
[Submitted on 19 Feb 2017]
Oscillation Modes of Strange Quark Stars with a Strangelet Crust
Jessica Asbell🇺🇸 · Prashanth Jaikumar🇺🇸
We study the non-radial oscillation modes of strange quark stars with a homogeneous core and a crust made of strangelets. Using a 2-component equation of state (core+crust) for strange quark stars that can produce stars as heavy as 2 solar masses, we identify the high-frequency l=2 spheroidal (f, p) in Newtonian gravity, using the Cowling approximation. The results are compared to the case of homogeneous compact stars such as polytropic neutron stars, as well as bare strange stars. We find that the strangelet crust only increases very slightly the frequency of the spheroidal modes, and that Newtonian gravity overestimates the mode frequencies of the strange star, as is the case for neutron stars.
Comments:
8 pages, 6 figures. Contribution to Proceedings of CSQCD V (Compact Stars in the QCD Phase Diagram V, GSSI, L'Aquila, Italy)
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1702.05691 [pdf]
J.Phys.Conf.Ser.(2017)·14 citations
05
[Submitted on 19 Feb 2017]
Transport coefficients of a hot QCD medium and their relative significance in heavy-ion collisions
Sukanya Mitra🇮🇳 · Vinod Chandra🇮🇳
The main focus of this article is to obtain various transport coefficients for a hot QCD medium that is produced while colliding two heavy nuclei ultra-relativistically. As the hot QCD medium follows dissipative hydrodynamics while undergoing space-time evolution, the knowledge of the transport coefficients such as thermal conductivity, electrical conductivity, shear and bulk viscosities are essential to understand the underlying physics there. The approach adopted here is semi-classical transport theory. The determination of all these transport coefficients requires knowledge of the medium away from equilibrium. In this context, we setup the linearized transport equation employing the Chapman-Enskog technique from kinetic theory of many particle system with a collision term that includes the binary collisions of quarks/antiquarks and gluons. In order to include the effects of a strongly interacting, thermal medium, a quasi-particle description of realistic hot QCD equation of state has been employed through the equilibrium modeling of the momentum distributions of gluons and quarks with non-trivial dispersion relations while extending the model for finite but small quark chemical potential. The effective coupling for strong interaction has been redefined following the charge renormalization under the scheme of the quasiparticle model. The consolidated effects on transport coefficients are seen to have significant impact on their temperature dependence. The relative significances of momentum and heat transfer as well as charge diffusion processes in hot QCD have been investigated by studying the ratios of the respective transport coefficients.
Comments:
1+52 pages, 10 figures
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1702.05728 [pdf]
PRD(2017)·71 citations
06
[Submitted on 19 Feb 2017]
Strange hadron production in pp, pPb and PbPb collisions at LHC energies
Kapil Saraswat🇮🇳 · Prashant Shukla🇮🇳 · Vineet Kumar🇮🇳 · Venktesh Singh🇮🇳
We present a systematic analysis of transverse momentum $(p_{T})$ spectra of the strange hadrons in different multiplicity events produced in pp collision at $s$ = 7 TeV, pPb collision at $s_{N N}$ = 5.02 TeV and PbPb collision at $s_{N N}$ = 2.76 TeV. Both the single and differential freeze out scenarios of strange hadrons $K_{s}^{0}$ , $Λ$ and $Ξ^{-}$ are considered while fitting using a Tsallis distribution which is modified to include transverse flow. The $p_{T}$ distributions of these hadrons in different systems are characterized in terms of the parameters namely, Tsallis temperature $(T)$ , power $(n)$ and average transverse flow velocity $(β)$ . It is found that for all the systems, transverse flow increases as we move from lower to higher multiplicity events. In the case of the differential freeze-out scenario, the degree of thermalization remains similar for events of different multiplicity classes in all the three systems. The Tsallis temperature increases with the mass of the hadrons and also increases with the event multiplicity in pp and pPb system but shows little variation with the multiplicity in PbPb system. In the case of the single freeze-out scenario, the difference between small systems (pp, pPb) and PbPb system becomes more evident. The high multiplicity PbPb events show higher degree of thermalization as compared to the events of pp and pPb systems. The trend of variation of the temperature in PbPb system with event multiplicity is opposite to what is found in the pp and pPb systems.
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1702.05734 [pdf]
EPJA(2017)·7 citations
07
[Submitted on 20 Feb 2017]
Event-by-Event Simulations of Jet Modification Using the MATTER Event Generator
Michael Kordell II🇺🇸 · Abhijit Majumder🇺🇸
The modification of hard jets in the Quark Gluon Plasma (QGP) is studied using the MATTER event generator. Based on the higher twist formalism of energy loss, the MATTER event generator simulates the evolution of highly virtual partons through a medium. These partons sampled from an underlying PYTHIA kernel undergo splitting through a combination of vacuum and medium induced emission. The momentum exchange with the medium is simulated via the jet transport coefficient $q^$ , which is assumed to scale with the entropy density at a given location in the medium. The entropy density is obtained from a relativistic viscous fluid dynamics simulation (VISH2+1D) in 2+1 space time dimensions. Results for jet and hadron observables are presented using an independent fragmentation model. These proceedings will focus on the physics input and simulation details of the MATTER event generator as compared to a variety of test observables.
Comments:
4 pages, 3 figures, To be included in Hard Probes 2016 Proceedings; references updated
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1702.05862 [pdf]
6 citations
08
[Submitted on 20 Feb 2017]
Equation of state for hybrid stars with strangeness
Tsuyoshi Miyatsu🇯🇵 · Takahide Kambe🇯🇵 · Koichi Saito🇯🇵
Considering the mass constraint from the resent pulsar observations, we study the properties of neutron stars including hyperons and quarks explicitly. Using the chiral quark-meson coupling model with relativistic Hartree-Fock approximation, the equation of state (EoS) for hadronic matter is calculated by taking into account the strange ( $σ^{*}$ and $ϕ$ ) mesons as well as the light non-strange ( $σ$ , $ω$ , $ρ$ , and $π$ ) mesons in SU(3) flavor symmetry. On the other hand, the EoS for quark matter is constructed with the simple MIT bag or the flavor-SU(3) Nambu-Jona-Lasinio model, and we investigate the effect of the hadron-quark coexistence on the neutron-star properties, imposing smooth crossover or Gibbs criterion for chemical equilibrium. The mass-radius relation of a neutron star, as well as physical quantities such as EoSs, particle fractions, and the speed of sound in matter are presented. We find that, in order to prevent the quark appearance at very low densities, the stiff hadronic EoS should be required under both of the hadron-quark crossover and the first-order phase transition.
Comments:
8 pages, 7 figures, Proceedings of the 26th International Nuclear Physics Conference (INPC2016), Adelaide, Australia, 11-16 Sep 2016
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1702.05871 [pdf]
PoS(2017)·4 citations
09
[Submitted on 20 Feb 2017]
Virtual photon polarization in ultrarelativistic heavy-ion collisions
Gordon Baym🇺🇸 · Tetsuo Hatsuda🇯🇵 · Michael Strickland🇺🇸
The polarization of direct photons produced in an ultrarelativistic heavy-ion collision reflects the momentum anisotropy of the quark-gluon plasma created in the collision. This paper presents a general framework, based on the photon spectral functions in the plasma, for analyzing the angular distribution and thus the polarization of dileptons in terms of the plasma momentum anisotropies. The rates of dilepton production depend, in general, on four independent spectral functions, corresponding to two transverse polarizations, one longitudinal polarization, and -- in plasmas in which the momentum anisotropy is not invariant under parity in the local rest frame of the matter -- a new spectral function, $ρ_{n}$ , related to the anisotropy direction in the collision. The momentum anisotropy appears in the difference of the two transverse spectral functions, as well as in $ρ_{n}$ . As an illustration, we delineate the spectral functions for dilepton pairs produced in the lowest order Drell-Yan process of quark-antiquark annihilation to a virtual photon.
Comments:
6 pages, 3 figures
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1702.05906 [pdf]
PRC(2017)·24 citations
10
[Submitted on 20 Feb 2017]
Study of corrections to the eikonal approximation
Chloë Hebborn · Pierre Capel
For the last decades, multiple international facilities have developed Radioactive-Ion Beams (RIB) to measure reaction processes including exotic nuclei. These measurements coupled with an accurate theoretical model of the reaction enable us to infer information about the structure of these nuclei. The partial-wave expansion provides a precise description of two-body collisions but has a large computational cost. To cope with this issue, the eikonal approximation is a powerful tool as it reduces the computational time and still describes the quantum effects observed in reaction observables. However, its range of validity is restricted to high energy and to forward scattering angles. In this work, we analyse the extension of the eikonal approximation to lower energies and larger angles through the implementation of two corrections. These aim to improve the treatment of the nuclear and Coulomb interactions within the eikonal model. The first correction is based on an expansion of the $T$ -matrix while the second relies on a semi-classical approach. They permit to better account for the deflection of the projectile by the target, which is neglected in the standard eikonal model. The gain in accuracy of each correction is evaluated through the analyses of angular cross sections computed with the standard eikonal model, its corrections and the partial-wave expansion. These analyses have been performed for tightly bound projectiles ( $^{10} Be$ ) from intermediate energies (67 MeV/nucleon) down to energies of interest of future RIB facilities such as HIE-ISOLDE and ReA12 at MSU (10 MeV/nucleon).
Comments:
7 pages, 2 figures, contribution to 55th International Winter Meeting on Nuclear Physics (January 2017, Bormio, Italy)
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1702.05928 [pdf]
PoS(2017)·0 citations
11
[Submitted on 20 Feb 2017]
Decay angular distributions of $K^{*}$ and $D^{*}$ vector mesons in pion-nucleon scattering
Sang-Ho Kim🇰🇷 · Yongseok Oh🇰🇷 · Alexander I Titov🇷🇺
The production mechanisms of open strangeness ( $K^{*}$ ) and open charm ( $D^{*}$ ) vector mesons in $π^{-} p$ scattering, namely, $π^{-} + p \to K^{* 0} + Λ$ and $π^{-} + p \to D^{*-} + Λ_{c}^{+}$ , are investigated within the modified quark-gluon string model. In order to identify the major reaction mechanisms, we consider the subsequent decays of the produced vector mesons into two pseudoscalar mesons, i.e., $K^{*} \to K + π$ and $D^{*} \to D + π$ . We found that the decay distributions and density matrix elements are sensitive to the production mechanisms and can be used to disentangle the vector trajectory and pseudoscalar trajectory exchange models. Our results for $K^{*}$ production are compared with the currently available experimental data and the predictions for $D^{*}$ production processes are presented as well. Our predictions can be tested at the present or planned experimental facilities.
Comments:
10 pages, 9 figures, REVTeX
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1702.05929 [pdf]
PRC(2017)·9 citations
12
[Submitted on 20 Feb 2017]
Fission dynamics of $^{252}$ Cf
A. Zdeb · A. Dobrowolski · M. Warda
The time-dependent generator coordinate method with the gaussian overlap approximation (TDGCM+GOA) formalism is applied to describe the fission of $^{252}$ Cf. We perform analysis of fission from the initial states laying in the energetic range from the ground state to the state located 4 MeV above the fission barrier. The fission fragment mass distributions, obtained for different parity, energy of levels and types of mixed states, are calculated and compared with experimental data. The impact of the total time of wave packet propagation on the final results is studied as well. The weak dependence of obtained mass yields on the initial conditions is shown.
Comments:
7 pages, 7 figures
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1702.05938 [pdf]
PRC(2017)·38 citations
13
[Submitted on 14 Feb 2017]
Study of charged particle production in $U$ - $U$ collisions in a Wounded Quark Model
O. S. K. Chaturvedi🇮🇳 · P. K. Srivastava🇮🇳 · Ashwini Kumar🇮🇳 · B. K. Singh🇮🇳
Recently, there has been a growing interest in the study of deformed uranium-uranium ( $U$ - $U$ ) collisions in its various geometrical configurations due to their usefulness in understanding the different aspects of quantum chromodynamics (QCD). In this paper we have studied the particle production in deformed $U$ - $U$ collisions at $s_{N N}$ = $193$ GeV using modified wounded quark model (WQM). At first, we have shown the variation of quark-nucleus inelastic scattering cross-section ( $σ_{q A}^{in}$ ) with respect to centralities for various geometrical orientations of $U$ - $U$ collisions in WQM. After that we have calculated the pseudorapidity density ( $d n_{c h} / d η$ ) within WQM using two-component prescription. Further we have calculated the transverse energy density distribution ( $d E_{T} / d η$ ) along with the ratio of transverse energy to charged hadron multiplicity ( $E_{T} / N_{c h}$ ) for $U$ - $U$ collisions and compared them with the corresponding experimental data. We have shown the scaling behavior of $d n_{c h} / d η$ and $d E_{T} / d η$ for different initial geometry of $U$ - $U$ collision with respect to $p$ - $p$ data at $s_{N N} = 200$ GeV. Furthermore we have shown the Bjorken energy density achieved in $U$ - $U$ collisions for various configurations and compared them with experimental data of $A u$ - $A u$ at 200 GeV. We observe that the present model suitably describes the experimental data for minimum bias geometrical configuration of $U$ - $U$ collisions. An estimate for various observables in different initial geometries of $U$ - $U$ collisions is also presented which will be tested in future by experimental data.
Comments:
23 pages, 12 figures, Accepted in EPJ Plus
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1702.06008 [pdf]
Eur.Phys.J.Plus(2017)·9 citations
14
[Submitted on 20 Feb 2017]
Off-shell persistence of composite pions and kaons
Si-Xue Qin🇺🇸 · Chen Chen🇧🇷 · Cedric Mezrag🇺🇸 · Craig D. Roberts🇺🇸
In order for a Sullivan-like process to provide reliable access to a meson target as $t$ becomes spacelike, the pole associated with that meson should remain the dominant feature of the quark-antiquark scattering matrix and the wave function describing the related correlation must evolve slowly and smoothly. Using continuum methods for the strong-interaction bound-state problem, we explore and delineate the circumstances under which these conditions are satisfied: for the pion, this requires $- t ≲ 0.6$ GeV $^{2}$ , whereas $- t ≲ 0.9$ GeV $^{2}$ will suffice for the kaon. These results should prove useful in evaluating the potential of numerous experiments at existing and proposed facilities.
Comments:
6 pages, 5 figures
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
arXiv:
1702.06100 [pdf]
PRC(2018)·48 citations
15
[Submitted on 17 Feb 2017] (cross-list from hep-ph)
NRQCD Confronts LHCb Data on Quarkonium Production within Jets
Reggie Bain🇺🇸 · Lin Dai🇺🇸 · Adam Leibovich🇺🇸 · Yiannis Makris🇺🇸 · Thomas Mehen🇺🇸
We analyze the recent LHCb measurement of the distribution of the fraction of the transverse momentum, $z (J / ψ)$ , carried by the $J / ψ$ within a jet. LHCb data is compared to analytic calculations using the fragmenting jet function (FJF) formalism for studying $J / ψ$ in jets. Logarithms in the FJFs are resummed using DGLAP evolution. We also convolve hard QCD partonic cross sections, showered with PYTHIA, with leading order Non Relativistic Quantum Chromodynamics (NRQCD) fragmentation functions and obtain consistent results. Both approaches use Madgraph to calculate the hard process that creates the jet initiating parton. These calculations give reasonable agreement with the $z (J / ψ)$ distribution that was shown to be poorly described by default PYTHIA simulations in the LHCb paper. We compare our predictions for the $J / ψ$ distribution using various extractions of nonperturbative NRQCD long-distance matrix elements (LDMEs) in the literature. NRQCD calculations agree with LHCb data better than default PYTHIA regardless of which fit to the LDMEs is used. LDMEs from fits that focus exclusively on high transverse momentum data from colliders are in good agreement with the LHCb measurement.
Comments:
5 pages, 2 figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1702.05525 [pdf]
PRL(2017)·84 citations
16
[Submitted on 18 Feb 2017] (cross-list from astro-ph.HE)
Rotation-driven phase transitions in the cores of pulsars
R. D. Mellinger🇺🇸 · F. Weber🇺🇸 · W. Spinella🇺🇸 · G. A. Contrera🇦🇷 · M. Orsaria🇺🇸
In this paper, we discuss the impact of rotation on the particle composition of rotating neutron stars (pulsars). Particular emphasis is put on the formation of quark matter during stellar spin-down, driven by continuous gravitational compression. Our study is based on modern models for the nuclear equation of state whose parameters are tightly constrained by nuclear data, neutron star masses, and the latest estimates of neutron star radii.
Comments:
7 pages, 5 figures; Paper presented at the 7th International Workshop on Astronomy and Relativistic Astrophysics, Gramado, Rio Grande do Sul, Brazil, October 9 - 13, 2016
Subjects:
High Energy Astrophysical Phenomena (astro-ph.HE); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1702.05549 [pdf]
Int.J.Mod.Phys.Conf.Ser.(2017)·0 citations
17
[Submitted on 19 Feb 2017] (cross-list from hep-ph)
Energy loss of heavy quarks and $B$ and $D$ meson spectra in PbPb collisions at LHC energies
Kapil Saraswat🇮🇳 · Prashant Shukla🇮🇳 · Vineet Kumar🇮🇳 · Venktesh Singh🇮🇳
We study the production and evolution of charm and bottom quarks in hot partonic medium produced in heavy ion collisions. The heavy quarks loose energy in the medium which is reflected in the transverse momentum spectra of heavy mesons. The collisional energy loss of heavy quarks has been calculated using QCD calculations. The radiative energy loss is obtained using two models namely reaction operator formalism and generalized dead cone approach. The nuclear modification factors, $R_{AA}$ as a function of transverse momentum by including shadowing and energy loss are calculated for $D^{0}$ and $B^{+}$ mesons in PbPb collisions at $s_{N N}$ = 5.02 TeV and for $D^{0}$ mesons at $s_{N N}$ = 2.76 TeV and are compared with the recent measurements. The radiative energy loss from generalized dead cone approach alone is sufficient to produce measured $D^{0}$ meson $R_{AA}$ at both the LHC energies. The radiative energy loss from reaction operator formalism plus collisional energy loss gives good description of $D^{0}$ meson $R_{AA}$ . For the case of $B^{+}$ meson, the radiative energy loss from generalized dead cone approach plus collisional energy loss gives good description of the CMS data. The radiative process is dominant for charm quarks while for the bottom, both the radiative process and the elastic collisions are important.
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1702.05733 [pdf]
NPA(2017)·16 citations
18
[Submitted on 20 Feb 2017] (cross-list from nucl-ex)
Photoproduction of $η$ and $η^{'}$ Mesons on Proton
V.L. Kashevarov🇩🇪 · L. Tiator🇩🇪 · M. Ostrick (for the A2 Collaboration at MAMI)🇩🇪
New high-precision total and differential cross sections for $η$ and $η^{'}$ photoproduction on the proton obtained by the A2 Collaboration at the Mainz Microtron are presented. The data for $η$ photoproduction demonstrate a cusp at the energy W $\sim$ 1.9~GeV. Furthermore, we present a new version of the $η$ MAID model for $η$ and $η^{'}$ photoproduction. The model includes 23 nucleon resonances parametrized with Breit-Wigner shapes. The background is described by vector and axial-vector meson exchanges in the $t$ channel using the Regge phenomenology. Parameters of the resonances were obtained from a fit to preliminary data of the A2 Collaboration at MAMI and available data from other collaborations. The cusp is explained as a threshold effect due to the opening $η^{'} p$ decay channel of the $N (1895) 1/ 2^{-}$ resonance.
Comments:
5 pages, 5 figures, 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016), Kyoto, Japan
Subjects:
Nuclear Experiment (nucl-ex); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1702.06060 [pdf]
JPS Conf.Proc.(2017)·10 citations
19
[Submitted on 20 Feb 2017] (cross-list from astro-ph.HE)
Quark-hadron Phase Transition in Proto-Neutron Stars Cores based on a Non-local NJL Model
German Malfatti🇦🇷 · G. A. Contrera🇦🇷 · M. Orsaria🇦🇷 · F. Weber🇺🇸
We study the QCD phase diagram using a non-local SU(3) NJL model with vector interactions among quarks. We analyze several thermodynamic quantities such as entropy and specific heat, and study the influence of vector interactions on the thermodynamic properties of quark matter. Upon imposing electric charge neutrality and baryon number conservation on the field equations, we compute models for the equation of state of the inner cores of proto-neutron stars providing a non-local treatment of quark matter for astrophysics.
Comments:
4 pages, 2 figures. Contribution to the Proceedings of the VII International Workshop on Astronomy and Relativistic Astrophysics - IWARA 2016
Subjects:
High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
arXiv:
1702.06114 [pdf]
Int.J.Mod.Phys.Conf.Ser.(2017)·3 citations

Affiliations

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