Nuclear Theory·nucl-th

Monday·May 24, 2021

9 papers—4 primary·5 cross-listed

01
[Submitted on 21 May 2021]
Quasi-elastic electron scattering with KIDS nuclear energy density functional
Hana Gil🇰🇷 · Chang Ho Hyun🇰🇷 · Kyungsik Kim🇰🇷
Isoscalar and isovector effective masses of the nucleon in nuclear medium are explored in the quasi-elastic electron scattering of nuclei with KIDS (Korea-IBS-Daegu-SKKU) density functional model. Effective masses are varied in the range (0.7 ~ 1.0) $M$ where $M$ is the mass of the nucleon in free space. Parameters in the KIDS functional are adjusted to nuclear matter equation of state, energy and radius of selected nuclei, and effective mass of nucleons. Hartree-Fock equation is solved to obtain the wave functions of the nucleon in target nuclei, and they are plugged in the calculation of electron-nucleus scattering cross sections at the energies of incident electrons 300 MeV ~ 2.5 GeV. Theoretical prediction agrees well with measurement. Dependence on the effective mass is evident: cross section tends to increase with small isoscalar effective masses. However, effect of isovector effective mass is negligible. Spectroscopic factors are estimated for the protons in the outermost shells of $^{16}$ O, $^{40}$ Ca, and $^{208}$ Pb. Results are consistent with the values in the literature.
Comments:
20 pages, 9 figures
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
2105.10136 [pdf]
PRC(2021)·17 citations
02
[Submitted on 21 May 2021]
Sensitivity study of \emph{r}-process abundances to nuclear masses
Xiao-Fei Jiang🇨🇳 · Xin-Hui Wu🇨🇳 · Peng-Wei Zhao🇨🇳
The impact of nuclear mass uncertainties on the \emph{r}-process abundances has been systematically studied with the classical \emph{r}-process model by varying the mass of every individual nucleus in the range of $\pm 0.1$ to $\pm 3.0 MeV$ based on six different mass models. A new quantitative relation between the uncertainties of \emph{r}-process abundances and those of the nuclear masses is extracted, i.e., a mass uncertainty of $\pm 0.5 MeV$ would lead to an abundance uncertainty of a factor around 2.5. It is found that this conclusion holds true for various mass models.
Comments:
13 pages, 4 figures
Subjects:
Nuclear Theory (nucl-th); Solar and Stellar Astrophysics (astro-ph.SR)
arXiv:
2105.10218 [pdf]
ApJ(2021)·33 citations
03
[Submitted on 21 May 2021]
Double strangeness $Ξ^{-}$ production as a probe of nuclear equation of state at high densities
Gao-Chan Yong🇨🇳 · Zhi-Gang Xiao🇨🇳 · Yuan Gao🇨🇳 · Zi-Wei Lin🇺🇸
Double strangeness $Ξ^{-}$ production in Au+Au collisions at 2, 4, and 6 GeV/nucleon incident beam energies is studied with the pure hadron cascade version of a multi-phase transport model. It is found that due to larger nuclear compression, the model with the soft equation of state (EoS) gives larger yields of both single strangeness ( $K^{+}$ and $Λ + Σ^{0}$ ) and double strangeness $Ξ^{-}$ . The sensitivity of the double strangeness $Ξ^{-}$ to the EoS is evidently larger than that of $K^{+}$ or $Λ + Σ^{0}$ since the phase-space distribution of produced $Ξ^{-}$ is more compact compared to those of the single strangeness. The larger sensitivity of the yields ratio of $Ξ^{-}$ to the EoS from heavy and light systems is kept compared to that of the single strangeness. The study of $Ξ^{-}$ production in relativistic heavy-ion collisions provides an alternative for the ongoing heavy-ion collision program at facilities worldwide for identifying the EoS at high densities, which is relevant to the investigation of the phase boundary and onset of deconfinement of dense nuclear matter.
Comments:
5 pages, 5 figures, PLB, in production
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
2105.10284 [pdf]
PLB(2021)·26 citations
04
[Submitted on 21 May 2021]
Quark Nova with the Producing of Color-Flavor Locked Quark Matter
Jia-Rui Guo🇨🇳
In this paper, we suggest that the process in quark nova explosion may exist widely in various kinds of supernova, although it only happens in a small part in the core in most cases. And the contribution to the energy releasing of whole supernova explosion can also be provided by QCD interacting term. In this way we derive a general equation of energy quantity to be released in quark nova process related to several parameters. After quark nova explosion process, the remnant can be a quark star, or a neutron star with quark matter core if this process only happens in a small part inside the compact star instead of a "full" quark nova. We will also use a more generalized approach to analyse the strangelets released from quark nova and will draw a possible interpretation of why effects caused by strangelets have not been observed yet. Our result suggests that the ordinary matter can only spontaneously transform into strange quark matter by crushing them into high pressure under the extreme condition in compact star, although generally the reaction would really be exergonic.
Comments:
15pages,3figures;Some inappropriate expressions have been corrected
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
2105.10374 [pdf]
0 citations
05
[Submitted on 17 May 2021] (cross-list from hep-ph)
Heavy quark potential in quark-gluon Plasma: Deep neural network meets lattice quantum chromodynamics
Shuzhe Shi🇨🇦 · Kai Zhou🇩🇪 · Jiaxing Zhao🇨🇳 · Swagato Mukherjee🇺🇸 · Pengfei Zhuang🇨🇳
Bottomonium states are key probes for experimental studies of the quark-gluon plasma (QGP) created in high-energy nuclear collisions. Theoretical models of bottomonium productions in high-energy nuclear collisions rely on the in-medium interactions between the bottom and antibottom quarks. The latter can be characterized by the temperature ( $T$ ) dependent potential, with real ( $V_{R} (T, r)$ ) and imaginary ( $V_{I} (T, r)$ ) parts, as a function of the spatial separation ( $r$ ). Recently, the masses and thermal widths of up to $3 S$ and $2 P$ bottomonium states in QGP were calculated using lattice quantum chromodynamics (LQCD). Starting from these LQCD results and through a novel application of deep neural network, here, we obtain $V_{R} (T, r)$ and $V_{I} (T, r)$ in a model-independent fashion. The temperature dependence of $V_{R} (T, r)$ was found to be very mild between $T \approx 0 - 334$ ~MeV. For $T = 151 - 334$ ~MeV, $V_{I} (T, r)$ shows a rapid increase with $T$ and $r$ , which is much larger than the perturbation-theory-based expectations.
Comments:
16 pages, 10 figures; Published version; Data for plots enclosed
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2105.07862 [pdf]
PRD(2022)·74 citations
06
[Submitted on 17 May 2021] (cross-list from astro-ph.HE)
Diffusion as a leading dissipative mechanism in superconducting neutron stars
K.Y. Kraav🇷🇺 · M.E. Gusakov🇷🇺 · E.M. Kantor🇷🇺
Despite the fact that different particle species can diffuse with respect to each other in neutron star (NS) cores, the effect of particle diffusion on various phenomena associated with NS oscillations is usually ignored. Here we demonstrate that the diffusion can be extremely powerful dissipative mechanism in superconducting NSs. In particular, it can be much more efficient than the shear and bulk viscosities. This result has important implications for the damping times of NS oscillations, development and saturation of dynamical instabilities in NSs, and for the excitation and coupling of oscillation modes during the late inspiral of binary NSs.
Comments:
6 pages, 3 figures, version accepted for publication in MNRAS Letters
Subjects:
High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); Nuclear Theory (nucl-th)
arXiv:
2105.08121 [pdf]
MNRAS(2021)·10 citations
07
[Submitted on 21 May 2021] (cross-list from hep-ph)
Azimuthal correlations in diffractive scattering at the Electron-Ion Collider
Adrian Dumitru🇺🇸 · Heikki Mäntysaari🇫🇮 · Risto Paatelainen🇫🇮 · Kaushik Roy🇩🇪 · Farid Salazar🇺🇸 · Björn Schenke🇺🇸
We calculate azimuthal correlations between the exclusively produced vector meson and the scattered electron in Deep Inelastic Scattering processes at the future Electron-Ion Collider (EIC). We identify "kinematical" and "intrinsic" contributions to these correlations, and show that the correlations are sensitive to the non-trivial correlations in the gluon distribution of the target. Realistic predictions at the EIC kinematics are provided using two different approaches to describe the dipole-proton interaction at relatively small $x$ .
Comments:
Contribution to the proceedings of DIS 2021, to be submitted to SciPost Proceedings
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2105.10144 [pdf]
SciPost Phys.Proc.(2022)·5 citations
08
[Submitted on 21 May 2021] (cross-list from hep-th)
Positive magnetoresistance induced by hydrodynamic fluctuations in chiral media
Noriyuki Sogabe🇨🇳 · Naoki Yamamoto🇯🇵 · Yi Yin🇨🇳
We analyze the combined effects of hydrodynamic fluctuations and chiral magnetic effect (CME) for a chiral medium in the presence of a background magnetic field. Based on the recently developed non-equilibrium effective field theory, we show fluctuations give rise to a CME-related positive contribution to magnetoresistance, while the early studies without accounting for the fluctuations find a CME-related negative magnetoresistance. At zero axial relaxation rate, the fluctuations contribute to the transverse conductivity in addition to the longitudinal one.
Comments:
31 pages, 3 figures, published version
Subjects:
High Energy Physics — Theory (hep-th); Strongly Correlated Electrons (cond-mat.str-el); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2105.10271 [pdf]
JHEP(2021)·8 citations
09
[Submitted on 21 May 2021] (cross-list from nucl-ex)
Nucleon-Nucleon Interaction ib the Singlet State at Low Energy
S. B. Borzakov🇷🇺
It is possible to describe the scattering and the radiative capture with help of a Breit-Wigner resonance with negative energy.
Subjects:
Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2105.10286 [pdf]
2 citations

Affiliations

first authorsco-authorsvia INSPIRE