Nuclear Theory·nucl-th

Friday·March 13, 2020

8 papers—4 primary·4 cross-listed

01
Effects of quark anomalous magnetic moment on the thermodynamical properties and mesonic excitations of magnetized hot and dense matter in PNJL model
Nilanjan Chaudhuri🇮🇳 · Snigdha Ghosh🇮🇳 · Sourav Sarkar🇮🇳 · Pradip Roy🇮🇳
Various thermodynamic quantities and the phase diagram of strongly interacting hot and dense magnetized quark matter are obtained with the $2$ -flavour Nambu-Jona-Lasinio model with Polyakov loop considering finite values of the anomalous magnetic moment (AMM) of the quarks. Susceptibilities associated with constituent quark mass and traced Polyakov loop are used to evaluate chiral and deconfinement transition temperatures. It is found that, inclusion of the AMM of the quarks in presence of the background magnetic field results in a substantial decrease in the chiral as well as deconfinement transition temperatures in contrast to an enhancement in the chiral transition temperature in its absence. Using standard techniques of finite temperature field theory, the two point thermo-magnetic mesonic correlation functions in the scalar ( $σ$ ) and neutral pseudoscalar ( $π^{0}$ ) channels are evaluated to calculate the masses of $σ$ and $π^{0}$ considering the AMM of the quarks.
nucl-thhep-phEPJA(2020)·46 citations
02
Dispersion (asymptotic) theory of charged particle transfer reactions at low energies and nuclear astrophysics: II. the asymptotic normalization coefficients and their nuclear-astrophysical application
R. Yarmukhamedov · K. I. Tursunmakhatov · N. Burtebayev
Within the asymptotic theory proposed by authors R. Yarmukhamedov and K.I. Tursunmakhatov [Phys. Rev. C (submitted 2019)] for the peripheral sub- and above-barrier transfer $A$ ( $x$ , $y$ ) $B$ reaction in the three-body ( $A$ , $a$ and $y$ ) model ( $x$ = $y$ + $a$ and $B$ = $A$ + $a$ , and $a$ is a transferred particle), the analysis of the experimental angular distributions of the differential cross sections is performed for the peripheral proton and triton transfer $^{9} Be (^{10} B,^{9} Be)^{10} B$ , $^{16} O (^{3} He, d)^{17} F$ and $^{19} F (p, α)^{16} O$ reactions at above-and sub-barrier projectile energies, respectively. New estimates and their uncertainties are obtained for magnitudes of the asymptotic normalization coefficients (respective the nuclear vertex constants) for $^{9} Be + p \to^{10} B$ , $^{16} O + p \to^{17} F$ and $^{16} O + t \to^{19} F$ . They are applied for calculations of the astrophysical $S$ factors for the nuclear-astrophysical $^{9} Be (p, γ)^{10} B$ , $^{16} O (p, γ)^{17} F$ and $^{19} F (p, α)^{16} O)$ reactions at thermonuclear energies. New values and their uncertainties are obtained for the astrophysical $S$ factors at stellar energies.
nucl-th0 citations
03
A collision geometry-based 3D initial condition for relativistic heavy-ion collisions
Chun Shen🇺🇸 · Sahr Alzhrani🇺🇸
We present a simple way to construct 3D initial conditions for relativistic heavy-ion collisions based on the Glauber collision geometry. Local energy and momentum conservation conditions are imposed to set non-trivial constraints on our parameterizations of longitudinal profiles for the system's initial energy density and flow velocity. After calibrating parameters with charged hadron rapidity distributions in central Au+Au collisions, we test model predictions for particle rapidity distributions in d+Au and peripheral Au+Au collisions in the Beam Energy Scan (BES) program at Relativistic Heavy-Ion Collider (RHIC). Simulations and comparisons with measurements are also made for Pb+Pb collisions at Super Proton Synchrotron (SPS) energies. We demonstrate that elliptic flow measurements in heavy-ion collisions at $s \sim 10$ GeV can set strong constraints on the dependence of Quark-Gluon Plasma shear viscosity on temperature and net baryon chemical potential.
nucl-thhep-phnucl-exPRC(2020)·144 citations
04
Benchmark calculations of electromagnetic sum rules with a symmetry-adapted basis and hyperspherical harmonics
R. B. Baker · K. D. Launey · S. Bacca · N. Nevo Dinur · T. Dytrych
We demonstrate the ability to calculate electromagnetic sum rules with the \textit{ab initio} symmetry-adapted no-core shell model. By implementing the Lanczos algorithm, we compute non-energy weighted, energy weighted, and inverse energy weighted sum rules for electric monopole, dipole, and quadrupole transitions in $^{4}$ He using realistic interactions. We benchmark the results with the hyperspherical harmonics method and show agreement within $2 σ$ , where the uncertainties are estimated from the use of the many-body technique. We investigate the dependence of the results on three different interactions, including chiral potentials, and we report on the $^{4}$ He electric dipole polarizability calculated in the SA-NCSM that reproduces the experimental data and earlier theoretical outcomes. We also detail a novel use of the Lawson procedure to remove the spurious center-of-mass contribution to the sum rules that arises from using laboratory-frame coordinates. We further show that this same technique can be applied in the Lorentz integral transform method, with a view toward studies of electromagnetic reactions for light through medium-mass nuclei.
nucl-thPRC(2020)·23 citations

Affiliations

first authorsco-authorsvia INSPIRE

Effects of quark anomalous magnetic moment on the thermodynamical properties and mesonic excitations of magnetized hot and dense matter in PNJL model

Dispersion (asymptotic) theory of charged particle transfer reactions at low energies and nuclear astrophysics: II. the asymptotic normalization coefficients and their nuclear-astrophysical application

A collision geometry-based 3D initial condition for relativistic heavy-ion collisions

Benchmark calculations of electromagnetic sum rules with a symmetry-adapted basis and hyperspherical harmonics

Affiliations