Nuclear Theory·nucl-th

Tuesday·September 22, 2020

9 papers—5 primary·4 cross-listed

06
[Submitted on 20 Sept 2020] (cross-list from hep-ph)
Chiral Symmetry Restoration and Deconfinement in the Contact Interaction Model of Quarks with a Parallel Electric and Magnetic Fields
Aftab Ahmad🇵🇰
We study the impact of steady, homogeneous, and external parallel electric and magnetic field strength ( $e E ∥ e B$ ), on the chiral symmetry breaking-restoration and confinement-deconfinement phase transitions. We also sketch the phase diagram of quantum chromodynamics (QCD) at finite temperature $T$ and in the presence of background fields. Our unified formalism for this study is based on the Schwinger-Dyson equations, symmetry preserving vector-vector contact interaction model of quarks, and the proper time regularization scheme. At $T = 0$ , in the purely magnetic case ( $e E \to 0$ ), we observe the well known magnetic catalysis effect. On the other hand, in the pure electric field background ( $e B \to 0$ ), the electric field tends to restore the chiral symmetry and deconfinement above the pseudo-critical electric field $e E_{c}^{χ, C}$ . In the presence of both $e E$ and $e B$ : we find the magnetic catalysis effect in the particular region where $e B$ dominates over $e E$ , whereas, we observe the chiral inhibition (or electric chiral rotation) effect, when $e E$ stand over $e B$ . At finite $T$ , in the pure electric field case, the phenomenon of inverse electric catalysis appears to exist in our model. On the other hand for pure magnetic field background, we notice the magnetic catalysis effect in the mean-field approximation and inverse magnetic catalysis with $e B$ -dependent coupling. The combined effect of both $e E$ and $e B$ on the pseudo-critical $T_{c}^{χ, C}$ yields the inverse electromagnetic catalysis, with and without $e B -$ dependent effective coupling of the model. Our findings are satisfactory in agreement with already predicted results by lattice simulations and other reliable effective models of QCD.
Comments:
11 pages, 21 figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2009.09482 [pdf]
CPC(2021)·12 citations
07
[Submitted on 21 Sept 2020] (cross-list from hep-ph)
Flow coefficients in O-O Al-Al and Cu-Cu collisions at 200 GeV in the fusing color string model
M.A. Braun🇷🇺 · C. Pajares🇪🇸
In view of the planning experiments for collisions of light nuclei at RHIC the flow coefficients for O-O, Al-AL and Cu-Cu collisions are studied in the color string percolation model. Our results for $v_{2}$ are somewhat smaller than predicted by other groups although with the same dependence on centrality. Our obtained $v_{3}$ lie between predictions of other groups.
Comments:
11 pages, 4 figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2009.09667 [pdf]
PRC(2021)·0 citations
08
[Submitted on 21 Sept 2020] (cross-list from nucl-ex)
Comment on "A sensitivity study of the primary correlators used to characterize chiral-magnetically-driven charge separation'' by Magdy, Nie, Ma, and Lacey
Yicheng Feng🇺🇸 · Fuqiang Wang🇺🇸 · Jie Zhao🇺🇸
This note points out an apparent error in the publication Phys.~Lett.~B {\bf 809} (2020) 135771 by Magdy, Nie, Ma, and Lacey.
Comments:
3 pages, 1 figure, 1 table
Subjects:
Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2009.10057 [pdf]
1 citation
09
[Submitted on 21 Sept 2020] (cross-list from astro-ph.HE)
Near-critical supernova outflows and their neutrino signatures
Alexander Friedland (SLAC)🇺🇸 · Payel Mukhopadhyay (SLAC and Stanford U.)🇺🇸
We demonstrate that the neutrino-driven outflows inside exploding core-collapse supernovae possess a special property of near-criticality, that is, they are on the edge of forming termination shocks. We derive a novel criterion for the formation of the shock, in terms of the fundamental parameters of the problem: the neutrino luminosity and energy as well as the properties of the protoneutron star. The criterion provides a unified description of the available numerical results and motivates future simulations. The property of near-criticality makes the neutrino signatures of the termination shocks a sensitive diagnostic of the physical conditions around the PNS several seconds into the explosion. The expected signal at DUNE is found to be statistically significant.
Comments:
14 pages, 6 figures, updated version published in Phys. Lett. B
Subjects:
High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2009.10059 [pdf]
PLB(2022)·16 citations

Affiliations

first authorsco-authorsvia INSPIRE

Chiral Symmetry Restoration and Deconfinement in the Contact Interaction Model of Quarks with a Parallel Electric and Magnetic Fields

Flow coefficients in O-O Al-Al and Cu-Cu collisions at 200 GeV in the fusing color string model

Comment on "A sensitivity study of the primary correlators used to characterize chiral-magnetically-driven charge separation'' by Magdy, Nie, Ma, and Lacey

Near-critical supernova outflows and their neutrino signatures

Affiliations