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Title: Impact of domain walls on the chiral magnetic effect in hot QCD matter

Abstract

The chiral magnetic effect (CME)—the separation of positive and negative electric charges along the direction of the external magnetic field in quark-gluon plasma and other topologically nontrivial media—is a consequence of the coupling of electrodynamics to the topological gluon field fluctuations that form metastable $CP$-odd domains. In phenomenological models it is usually assumed that the domains are uniform and the influence of the domain walls on the electric current flow is not essential. This article challenges the latter assumption. A simple model consisting of a uniform spherical domain in a uniform time-dependent magnetic field is introduced and analytically solved. It is shown that (i) no electric current flows into or out of the domain; (ii) the charge separation current, viz. the total electric current flowing inside the domain in the external field direction, is a dissipative Ohm current; (iii) the CME effect can be produced either by the anomalous current or by the boundary conditions on the domain wall; and (iv) the charge separation current oscillates in plasma long after the external field decays. These properties are qualitatively different from the CME in an infinite medium.

Authors:
 [1]
  1. Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Iowa State Univ., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1454660
Alternate Identifier(s):
OSTI ID: 1503829
Grant/Contract Number:  
FG02-87ER40371
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 97; Journal Issue: 6; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; anomalies; electromagnetic interactions; nuclear matter; quark-gluon plasma; chiral symmetry

Citation Formats

Tuchin, Kirill. Impact of domain walls on the chiral magnetic effect in hot QCD matter. United States: N. p., 2018. Web. doi:10.1103/physrevc.97.064914.
Tuchin, Kirill. Impact of domain walls on the chiral magnetic effect in hot QCD matter. United States. doi:10.1103/physrevc.97.064914.
Tuchin, Kirill. Mon . "Impact of domain walls on the chiral magnetic effect in hot QCD matter". United States. doi:10.1103/physrevc.97.064914.
@article{osti_1454660,
title = {Impact of domain walls on the chiral magnetic effect in hot QCD matter},
author = {Tuchin, Kirill},
abstractNote = {The chiral magnetic effect (CME)—the separation of positive and negative electric charges along the direction of the external magnetic field in quark-gluon plasma and other topologically nontrivial media—is a consequence of the coupling of electrodynamics to the topological gluon field fluctuations that form metastable $CP$-odd domains. In phenomenological models it is usually assumed that the domains are uniform and the influence of the domain walls on the electric current flow is not essential. This article challenges the latter assumption. A simple model consisting of a uniform spherical domain in a uniform time-dependent magnetic field is introduced and analytically solved. It is shown that (i) no electric current flows into or out of the domain; (ii) the charge separation current, viz. the total electric current flowing inside the domain in the external field direction, is a dissipative Ohm current; (iii) the CME effect can be produced either by the anomalous current or by the boundary conditions on the domain wall; and (iv) the charge separation current oscillates in plasma long after the external field decays. These properties are qualitatively different from the CME in an infinite medium.},
doi = {10.1103/physrevc.97.064914},
journal = {Physical Review C},
issn = {2469-9985},
number = 6,
volume = 97,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/physrevc.97.064914

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Cited by: 2 works
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