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Title: Hydrodynamics with chiral anomaly and charge separation in relativistic heavy ion collisions

Matter with chiral fermions is microscopically described by theory with quantum anomaly and macroscopically described (at low energy) by anomalous hydrodynamics. For such systems in the presence of external magnetic field and chirality imbalance, a charge current is generated along the magnetic field direction ₋ a phenomenon known as the Chiral Magnetic Effect (CME). The quark- gluon plasma created in relativistic heavy ion collisions provides an (approximate) example, for which the CME predicts a charge separation perpendicular to the collisional reaction plane. Charge correlation measurements designed for the search of such signal have been done at RHIC and the LHC for which the interpretations, however, remain unclear due to contamination by background effects that are collective flow driven, theoretically poorly constrained, and experimentally hard to separate. Using anomalous (and viscous) hydrodynamic simulations, we make a first attempt at quantifying contributions to observed charge correlations from both CME and background effects in one and same framework. We discuss the implications for the search of CME.
Authors:
ORCiD logo [1] ;  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
  2. Indiana Univ., Bloomington, IN (United States). Physics Dept. and Center for Exploration of Energy and Matter; Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center
Publication Date:
OSTI Identifier:
1240207
Report Number(s):
BNL-108043-2016-JA
Journal ID: ISSN 0370-2693; R&D Project: PO-3
Grant/Contract Number:
SC0012704; AC02-98CH10886; PHY-1352368
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 756; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Chiral Magnetic Effect (CME); Heavy Ion Collision