skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Status of the chiral magnetic effect and collisions of isobars

Abstract

Here, we examine the current theoretical and experimental status of the chiral magnetic effect. We discuss possible future strategies for resolving uncertainties in interpretation including recommendations for theoretical work, recommendations for measurements based on data collected in the past five years, and recommendations for beam use in the coming years of RHIC. We then investigate the case for colliding nuclear isobars (nuclei with the same mass but different charge) and find the case compelling. We recommend that a program of nuclear isobar collisions to isolate the chiral magnetic effect from background sources be placed as a high priority item in the strategy for completing the RHIC mission.

Authors:
 [1];  [2];  [3];  [2];  [1];  [4];  [5];  [6]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
  2. Univ. of Washington, Seattle, WA (United States). Dept. of Physics
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center
  4. Wayne State Univ., Detroit, MI (United States)
  5. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center; Univ. of Illinois, Chicago, IL (United States). Dept. of Physics
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1399665
Report Number(s):
BNL-114358-2017-JA
Journal ID: ISSN 1674-1137; TRN: US1702848
Grant/Contract Number:
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Chinese Physics. C, High Energy Physics and Nuclear Physics
Additional Journal Information:
Journal Volume: 41; Journal Issue: 7; Journal ID: ISSN 1674-1137
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; chiral magnetic effect; heavy ion collisions; QCD

Citation Formats

Koch, Volker, Schlichting, Soeren, Skokov, Vladimir, Sorensen, Paul, Thomas, Jim, Voloshin, Sergei, Wang, Gang, and Yee, Ho-Ung. Status of the chiral magnetic effect and collisions of isobars. United States: N. p., 2017. Web. doi:10.1088/1674-1137/41/7/072001.
Koch, Volker, Schlichting, Soeren, Skokov, Vladimir, Sorensen, Paul, Thomas, Jim, Voloshin, Sergei, Wang, Gang, & Yee, Ho-Ung. Status of the chiral magnetic effect and collisions of isobars. United States. doi:10.1088/1674-1137/41/7/072001.
Koch, Volker, Schlichting, Soeren, Skokov, Vladimir, Sorensen, Paul, Thomas, Jim, Voloshin, Sergei, Wang, Gang, and Yee, Ho-Ung. Sun . "Status of the chiral magnetic effect and collisions of isobars". United States. doi:10.1088/1674-1137/41/7/072001. https://www.osti.gov/servlets/purl/1399665.
@article{osti_1399665,
title = {Status of the chiral magnetic effect and collisions of isobars},
author = {Koch, Volker and Schlichting, Soeren and Skokov, Vladimir and Sorensen, Paul and Thomas, Jim and Voloshin, Sergei and Wang, Gang and Yee, Ho-Ung},
abstractNote = {Here, we examine the current theoretical and experimental status of the chiral magnetic effect. We discuss possible future strategies for resolving uncertainties in interpretation including recommendations for theoretical work, recommendations for measurements based on data collected in the past five years, and recommendations for beam use in the coming years of RHIC. We then investigate the case for colliding nuclear isobars (nuclei with the same mass but different charge) and find the case compelling. We recommend that a program of nuclear isobar collisions to isolate the chiral magnetic effect from background sources be placed as a high priority item in the strategy for completing the RHIC mission.},
doi = {10.1088/1674-1137/41/7/072001},
journal = {Chinese Physics. C, High Energy Physics and Nuclear Physics},
number = 7,
volume = 41,
place = {United States},
year = {Sun Apr 30 00:00:00 EDT 2017},
month = {Sun Apr 30 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

Save / Share:
  • Here, the interplay of quantum anomalies with magnetic field and vorticity results in a variety of novel non-dissipative transport phenomena in systems with chiral fermions, including the quark–gluon plasma. Among them is the Chiral Magnetic Effect (CME)—the generation of electric current along an external magnetic field induced by chirality imbalance. Because the chirality imbalance is related to the global topology of gauge fields, the CME current is topologically protected and hence non-dissipative even in the presence of strong interactions. As a result, the CME and related quantum phenomena affect the hydrodynamical and transport behavior of strongly coupled quark–gluon plasma, andmore » can be studied in relativistic heavy ion collisions where strong magnetic fields are created by the colliding ions. Evidence for the CME and related phenomena has been reported by the STAR Collaboration at Relativistic Heavy Ion Collider at BNL, and by the ALICE Collaboration at the Large Hadron Collider at CERN. The goal of the present review is to provide an elementary introduction into the physics of anomalous chiral effects, to describe the current status of experimental studies in heavy ion physics, and to outline the future work, both in experiment and theory, needed to eliminate the existing uncertainties in the interpretation of the data.« less
  • Cited by 118
  • A quark interaction with topologically nontrivial gluonic fields, instantons and sphalerons, violates P and CP symmetry. In the strong magnetic field of a noncentral nuclear collision such interactions lead to the charge separation along the magnetic field, the so-called chiral magnetic effect (CME). Recent results from the STAR collaboration on charge dependent correlations are consistent with theoretical expectations for CME but may have contributions from other effects, which prevents definitive interpretation of the data. Here I propose to use central body-body U+U collisions to disentangle correlations due to CME from possible background correlations due to elliptic flow. Further, more quantitativemore » studies can be performed with collision of isobaric beams.« less
  • We derive a nonlocal effective Lagrangian for the chiral magnetic effect. An electric field is generated by winding number fluctuations of the nonabelian gauge field in the presence of a strong magnetic field. We estimate the magnitude of charge asymmetry fluctuations with respect to the reaction plane induced by the chiral magnetic effect in relativistic heavy-ion collisions to be less than 10{sup -6}, several orders of magnitude smaller than the signal observed in the STAR experiment.