Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (12): 179 doi: 10.1007/s41365-018-0520-z

Special Issue: Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2018)

• Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2018) • Previous Articles     Next Articles

Search for the chiral magnetic effect in heavy ion collisions

Fu-Qiang Wang 1,2 • Jie Zhao 2   

  1. 1 School of Science, Huzhou University, Huzhou 313000, China
    2 Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, USA
  • Received:2018-09-15 Revised:2018-11-02 Accepted:2018-11-10
  • Contact: Fu-Qiang Wang E-mail:fqwang@zjhu.edu.cn
  • Supported by:
    This work was supported in part by the National Natural Science Foundation of China (No. 11747312) and the U.S. Department of Energy (No. de-sc0012910).
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Fu-Qiang Wang, Jie Zhao. Search for the chiral magnetic effect in heavy ion collisions.Nuclear Science and Techniques, 2018, 29(12): 179     doi: 10.1007/s41365-018-0520-z

Abstract:

Quark interactions with topological gluon fields in quantum chromodynamics can yield local {\mathcal {P}} and {\mathcal {CP}} violations that could explain the matter–antimatter asymmetry in our universe. Effects of {\mathcal {P}} and {\mathcal {CP}} violations can lead to charge separation under a strong magnetic field, a phenomenon called the chiral magnetic effect (CME). Early measurements of the CME-induced charge separation in heavy ion collisions are dominated by physics backgrounds. This report discusses the recent innovative efforts in eliminating those backgrounds, namely by event-shape engineering, invariant mass dependence, and reaction and participant plane comparison. The background-free CME measurements using these novel methods are presented.

Key words: Heavy ion collisions, Chiral magnetic effect, Azimuthal correlator, Flow background, Invariant mass, Reaction plane, Participant plane