Search for the Chiral Magnetic Effect in Relativistic Heavy-Ion Collisions

TL;DR

This paper reviews the progress in detecting the chiral magnetic effect in relativistic heavy-ion collisions, focusing on experimental techniques and background reduction methods over the past decade.

Contribution

It provides a comprehensive overview of experimental efforts and methodological advancements in the search for the CME in heavy-ion collisions.

Findings

Extensive studies have been conducted to distinguish CME signals from backgrounds.

New techniques have been developed to reduce or eliminate background contributions.

Progress has been made in understanding the experimental signatures of the CME.

Abstract

Relativistic heavy-ion collisions provide an ideal environment to study the emergent phenomena in quantum chromodynamics (QCD). The chiral magnetic effect (CME) is one of the most interesting, arising from the topological charge fluctuations of QCD vacua, immersed in a strong magnetic field. Since the first measurement nearly a decade ago of the possibly CME-induced charge correlation, extensive studies have been devoted to background contributions to those measurements. Many new ideas and techniques have been developed to reduce or eliminate the backgrounds. This article reviews these developments and the overall progress in the search for the CME.