Chiral Magnetic Effect Task Force Report

TL;DR

This report reviews the current understanding of the chiral magnetic effect, discusses experimental and theoretical progress, and advocates for nuclear isobar collisions at RHIC to better isolate and study the effect.

Contribution

It proposes a focused experimental program using nuclear isobar collisions at RHIC to clarify the chiral magnetic effect, addressing existing uncertainties.

Findings

Nuclear isobar collisions can help isolate the chiral magnetic effect.

Current experimental and theoretical efforts have advanced understanding but need further clarification.

A strategic program at RHIC is recommended to prioritize this research.

Abstract

In this report, we briefly examine the current status of the study of the chiral magnetic effect including theory and experimental progress. We recommend 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 have specifically investigated 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.