Estimate of the CME signal in heavy-ion collisions from measurements relative to the participant and spectator flow planes

2018/05/14 by Sergei A. Voloshin · 1 citation
Physics and Astronomy · #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.98.054911

published as Phys. Rev. C 98, 054911 (2018) · Latex, 7 pages

arxiv created 2018/05/14 · arxiv updated 2018/12/05

Abstract

An interpretation of the charge dependent correlations sensitive to the Chiral Magnetic Effect (CME) -- the separation of the electric charges along the system magnetic field (across the reaction plane) -- is ambiguous due to a possible large background (non-CME) effects. The background contribution is proportional to the elliptic flow v₂; it is the largest in measurements relative to the participant plane, and is smaller in measurements relative to the flow plane determined by spectators, where the CME signal, on opposite, is likely larger. In this note I discuss a possible strategy for corresponding experimental measurements, and list and evaluate different assumptions related to this approach.

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• Probing the chiral magnetic effect via transverse spherocity event classification in relativistic heavy-ion collisions