Influence of the chiral magnetic effect on particle-pair elliptic anisotropy
arxiv(2024)
摘要
Chiral Magnetic Effect (CME) is a phenomenon in which electric charge is
separated by a strong magnetic field from local domains of chirality imbalance
in quantum chromodynamics. The CME-sensitive, azimuthal correlator difference
Δγ between opposite-sign (OS) and same-sign (SS) charged hadron
pairs is contaminated by a major physics background proportional to the
particle elliptic anisotropy (v_2). The CME signal, on the other hand,
contributes to the difference in the pair elliptic anisotropies between OS and
SS pairs (Δ v_2, pair). We investigate Δ v_2, pair and
found its sensitivity to CME to be similar to that of the Δγ
observable.
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