Measurements of the chiral magnetic effect with background isolation in 200 GeV Au+Au collisions at STAR

Using two novel methods, pair invariant mass (minv) and comparative measurements with respect to reaction plane (ΨRP) and participant plane (ΨPP), we isolate the possible chiral magnetic effect (CME) from backgrounds in 200 GeV Au+Au collisions at STAR. The invariant mass method identifies the reson...

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Bibliographic Details
Published in:Nuclear physics. A 2019-02, Vol.982 (C), p.535-538
Main Author: Zhao, Jie
Format: Article
Language:English
Subjects:
chiral magnetic effect
heavy-ion collisions
invariant mass
NUCLEAR PHYSICS AND RADIATION PHYSICS
participant plane
QCD
reaction plane
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Summary:Using two novel methods, pair invariant mass (minv) and comparative measurements with respect to reaction plane (ΨRP) and participant plane (ΨPP), we isolate the possible chiral magnetic effect (CME) from backgrounds in 200 GeV Au+Au collisions at STAR. The invariant mass method identifies the resonance background contributions, coupled with the elliptic flow (ν2), to the charge correlator CME observable (Δγ). At high mass (minv>1.5GeV/c2) where resonance contribution is small, we obtain the average Δγ magnitude. In the low mass region (minv
ISSN:0375-9474
DOI:10.1016/j.nuclphysa.2018.08.035