Charge-dependent pair correlations relative to a third particle in $p$+Au and $d$+Au collisions at RHIC

Abstract

Quark interactions with topological gluon configurations can induce chirality imbalance and local parity violation in quantum chromodynamics. This can lead to electric charge separation along the strong magnetic field in relativistic heavy-ion collisions -- the chiral magnetic effect (CME). We report measurements by the STAR collaboration of a CME-sensitive observable in $p$+Au and $d$+Au collisions at 200 GeV, where the CME is not expected, using charge-dependent pair correlations relative to a third particle. We observe strong charge-dependent correlations similar to those measured in heavy-ion collisions. This bears important implications for the interpretation of the heavy-ion data.

8 pages, 4 figures

References in corpus (9)

• The Chiral Magnetic Effect
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Beam-energy dependence of charge separation along the magnetic field in Au+Au collisions at RHIC
• Charge conservation in RHIC and contributiuons to local parity violation observables
• Observation of charge-dependent azimuthal correlations in pPb collisions and its implication for the search for the chiral magnetic effect
• Experimental searches for the chiral magnetic effect in heavy-ion collisions
• Effects of non-uniform acceptance in anisotropic flow measurement
• Charge Fluctuations from the Chiral Magnetic Effect in Nuclear Collisions

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