Abstract
Abstract Parity-odd domains are theorized to form inside the quark–gluon plasma (QGP) created in high-energy heavy-ion collisions. The Chiral Magnetic Effect (CME) will lead to charge separation with respect to the reaction plane. Previous measurements from the RHIC and the LHC using charge-dependent two-particle azimuthal correlations are consistent with charge separations across the reaction plane, possibly induced by the CME. Such charge separation is expected to be absent if a neutral hadron is used for the correlations. The Λ ( Λ ¯ ) and K S 0 are employed to test the hypothesis based on the CME expectation in Au+Au collisions at s N N = 200 and 39 GeV by the STAR experiment. We find no significant charge separation for Λ ( Λ ¯ ) – h ± and K S 0 – h ± azimuthal correlations. In addition, theoretical calculation predicts that the Chiral Vortical Effect (CVE) leads to a baryon number separation with respect to the reaction plane. Measurements of Λ ( Λ ¯ ) – p ( p ¯ ) azimuthal correlation are presented to search for the CVE.
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