ALICE probes of local parity violation with charge dependent azimuthal correlations in Pb-Pb collisions

Physics – Nuclear Physics – Nuclear Experiment

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Talk given at the 7th Workshop on Particle Correlations and Femtoscopy (WPCF 2011), 20-24 September 2011, Tokyo, Japan; 6 page

Scientific paper

We report on the measurement of two and three particle azimuthal correlations in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV recorded with ALICE at the LHC. While two particle azimuthal correlations mainly provide an important information on possible background correlations, the three particle correlator probes the charge separation of hadrons with respect to the collision reaction plane which is expected for local parity violation in strong interactions. The two and three particle correlations are presented as a function of collision centrality and differentially vs. pseudorapidity and transverse momentum, and provide strong constraints on the possible mechanism of background (parity conserving) and signal (parity odd) effects in heavy-ion collisions.

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