Two and Three-Pion Quantum Statistics Correlations in Pb-Pb Collisions at sqrt(sNN)=2.76 TeV at the LHC

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2.76 TeV
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Correlations induced by quantum statistics are sensitive to the spatio-temporal extent as well as dynamics of particle emitting sources in heavy-ion collisions.  
In addition, such correlations can be used to search for the presence of a coherent component of pion production.  Two and three-pion correlations of
same and mixed-charge are measured at low relative momentum to estimate the coherent fraction of charged pions in Pb-Pb collisions at sqrt(s_nn}= 2.76 TeV at the LHC with ALICE.  The genuine three-pion quantum statistics correlation is found to be suppressed relative to the two-pion correlation based on the assumption of fully chaotic
pion emission.  The suppression is observed to decrease
with triplet momentum.  The observed suppression at low triplet momentum may correspond to a coherent fraction in
charged pion emission of 22percent +- 12percent.