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arxiv nucl-th/0310057 v3 pith:UHXF4FVB submitted 2003-10-23 nucl-th hep-phnucl-ex

Source Chaoticity from Two- and Three-Pion Correlations in Au+Au collisions at sqrt{s_(NN)}=130 GeV?

classification nucl-th hep-phnucl-ex
keywords correlationchaoticitycollisionsfunctionthree-piontwo-pioncoherentextracted
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consistently analyze two-pion correlation functions and three-pion correlation functions of 130$A$ GeV Au+Au collisions measured at RHIC, applying three models of partially coherent pion sources. The effect of long-lived resonances on the chaoticity in the two-pion correlation function is estimated on the basis of a statistical model. We find that the chaoticity extracted from the three-pion correlation function is consistent with that extracted from the two-pion correlation function at vanishing relative momenta after the subtraction of the contribution of the long-lived resonance decays. All three models indicate that pions are emitted from the mixture of a chaotic source and coherent sources in the 130$A$ GeV Au+Au collisions.

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