Proton-Lambda correlations in central Au+Au collisions at root s(NN)=200 GeV
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We report on p-,p-,p-, and p- correlation functions constructed in central Au-Au collisions at sNN=200 GeV by the STAR experiment at RHIC. The proton and lambda source size is inferred from the p- and p- correlation functions. It is found to be smaller than the pion source size also measured by the STAR experiment at smaller transverse masses, in agreement with a scenario of a strong universal collective flow. The p- and p- correlation functions, which are measured for the first time, exhibit a large anticorrelation. Annihilation channels and/or a negative real part of the spin-averaged scattering length must be included in the final-state interactions calculation to reproduce the measured correlation function. 2006 The American Physical Society.
author list (cited authors)
Adams, J., Aggarwal, M. M., Ahammed, Z., Amonett, J., Anderson, B. D., Arkhipkin, D., ... Zuo, J. X.