Final state interactions for BoseEinstein correlations in S+Pb $\to$ $\pi^+$$\pi^+$ +X reaction at energy 200GeV/nucleon
Abstract
We applied an analytical formula for BoseEinstein correlations (BEC) developed by us recently to highenergy heavy ion collisions, in particular to data on S+Pb$\to\pi^+$$\pi^+$+X reaction at energy $200$ GeV/nucleon reported by the NA44 Collaboration. It takes into account both Coulomb and strong ($\pi$$\pi$~swave; I=2) final state interactions (FSI). We have found that inclusion of the strong interaction in addition to Coulomb correction affects significantly the extracted parameters of the BEC like the source size $R$, the degree of coherence $\lambda$ and the longrange correlation parameter $\gamma$. In particular, the $\lambda$ parameter of the BEC is increased by about 20\%. Our results differ from those obtained in $e^+e^$ annihilation in the following way: the $\lambda$ parameter does not reach `chaotic limit' and the $\gamma$ parameter does not approach to zero.
 Publication:

arXiv eprints
 Pub Date:
 June 1996
 arXiv:
 arXiv:hepph/9606367
 Bibcode:
 1996hep.ph....6367O
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 9 pages, Latex type, 1 figure