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Partonic effects on pion interferometry at the relativistic heavy-ion collider
Zi-Wei Lin1, C M Ko, Subrata Pal
1Cyclotron Institute and Physics Department, Texas A&M University, College Station 77843-3366, USA.
Abstract:
Using a multiphase transport model that includes both initial partonic and final hadronic interactions, we study the pion interferometry at the Relativistic Heavy-Ion Collider. We find that the two-pion correlation function is sensitive to the magnitude of the parton-scattering cross section, which controls the parton density at which the transition from the partonic to hadronic matter occurs. Also, the emission source of pions is non-Gaussian, leading to source radii that can be more than twice larger than the radius parameters extracted from a Gaussian fit to the correlation function.
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