A Comparison of HBT Measurements for d + Au and Au + Au collision systems at √S_NN = 200 GeV

Two-pion Bose-Einstein correlations are a valuable tool for studying the space-time extent of emission sources in p + A, d + A, and A + A collisions. In recent work, PHENIX has extracted the 3-D HBT radii as a function of centrality and transverse-pair mass (m_T) for the d + Au and Au + Au collision systems. A comparison of the radii for both systems indicate strong similarities in the detailed dependencies on centrality and m_T, suggestive of important final-state re-scattering effects in the reaction dynamics for the d + Au and Au + Au systems. The measurements also point to a smaller freeze-out size and system lifetime in d + Au as compared to Au + Au.