Inst High Energy Phys, Beijing 100039, Peoples R China
; Tsing Hua Univ, Dept Engn Phys, Beijing 100084, Peoples R China
The difference between intensity interferometry and measurements of two-particle momentum correlations in heavy-ion collisions is discussed. These approaches are generally used to estimate the time-space scale of fireballs produced in heavy-ion collisions. It is inferred that the C(q(inv)) function will increase with the decrease of q(inv) for both bosons and fermions, if q(inv) does not approach zero.