摘要
Generalized Boltzmann approximation of the phase-space distribution function of quarks in the quark phase and of pions in the hadron phase,adopted by previous authors,to a complete expression,the dilepton production in Bjorken's(1+1)dimensional scaling expansion system is studied.We find that the dilepton production is heightened,and the shape of the characteristic dilepton dietribution for the quark matter formation in ultrarelativistic nucleus-nucleus collisions is significantly changed.
