Speaker
Description
Dileptons are considered to be an important observable, in the context of studying the characteristics of the deconfined phase of quark gluon plasma (QGP). Historically, the dilepton production rates (DPR) from the QGP have been studied using two different approaches. In the quantum field theory (QFT) approach, the DPR is expressed in terms of the thermal expectation value of the current-current correlator [1] or the imaginary part of the photon self energy [2]. On the other hand, the kinetic theory (KT) framework assumes the QGP to be sufficiently weakly coupled, such that the quarks can be considered as quasiparticles and the DPR is computed based on a collision kernel for an inelastic scattering process. We discuss the equivalence of the two approaches at the Born level, where the QFT and KT frameworks give identical results.
Keywords: Dilepton production rate, Kinetic theory, Quark gluon plasma.
References:
1. D. McLerran and T. Toimela, Phys. Rev. D 31, 545 (1985).
2. H. A. Weldon, Phys. Rev. D 42, 2384 (1990).
3. K. Kajantie, J. I. Kapusta, L. D. McLerran, and A. Mekjian, Phys. Rev. D 34, 2746 (1986)
