Dileptons and Open Charm: Probes of Chiral Restoration K. Gallmeister, B. Kämpfer and S. Zschocke
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چکیده
(2) where 〈〈· · ·〉〉means the thermal average with respect to the medium with temperature T and baryon density n; Jμ is the electromagnetic current operator. Also the real photon emission rate is related to ImΠμν . Therefore, the electromagnetic probes are sensitive to the medium properties. Since the absorption probability of such probes, once emitted, is small they carry information on the full evolution, in particular also on the early hot, dense stages in heavy-ion collisions.
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تاریخ انتشار 2004