Formation of the equation of state in the early stage of ultrarelativistic heavy-ion collisions

Seminar “THEORY OF HADRONIC MATTER UNDER EXTREME CONDITIONS”

Anna Radovskaya (Lebedev Institute, RAS, Moscow) “Formation of the equation of state in the early stage of ultrarelativistic heavy-ion collisions” Abstract We discuss a schematic model describing the evolution of matter created in ultrarelativistic heavy-ion collisions. We employ the Keldysh formalism in order to describe the relaxation of a quantum field from the initial, highly excited state. For the case of a homogeneous scalar field we show the emergence of the equation of state explicitly. We present a complete description of subleading corrections and discuss analytical expressions for some of them.