Initial State of Disoriented Chiral Condensate Formation

It is very unlikely to hit at high temperatures the state which is believed to be the starting point of DCC formation in the quenched approximation. The chiral symmetry is rather restored by large amplitude Goldstone modes, where energy is stored in the change of the chiral angle in space (domain to domain) and time. Such iso-p-wave states carry more entropy. In this paper we attempt to treat this contribution in the mean field approximation. One of the most interesting recent suggestions of exotic phenomena in high energy heavy ion collisions is the possibility of the formation of disoriented chiral condensates (DCC) [1]-[4]. This idea has been built on the semiclassical picture of chiral symmetry restoration at high temperature where finite temperature effects were considered on the pressure, such as masses of pion and sigma meson to the subleading order [5]-[8]. Recently many works on various aspects of DCC formation has been published [9]-[16]. Usually these considerations assume an initial state at high temperature in which the chiral symmetry is restored by vanishing collective fields, and independent vibrations in each isospin direction are present as thermal fluctuations. This configuration sits on the top of the barrier of the potential energy at zero temperature, so a sudden cooling of the system supposedly brings it into an unstable state. Indeed, while at low temperature in the slightly asymmetric version of the model a symmetry breaking vacuum state with finite sigma values