Speaker
Mr
Arpan Das
(Institute of Physics, Bhubaneswar, India)
Description
Reaction-diffusion equations with suitable boundary conditions have special propagating solutions which very closely resemble the moving interfaces in a first order transition. We show that the dynamics of chiral order parameter in heavy-ion collisions, with dissipative dynamics, is governed by one such equation, specifically, the Newell-Whitehead equation. The chiral transition is, therefore, completed by a propagating interface, exactly as for a first order transition, even though the transition actually is a crossover for relativistic heavy$-$ion collisions. Same thing also happens when we consider the initial confinement$-$deconfinement transition with Polyakov loop order parameter. We next consider the case of high multiplicity pp collisions at LHC energy where a transient stage of quark-gluon plasma, where chiral symmetry is restored, may be achieved. We study the dynamics of chiral field for such an event using reaction$-$diffusion equation approach and show that the interior of such a rapidly expanding system is likely to lead to the formation of a single large domain of disoriented chiral condensate (DCC).
Author
Mr
Arpan Das
(Institute of Physics, Bhubaneswar, India)
Co-authors
Ajit M. Srivastava
(Institute of Physics, Bhubaneswar, India)
Mr
Partha Bagchi
(Institute of Physics, Bhubaneswar, India)
Srikumar Sengupta
(Institute of Physics, Bhubaneswar, India})
