On possible $Θ$ vacua states in heavy ion collisions

Details On possible $Θ$ vacua states in heavy ion collisions On possible $Θ$ vacua states in heavy ion collisions

2000-12-05

arxiv.org/abs/hep-ph/0012047v2

Phys.Rev. C64 (2001) 054902

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages including 3 figures

Scientific paper

10.1103/PhysRevC.64.054902

We have simulated the possible $\Theta$ vacua states in heavy ion collisions. In a quench like scenario, random phases of the chiral fields were evolved in a zero temperature potential incorporating the breaking of $U_A(1)$ symmetry. Initial random phases very quickly settles into oscillation around the values dictated by the potential. The simulation indicate that $\Theta$ vacua states that can be populated in heavy ion collisions is a coherent superposition of a number of modes.

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