5 de julho de 2018 | Altas Energias, Publicações

η′ Production in Nucleus-Nucleus Collisions as a Probe of Chiral Dynamics

Giorgio Torrieri

Phys. Rev. C 98, 014901

05/07/2018

Abstract

I argue that, because of the peculiar properties of the η’ meson, it is a promising probe of chiral dynamics. In particular, I show that a rotating gluon-dominated plasma might lead to an enhanced production of η’ with respect to statistical model expectations. The presence of a strong topological susceptibility might give a similar effect. In both cases, unlike the statistical model, I expect a nontrivial dependence on event geometry, such as initial volume and impact parameter. Hence, an observation of η’/π ratio depending strongly on impact parameter might be a good indication of chiral effects, either from vorticity or topological phases of QCD.

10.1103/PhysRevC.98.014901