Partial $U(1)_A$ Restoration and $η$ Enhancement in High-Energy Heavy-Ion Collisions

Details Partial $U(1)_A$ Restoration and $η$ Enhancement in High-Energy Heavy-Ion Collisions Partial $U(1)_A$ Restoration and $η$ Enhancement in High-Energy Heavy-Ion Collisions

1995-07-25

arxiv.org/abs/hep-ph/9507395v3

Phys.Rev. D53 (1996) 5034-5041

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages in RevTeX, 3 uuencoded postscript figures some misspellings are corrected

Scientific paper

10.1103/PhysRevD.53.5034

We calculate the thermally averaged rates for the $\eta$-$\pi$ conversion and $\eta$ scattering using the Di Vecchia-Veneziano model and t' Hooft model, which incorporate explicitly the $U(1)_A$ anomaly. Assuming an exponential suppression of the $U(1)_A$ anomaly, we also take into account the partial restoration of $U(1)_A$ symmetry at high temperatures. We find that the chemical equilibrium between $\eta$ and $\pi$ breaks up considerably earlier than the thermal equilibrium. Two distinct scenarios for the $\eta$ freeze-out are discussed and the corresponding chemical potentials are calculated. We predict an enhancement of the thermal $\eta$-production as a possible signal of the partial $U(1)_A$ restoration in high-energy heavy-ion collisions.

Affiliated with

Also associated with

No associations

Rating

Partial $U(1)_A$ Restoration and $η$ Enhancement in High-Energy Heavy-Ion Collisions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Partial $U(1)_A$ Restoration and $η$ Enhancement in High-Energy Heavy-Ion Collisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Partial $U(1)_A$ Restoration and $η$ Enhancement in High-Energy Heavy-Ion Collisions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-142646