The return of the prodigal Goldstone boson

Kapusta, Joseph I.; McLerran, Larry D.; Kharzeev, D.

doi:10.1103/PhysRevD.53.5028

Article
Report number	hep-ph/9507343 ; TPI-MINN-95-21-T ; NUC-MINN-95-18-T ; UMN-TH-1401-95 ; CERN-TH-95-168 ; CERN-TH-95-168 ; NUC-MINN-95-18-T ; TPI-MINN-95-21-T ; UMN-TH-1401
Title	The return of the prodigal Goldstone boson
Author(s)	Kapusta, Joseph I. (Minnesota U.) ; Kharzeev, D. (CERN ; Bielefeld U.) ; McLerran, Larry D. (Minnesota U.)
Affiliation	(Univ. Minnesota Minneapolis) ; (CERN) ; (Univ. Bielefeld)
Publication	1996
Imprint	19 Jul 1995
Number of pages	14
In:	Phys. Rev. D 53 (1996) 5028-5033
DOI	10.1103/PhysRevD.53.5028
Subject category	Particle Physics - Phenomenology
Abstract	We propose that the mass of the $\eta \prime$ meson is a particularly sensitive probe of the properties of finite energy density hadronic matter and quark gluon plasma. We argue that the mass of the $\eta \prime$ excitation in hot and dense matter should be small, and therefore that the $\eta \prime$ production cross section should be much increased relative to that for pp collisions. This may have observable consequences in dilepton and diphoton experiments.