Transverse velocity dependence of the proton-antiproton ratio as a signature of the QCD critical point.


Journal Article

The presence of a critical point in the QCD phase diagram can deform the trajectories describing the evolution of the expanding fireball in the mu_B-T phase diagram. If the average emission time of hadrons is a function of transverse velocity, as microscopic simulations of the hadronic freeze-out dynamics suggest, the deformation of the hydrodynamic trajectories will change the transverse velocity (beta_T) dependence of the proton-antiproton ratio when the fireball passes in the vicinity of the critical point. An unusual beta_T dependence of the [over]p/p ratio in a narrow beam energy window would thus signal the presence of the critical point.

Full Text

Duke Authors

Cited Authors

  • Asakawa, M; Bass, SA; Müller, B; Nonaka, C

Published Date

  • September 19, 2008

Published In

Volume / Issue

  • 101 / 12

Start / End Page

  • 122302 -

PubMed ID

  • 18851364

Pubmed Central ID

  • 18851364

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.101.122302


  • eng