Multiplicity and Pseudorapidity Distributions of Photons in Au+Au Collisions at √s_NN=62.4 GeV

Author Info

STAR Collaboration
T.D. Gutierrez, University of California, DavisFollow

Recommended Citation

Published in Physical Review Letters, Volume 95, Issue 6, August 5, 2005, pages 062301-1-062301-6.

STAR is composed of 63 institutions from 13 countries, with a total of 611 collaborators. A variety of personnel participate in the collaboration, including students, university faculty and staff, national laboratory staff, and engineers.

For more information on the STAR Collaboration, visit https://www.star.bnl.gov

The definitive version is available at https://doi.org/10.1103/PhysRevLett.95.062301.

Abstract

We present the first measurement of pseudorapidity distribution of photons in the region 2.3≤η≤3.7for different centralities in Au+Au collisions at √s_NN=62.4  GeV. We find that the photon yield scales with the number of participating nucleons at all collision centralities studied. The pseudorapidity distribution of photons, dominated by π⁰ decays, has been compared to those of charged pions, photons, and inclusive charged particles from heavy-ion and nucleon-nucleon collisions at various energies. The photon production has been shown to be consistent with the energy and centrality independent limiting fragmentation scenario.

Disciplines

Physics

Copyright

2005 American Physical Society.

Number of Pages

6

Publisher statement

This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society.

NOTE: At the time of publication, the author Thomas Gutierrez was not yet affiliated with Cal Poly.