Net charge fluctuations in Au+Au collisions at √s_NN=130 GeV

Author Info

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

Recommended Citation

Published in Physical Review C, Volume 68, Issue 4, October 31, 2003, pages 044905-1-044905-9.

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/PhysRevC.68.044905.

Abstract

We present the results of charged particle fluctuations measurements in Au+Au collisions at √s_NN=130 GeV using the STAR detector. Dynamical fluctuations measurements are presented for inclusive charged particle multiplicities as well as for identified charged pions, kaons, and protons. The net charge dynamical fluctuations are found to be large and negative providing clear evidence that positive and negative charged particle production is correlated within the pseudorapidity range investigated. Correlations are smaller than expected based on model-dependent predictions for a resonance gas or a quark-gluon gas which undergoes fast hadronization and freeze-out. Qualitative agreement is found with comparable scaled p+p measurements and a heavy ion jet interaction generation model calculation based on independent particle collisions, although a small deviation from the 1 ∕ N scaling dependence expected from this model is observed.

Disciplines

Physics

Copyright

2003 American Physical Society.

Number of Pages

9

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.