Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

4-2005

Journal or Book Title

Physical Review Letters

Volume

94

Issue

12

First Page

122302

DOI

10.1103/PhysRevLett.94.122302

Abstract

The production of deuterons and antideuterons in the transverse momentum range 1.1 < p(T)< 4.3 GeV/c at midrapidity in Au+Au collisions at root s(NN) = 200 GeV has been studied by the PHENIX experiment at RHIC. A coalescence analysis, comparing the deuteron and antideuteron spectra with that of proton and antiproton, has been performed. The coalescence probability is equal for both deuterons and antideuterons and it increases as a function of p(T), which is consistent with an expanding collision zone. Comparing (anti)proton yields, (p) over bar /p = 0.73 +/- 0.01, with (anti)deuteron yields, (d) over bar /d = 0.47 +/- 0.03, we estimate that (n) over bar /n = 0.64 +/- 0.04. The nucleon phase space density is estimated from the coalescence measurement.

Comments

This article is published as Adler, S. S., S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas et al. "Deuteron and Antideuteron Production in Au+ Au Collisions at s N N= 200 GeV." Physical review letters 94, no. 12 (2005): 122302. DOI: 10.1103/PhysRevLett.94.122302. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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