Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

10-2009

Journal or Book Title

Physical Review Letters

Volume

103

Issue

14

First Page

142301

DOI

10.1103/PhysRevLett.103.142301

Abstract

Bose-Einstein correlations of charged kaons are used to probe Au+Au collisions at s(NN)=200 GeV and are compared to charged pion probes, which have a larger hadronic scattering cross section. Three-dimensional Gaussian source radii are extracted, along with a one-dimensional kaon emission source function. The centrality dependences of the three Gaussian radii are well described by a single linear function of N-part(1/3) with a zero intercept. Imaging analysis shows a deviation from a Gaussian tail at r greater than or similar to 10 fm, although the bulk emission at lower radius is well described by a Gaussian. The presence of a non-Gaussian tail in the kaon source reaffirms that the particle emission region in a heavy-ion collision is extended, and that similar measurements with pions are not solely due to the decay of long-lived resonances.

Comments

This article is published as Afanasiev, S., C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, A. Al-Jamel, K. Aoki et al. "Charged Kaon Interferometric Probes of Space-Time Evolution in Au+ Au Collisions at s NN= 200 GeV." Physical review letters 103, no. 14 (2009): 142301. DOI:10.1103/PhysRevLett.103.142301. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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