K*(892)0 and K̅ *(892)0 production in central Pb + Pb, Si + Si, C + C, and inelastic p + p collisions at 158A GeV
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Author(s)
Veres, Gabor
Roland, Christof E
Roland, Gunther M
Date Issued
December 2011
Journal
Physical Review C
Publisher
American Physical Society
Citation
Anticic, T. et al. “K^{*}(892)^{0} and K[over ¯]^{*}(892)^{0} Production in Central Pb + Pb, Si + Si, C + C, and Inelastic p + p Collisions at 158A GeV.” Physical Review C 84.6 (2011): 064909. © 2011 American Physical Society.
Version
Final published version
Abstract
Production of the K∗(892)0 and K∗(892)0 resonances was studied via their K+π− and K−π+ decay modes in central Pb + Pb, Si + Si, C + C, and inelastic p + p collisions at 158A GeV(√sNN = 17.3 GeV) with the NA49 detector at the CERN SPS. Transverse momentum and rapidity distributions were measured and total yields were estimated. The yield of K∗ exceeds that of K∗ by about a factor of two in nucleus-nucleus reactions. The total yield ratios / and /are strongly suppressed in central Pb + Pb compared to p + p, C + C, and Si + Si collisions, in agreement with the expected attenuation of these short-lived resonance states in the hadronic phase of the expanding fireball. The UrQMD model, although incorporating such a scenario, does not provide a quantitative description of the experimental results. The statistical hadron gas model assuming the same freeze-out parameters for stable hadrons and resonances overestimates the / ratios in central Pb + Pb collisions by about a factor of 2.5.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevC.84.064909
