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Title: Measurement of K0S and K*0 in p+p, d+Au, and Cu+Cu collisions at sqrt SNN = 200 GeV

Abstract

The PHENIX experiment at the Relativistic Heavy Ion Collider has performed a systematic study of K0S and K*0 meson production at midrapidity in p+p, d+Au, and Cu+Cu collisions at sqrt SNN = 200 GeV. The K0S and K*0 mesons are reconstructed via their K0S and π0(→γγ)π0 (→γγ) and K*0 → K ± π± decay modes, respectively. The measured transverse-momentum spectra are used to determine the nuclear modification factor of K0S and K*0 mesons in d+Au and Cu+Cu collisions at different centralities. In the d+Au collisions, the nuclear modification factor of K0S and K*0 mesons is almost constant as a function of transverse momentum and is consistent with unity showing that cold-nuclear-matter effects do not play a significant role in the measured kinematic range. In Cu+Cu collisions, within the uncertainties no nuclear modification is registered in peripheral collisions. In central collisions, both mesons show suppression relative to the expectations from the p+p yield scaled by the number of binary nucleon-nucleon collisions in the Cu+Cu system. In the pT range 2–5 GeV/c, the strange mesons ( K0S, K*0) similarly to the Φ meson with hidden strangeness, show an intermediate suppression between the more suppressed light quark mesons (π0) and the nonsuppressed baryonsmore » (p, p-bar). At higher transverse momentum, pT > 5 GeV/c, production of all particles is similarly suppressed by a factor of ≈2. (auth)« less

Authors:
 [1];  [2]
  1. Univ. of Colorado, Boulder, CO (United States)
  2. Columbia Univ., New York, NY (United States). et al.
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Brookhaven, NY (United States). Relativistic Heavy Ion Collider
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
PHENIX Collaboration
OSTI Identifier:
1159734
Alternate Identifier(s):
OSTI ID: 1181612
Report Number(s):
BNL-106189-2014-JA
Journal ID: ISSN 0556-2813; PRVCAN; KB0201021
Grant/Contract Number:  
AC02-98CH10886
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C, Nuclear Physics
Additional Journal Information:
Journal Volume: 90; Journal Issue: 5; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; measurement; Kos; K*0; p+p; d+Au; Cu+Cu; collisions; relativistic heavy ion collider

Citation Formats

Adare, A., and Aidala, C.. Measurement of K0S and K*0 in p+p, d+Au, and Cu+Cu collisions at sqrt SNN = 200 GeV. United States: N. p., 2014. Web. doi:10.1103/PhysRevC.90.054905.
Adare, A., & Aidala, C.. Measurement of K0S and K*0 in p+p, d+Au, and Cu+Cu collisions at sqrt SNN = 200 GeV. United States. https://doi.org/10.1103/PhysRevC.90.054905
Adare, A., and Aidala, C.. Sat . "Measurement of K0S and K*0 in p+p, d+Au, and Cu+Cu collisions at sqrt SNN = 200 GeV". United States. https://doi.org/10.1103/PhysRevC.90.054905. https://www.osti.gov/servlets/purl/1159734.
@article{osti_1159734,
title = {Measurement of K0S and K*0 in p+p, d+Au, and Cu+Cu collisions at sqrt SNN = 200 GeV},
author = {Adare, A. and Aidala, C.},
abstractNote = {The PHENIX experiment at the Relativistic Heavy Ion Collider has performed a systematic study of K0S and K*0 meson production at midrapidity in p+p, d+Au, and Cu+Cu collisions at sqrt SNN = 200 GeV. The K0S and K*0 mesons are reconstructed via their K0S and π0(→γγ)π0 (→γγ) and K*0 → K ± π± decay modes, respectively. The measured transverse-momentum spectra are used to determine the nuclear modification factor of K0S and K*0 mesons in d+Au and Cu+Cu collisions at different centralities. In the d+Au collisions, the nuclear modification factor of K0S and K*0 mesons is almost constant as a function of transverse momentum and is consistent with unity showing that cold-nuclear-matter effects do not play a significant role in the measured kinematic range. In Cu+Cu collisions, within the uncertainties no nuclear modification is registered in peripheral collisions. In central collisions, both mesons show suppression relative to the expectations from the p+p yield scaled by the number of binary nucleon-nucleon collisions in the Cu+Cu system. In the pT range 2–5 GeV/c, the strange mesons ( K0S, K*0) similarly to the Φ meson with hidden strangeness, show an intermediate suppression between the more suppressed light quark mesons (π0) and the nonsuppressed baryons (p, p-bar). At higher transverse momentum, pT > 5 GeV/c, production of all particles is similarly suppressed by a factor of ≈2. (auth)},
doi = {10.1103/PhysRevC.90.054905},
journal = {Physical Review C, Nuclear Physics},
number = 5,
volume = 90,
place = {United States},
year = {Sat Nov 01 00:00:00 EDT 2014},
month = {Sat Nov 01 00:00:00 EDT 2014}
}

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Cited by: 18 works
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