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Onset of π.sup.0./sup. suppression studied in Cu+Cu collisions at √s.sub.NN./sub.=22.4, 62.4, and 200 GeV
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SYSNO ASEP 0322428 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Onset of π0 suppression studied in Cu+Cu collisions at √sNN=22.4, 62.4, and 200 GeV Title Počátek π0 potlačení studovaný v Cu+Cu srážkách při √sNN=22.4, 62.4, a 200 GeV Author(s) Adare, A. (US)
Afanasiev, S. (RU)
Aidala, C. (US)
Kubart, J. (CZ)
Mašek, L. (CZ)
Mikeš, P. (CZ)
Tomášek, Lukáš (FZU-D) RID, ORCID
Vrba, Václav (FZU-D) RID, ORCIDSource Title Physical Review Letters. - : American Physical Society - ISSN 0031-9007
Roč. 101, č. 16 (2008), 162301/1-162301/6Number of pages 6 s. Language eng - English Country US - United States Keywords π0 suppression ; Cu+Cu collisions Subject RIV BF - Elementary Particles and High Energy Physics R&D Projects LA08015 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) 1P04LA211 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA202/05/0653 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100502 - FZU-D (2005-2011) UT WOS 000260141300011 DOI 10.1103/PhysRevLett.101.162301 Annotation Neutral pion transverse momentum (pT) spectra at midrapidity (|y|<=0.35) were measured in Cu+Cu collisions at s(NN)=22.4, 62.4, and 200 GeV. Relative to π0 yields in p+p collisions scaled by the number of inelastic nucleon-nucleon collisions (Ncoll) the π0 yields for pT>=2 GeV/c in central Cu+Cu collisions are suppressed at 62.4 and 200 GeV whereas an enhancement is observed at 22.4 GeV. A comparison with a jet-quenching model suggests that final state parton energy loss dominates in central Cu+Cu collisions at 62.4 and 200 GeV, while the enhancement at 22.4 GeV is consistent with nuclear modifications in the initial state alone. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2009
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