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Common suppression pattern of eta and pi0 mesons at high transverse momentum in Au + Au collisions at square root S(NN) = 200 GeV.
Phys Rev Lett ; 96(20): 202301, 2006 May 26.
Article in En | MEDLINE | ID: mdl-16803168
Inclusive transverse momentum spectra of eta mesons have been measured within p(T) = 2-10 GeV/c at midrapidity by the PHENIX experiment in Au + Au collisions at square root S(NN) = 200 GeV. In central Au+Au the eta yields are significantly suppressed compared to peripheral Au + Au, d + Au, and p + p yields scaled by the corresponding number of nucleon-nucleon collisions. The magnitude, centrality, and p(T) dependence of the suppression is common, within errors, for eta and pi0. The ratio of eta to pi0 spectra at high p(T) amounts to 0.40 < R(eta/pi)0 < 0.48 for the three systems, in agreement with the world average measured in hadronic and nuclear reactions and, at large scaled momentum, in e+e- collisions.
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Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2006 Document type: Article Affiliation country: United States Country of publication: United States
Search on Google
Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2006 Document type: Article Affiliation country: United States Country of publication: United States