Common Suppression Pattern of {eta} and {pi}{sup 0} Mesons at High Transverse Momentum in Au+Au Collisions at {radical}(s{sub NN})=200 GeV

Journal Article · Fri May 26 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.202301· OSTI ID:20777247

Adler, S S; Aidala, C; Aronson, S H; Chujo, T; David, G; Desmond, E J; Ewell, L; Franz, A; Guryn, W; Haggerty, J S; Harvey, M; Johnson, B M; Kistenev, E; Kroon, P J; Makdisi, Y I; Mioduszewski, S; Mitchell, J T; Morrison, D P; O'Brien, E; Pinkenburg, C ^[1]

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1. Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)

Inclusive transverse momentum spectra of {eta} mesons have been measured within p{sub T}=2-10 GeV/c at midrapidity by the PHENIX experiment in Au+Au collisions at {radical}(s{sub 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{sub T} dependence of the suppression is common, within errors, for {eta} and {pi}{sup 0}. The ratio of {eta} to {pi}{sup 0} spectra at high p{sub T} amounts to 0.40<R{sub {eta}/{pi}{sup 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{sup +}e{sup -} collisions.

• OSTI ID: 20777247
• Journal Information: Physical Review Letters, Vol. 96, Issue 20; Other Information: DOI: 10.1103/PhysRevLett.96.202301; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COLLIDING BEAMS
DEUTERONS
ELECTRON-POSITRON COLLISIONS
ELECTRONS
ETA MESONS
GEV RANGE 100-1000
GOLD 197 BEAMS
GOLD 197 REACTIONS
GOLD 197 TARGET
INCLUSIVE INTERACTIONS
PIONS NEUTRAL
POSITRONS
PROTON-PROTON INTERACTIONS
SPECTRA
TRANSVERSE MOMENTUM