Transverse momentum and centrality dependence of dihadron correlations in Au+Au collisions at {radical}(s{sub NN})=200 GeV: Jet quenching and the response of partonic matter

Journal Article · Tue Jan 15 04:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.011901· OSTI ID:21068031

Adare, A; Bickley, A A; Ellinghaus, F; Kelly, S; Kinney, E; Nagle, J L; Seele, J; Wysocki, M ^[1]; Afanasiev, S; Isupov, A; Litvinenko, A; Malakhov, A; Peresedov, V; Rukoyatkin, P; Zolin, L ^[2]; Aidala, C; Bjorndal, M T; Chi, C Y; Cole, B A; D'Enterria, D ^[3]

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1. University of Colorado, Boulder, Colorado 80309 (United States)
2. Joint Institute for Nuclear Research, Moscow Region, RU-141980 Dubna (Russian Federation)
3. Columbia University, New York, New York 10027 and Nevis Laboratories, Irvington, New York 10533 (United States)

Azimuthal angle ({delta}{phi}) correlations are presented for charged hadrons from dijets for 0.4<p{sub T}<10 GeV/c in Au+Au collisions at {radical}(s{sub NN})=200 GeV. With increasing p{sub T}, the away-side distribution evolves from a broad and relatively flat shape to a concave shape, then to a convex shape. Comparisons to p+p data suggest that the away-side can be divided into a partially suppressed 'head' region centered at {delta}{phi}{approx}{pi} and an enhanced 'shoulder' region centered at {delta}{phi}{approx}{pi}{+-}1.1. The p{sub T} spectrum for the head region softens toward central collisions, consistent with the onset of jet quenching. The spectral slope for the shoulder region is independent of centrality and trigger p{sub T}, which offers constraints on energy transport mechanisms and suggests that it contains the medium response to energetic jets.

• OSTI ID: 21068031
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 77; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COMPARATIVE EVALUATIONS
CORRELATIONS
DISTRIBUTION
GEV RANGE
GOLD 197 REACTIONS
GOLD 197 TARGET
JET MODEL
NUCLEAR MATTER
PROTON-PROTON INTERACTIONS
QUARK MATTER
QUARKS
QUENCHING
TRANSVERSE MOMENTUM