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ABSTRACT: High-p
T photon–hadron correlations are studied within the next-to-leading order (NLO) perturbative QCD parton model with modified
parton-jet fragmentation functions due to jet quenching in high-energy A+A collisions. In central A+A collisions, the away-side hadrons with large z
T=p
T
h
/p
T
γ
are controlled mainly by the surface emission of the gamma-jet events, while a small z
T region will be volume emission bias. In other words, gamma jets for a small-z
T region probe the dense matter deeper than those gamma jets for a large-z
T region, so the small-z
T gamma jets are found to be slightly more sensitive to the properties of the dense matter than the large-z
T gamma jets.
European Physical Journal C 04/2012; 61(4):825-828. · 3.63 Impact Factor
