Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-02-13
Physics
High Energy Physics
High Energy Physics - Experiment
4th international workshop High-pT physics at LHC 09 February 4-7, 2009, Prague, Czech Republic
Scientific paper
Two-particle correlations of direct photon triggers with associated hadrons are obtained by isolation method in p+p collisions at \sqrt{s} = 200 GeV in PHENIX at RHIC. The initial momentum of the away-side parton is tightly constrained, because the parton-photon pair is balanced in momentum at the leading order in perturbative quantum chromodynamics (pQCD). Therefore making such correlations can be used as a tool to measure the away-side parton fragmentation function. The direct photon associated yields in p+p collisions are compared with PYTHIA and the effect of the $k_{T}$ smearing in the spectra is discussed.
Kim Dong Jik
Rak Jan
Räsänen S. S.
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