High p(T) direct photon and pi(0) triggered azimuthal jet correlations and measurement of k(T) for isolated direct photons in p plus p collisions at root s=200 GeV
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
18/04/2012
18/04/2012
2010
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Resumo |
Correlations of charged hadrons of 1< p(T) < 10 Gev/c with high pT direct photons and pi(0) mesons in the range 5< p(T) < 15 Gev/c are used to study jet fragmentation in the gamma + jet and dijet channels, respectively. The magnitude of the partonic transverse momentum, k(T), is obtained by comparing to a model incorporating a Gaussian kT smearing. The sensitivity of the associated charged hadron spectra to the underlying fragmentation function is tested and the data are compared to calculations using recent global fit results. The shape of the direct photon-associated hadron spectrum as well as its charge asymmetry are found to be consistent with a sample dominated by quark-gluon Compton scattering. No significant evidence of fragmentation photon correlated production is observed within experimental uncertainties. Office of Nuclear Physics in the Office of Science of the Department of Energy (DOE) |
Identificador |
PHYSICAL REVIEW D, v.82, n.7, 2010 1550-7998 http://producao.usp.br/handle/BDPI/16064 10.1103/PhysRevD.82.072001 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC |
Relação |
Physical Review D |
Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #HEAVY-ION COLLISIONS #DEEP-INELASTIC SCATTERING #FRAGMENTATION FUNCTIONS #TRANSVERSE-MOMENTUM #CROSS-SECTION #P(P)OVER-BAR COLLISIONS #ENERGY #QCD #PARTICLES #QUARK #Astronomy & Astrophysics #Physics, Particles & Fields |
Tipo |
article original article publishedVersion |