Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

10-4-2010

Journal or Book Title

Physical Review D

Volume

82

Issue

7

First Page

072001

DOI

10.1103/PhysRevD.82.072001

Abstract

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.

Comments

This article is published as Adare, A., S. Afanasiev, C. Aidala, N. N. Ajitanand, Yasuyuki Akiba, H. Al-Bataineh, J. Alexander et al. "High p T direct photon and π 0 triggered azimuthal jet correlations and measurement of k T for isolated direct photons in p+ p collisions at s= 200 GeV." Physical Review D 82, no. 7 (2010): 072001. DOI:10.1103/PhysRevD.82.072001. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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