## Abstract

The angular distribution in photon-jet production in p (p) over bar -> gamma jet X is studied within a generalized factorization scheme taking into account the transverse momentum of the partons in the initial hadrons. Within this scheme an anomalously large cos2 phi asymmetry observed in the Drell-Yan process could be attributed to the T-odd, spin and transverse momentum dependent parton distribution function h(1)(perpendicular to q) (x, p(perpendicular to)(2)). This same function is expected to produce a cos 2 phi asymmetry in the photon-jet production cross section. We give the expression for this particular azimuthal asymmetry, which is estimated to be smaller than the Drell-Yan asymmetry but still of considerable size for Tevatron kinematics. This offers a new possibility to study T-odd effects at the Tevatron.

Original language | English |
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Pages (from-to) | 360-368 |

Number of pages | 9 |

Journal | Physics Letters B |

Volume | 660 |

Issue number | 4 |

DOIs | |

Publication status | Published - 28-Feb-2008 |

Externally published | Yes |

## Keywords

- DRELL-YAN PROCESS
- LEPTON PAIR PRODUCTION
- ANGULAR-DISTRIBUTIONS
- PARTON DISTRIBUTIONS
- HADRONIC COLLISIONS
- SPIN ASYMMETRIES
- NEGATIVE PIONS
- SCATTERING
- LEPTOPRODUCTION
- FACTORIZATION