T-odd effects in photon-jet production at the Tevatron

D. Boer, P. J. Mulders, C. Pisano*

*Corresponding author for this work

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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 languageEnglish
Pages (from-to)360-368
Number of pages9
JournalPhysics Letters B
Volume660
Issue number4
DOIs
Publication statusPublished - 28-Feb-2008
Externally publishedYes

Keywords

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

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