T-odd effects in photon-jet production at the Tevatron
Abstract
The angular distribution in photon-jet production in p \bar{p} -> \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 cos(2\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^{\perp q}(x, p_{\perp}^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.
Keywords
Cite
@article{arxiv.0712.0777,
title = {T-odd effects in photon-jet production at the Tevatron},
author = {D. Boer and P. J. Mulders and C. Pisano},
journal= {arXiv preprint arXiv:0712.0777},
year = {2008}
}
Comments
9 pages, 3 figures; references and discussion added in Section II, matches final version to be published in Phys. Lett. B