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arXiv · 0712.0777

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

D. Boer·P. J. Mulders·C. Pisano
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Abstract

The angular distribution in photon-jet production in p \bar{p} -> γjet 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(2ϕ) 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(2ϕ) 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.

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D. Boer, P. J. Mulders, C. Pisano. 2008-01-21. T-odd effects in photon-jet production at the Tevatron. https://doi.org/10.1016/j.physletb.2008.01.021

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