Colour Modification of Effective T-odd Distributions

Details Colour Modification of Effective T-odd Distributions Colour Modification of Effective T-odd Distributions

2007-03-27

arxiv.org/abs/hep-ph/0703293v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure, uses revtex4 class and feynmp package - revised version for journal resubmission

Scientific paper

We show that soft-gluon twist-3 contributions to single-spin asymmetries (SSA) in hard processes may be expressed in the form of effective T-odd Sivers distributions, whose signs and scales are modified by process-dependent colour factors. We thus prove that the Sivers mechanism may also be applied at large transverse momenta. We stress that twist-3 SSA in semi-inclusive deeply inelastic scattering and Drell-Yan processes are suppressed by transverse momentum rather than a virtual-photon momentum transfer and thus naively correspond to twist two at the hadronic level. More rigorously, the transverse-momentum weighted averages of the Sivers function correspond to increasing twist (3, 5, 7, ...) while the full kT-dependent Sivers function (just as other transverse-momentum dependent distribution and fragmentation functions) corresponds to a resummed infinite tower of higher twists.

Affiliated with

Also associated with

No associations

Rating

Colour Modification of Effective T-odd Distributions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Colour Modification of Effective T-odd Distributions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Colour Modification of Effective T-odd Distributions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-272517