Anomalous Drell-Yan asymmetry from hadronic or QCD vacuum effects

Details Anomalous Drell-Yan asymmetry from hadronic or QCD vacuum effects Anomalous Drell-Yan asymmetry from hadronic or QCD vacuum effects

2005-11-03

arxiv.org/abs/hep-ph/0511025v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 4 eps figures; Talk presented at the International Workshop on Transverse Polarization Phenomena in Hard Processes (T

Scientific paper

The anomalously large cos(2 phi) asymmetry measured in the Drell-Yan process is discussed. Possible origins of this large deviation from the Lam-Tung relation are considered with emphasis on the comparison of two particular proposals: one that suggests it arises from a QCD vacuum effect and one that suggests it is a hadronic effect. Experimental signatures distinguishing these effects are discussed.

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