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Glauber gluons in pion-induced Drell-Yan processes
2014
Proceedings of XV International Conference on Hadron Spectroscopy — PoS(Hadron 2013)
unpublished
Preserved Fulltext
We point out that the existence of Glauber gluons in the k T factorization theorem can account for the violation of the Lam-Tung relation, namely, the anomalous lepton angular distribution observed in pion-induced Drell-Yan processes. This mechanism is compared to other resolutions in the literature by means of vacuum effects and Boer-Mulders functions. We propose to discriminate the above resolutions by measuring the p p Drell-Yan process at GSI and J-PARC.
doi:10.22323/1.205.0133
fatcat:3nhpmrldevbotf7hdkvfm7fnxi