Transversity K factors for Drell-Yan processes
Dipartimento di Fisica e Matematica, Universitá degli Studi dell’Insubria, sede di Como, via Valleggio 11, 22100, Como, Italy
2 Istituto Nazionale di Fisica Nucleare, sezione di Milano, via G. Celoria 16, 20133, Milano, Italy
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The question of the K factor in transversely polarised Drell-Yan (DY) processes is examined. The transverse-spin case is peculiar for the absence of a reference point in deeply inelastic scattering (DIS). Therefore, in order to study more fully the possible effects of higher-order corrections on DY asymmetries, a DIS definition for transversity is devised using a hypothetical scalar (Higgs-like) vertex. The results show that some care may be required in interpreting experimentally extracted partonic transversity, in particular when comparing with model calculations or predictions.
© Springer-Verlag, 2005