On the Anomalous Dimension of the Transversity Distribution h 1 ( x , Q 2 ) 1
نویسنده
چکیده
We calculate the leading order anomalous dimension of the transversity structure function directly using three different methods, the local light–cone expansion in the forward case, the non–forward case, and the short–distance expansion of the forward Compton amplitude. Our results agree with the original calculation by Artru and Mekhfi [Z. Phys. 45 (1990) 669], which has been doubted recently. We also comment on the next-to-leading order anomalous dimension. PACS numbers : 11.10.H1, 11.40.-q, 11.55.Ds, 12.38.Bx, 13.85.Fb, 13.88.+e Work supported in part by EU contract FMRX-CT98-0194 (DG 12 MIHT) Electronic address: [email protected]
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تاریخ انتشار 2001