Next-to-leading order effects on a transversity bound
نویسندگان
چکیده
منابع مشابه
Next-to-leading order QCD evolution of transversity fragmentation functions
We derive the next-to-leading order splitting kernels for the scale evolution of fragmentation functions for transversely polarized quarks into transversely polarized hadrons. Very little is known so far about spin effects in fragmentation of partons into hadrons. An exception is semi-inclusive production of Λ baryons in e+e−, ep, or pp scattering, where the polarization of the Λ has been obser...
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The feasibility of measuring chiral-odd parton distribution functions in polarized Drell-Yan and semi-inclusive experiments has renewed theoretical interest in their study. Not long ago we presented an analysis of the transversity distribution functions using models of hadron structure and Leading Order evolution. In the meantime Next to Leading Order evolution equations for h 1 are also availa...
متن کاملNext - to - leading order Q 2 - evolution of the transversity distribution h 1 ( x , Q 2 )
We present a calculation of the two-loop anomalous dimension for the transversity distribution h1(x,Q ), γ n , in the MS scheme of the dimensional regularization. Due to the chiral-odd nature, h1 does not mix with the gluon distributions, and thus our result is the same for the flavor-singlet and nonsinglet distributions. At small n (moment of h1), γ h(1) n is significantly larger than γ n (the...
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We present a calculation of the two-loop splitting functions for the evolution of the twist-2 ’transversity’ parton densities of transversely polarized nucleons. We study the implications of our results for Soffer’s inequality for the case of valence quark densities. PACS numbers: 13.88.+e, 12.38.Bx CERN-TH/97-132 June 1997
متن کاملAnnihilation to Next-to-leading Order Accuracy *
We discuss the production of two hadrons in e + e − annihilation within the framework of perturbative QCD. The cross section for this process is calculated to next-to-leading order accuracy with a selection of variables that allows the consideration of events where the two hadrons are detected in the same jet. In this configuration we contemplate the possibility that the hadrons come from a dou...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1998
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(98)01280-5