Next-to-next-to-leading order evolution of non-singlet fragmentation functions
نویسندگان
چکیده
منابع مشابه
Next-to-Next-to-Leading Order Evolution of Non-Singlet Fragmentation Functions
We have investigated the next-to-next-to-leading order (NNLO) corrections to inclusive hadron production in e+e− annihilation and the related parton fragmentation distributions, the ‘time-like’ counterparts of the ‘space-like’ deep-inelastic structure functions and parton densities. We have re-derived the corresponding second-order coefficient functions in massless perturbative QCD, which so fa...
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We present a brief description of the determination of the two-loop spindependent time-like splitting functions relevant for the NLO evolution of polarized fragmentation functions. Our calculation based on the analytic continuation of the corresponding space-like results obtained within the light-cone gauge method proposed by Curci, Furmanski, and Petronzio. As an application we present an anal...
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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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We determine the two-loop ’time-like’ Altarelli-Parisi splitting functions, appearing in the next-to-leading order Q-evolution equations for fragmentation functions, via analytic continuation of the corresponding ’space-like’ splitting functions for the evolution of parton distributions. We do this for the case of unpolarized fragmentation functions and for the first time also for the functions...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2006
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2006.05.005