Artículo
Collinear splitting, parton evolution and the strange-quark asymmetry of the nucleon in NNLO QCD
Fecha de publicación:
10/2004
Editorial:
North-holland
Revista:
Nuclear Physics B - Proceedings Supplements
ISSN:
0920-5632
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We consider the collinear limit of QCD amplitudes at one-loop order, and their factorization properties directly in colour space. These results apply to the multiple collinear limit of an arbitrary number of QCD partons, and are a basic ingredient in many higher-order computations. In particular, we discuss the triple collinear limit and its relation to flavour asymmetries in the QCD evolution of parton densities at three loops. As a phenomenological consequence of this new effect, and of the fact that the nucleon has non-vanishing quark valence densities, we study the perturbative generation of a strange-antistrange asymmetry s(x) - s̄(x) in the nucleon's sea. © 2004 Elsevier B.V. All rights reserved.
Palabras clave:
Strange
,
Splitting
,
Collinear
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Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
Rodrigo, Germán; Catani, Stefano; de Florian, Daniel Enrique; Vogelsang, Werner; Collinear splitting, parton evolution and the strange-quark asymmetry of the nucleon in NNLO QCD; North-holland; Nuclear Physics B - Proceedings Supplements; 135; 1-3 SPEC.ISS.; 10-2004; 188-192
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