Recoil and Threshold Corrections in Short-distance Cross Sections

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We identify and resum corrections associated with the kinematic recoil of the hard scattering against soft-gluon emission in single-particle inclusive cross sections. The method avoids double counting and conserves the flow of partonic energy. It reproduces threshold resummation for high-p_T single-particle cross sections, when recoil is neglected, and Q_T-resummation at low Q_T, when higher-order threshold logarithms are suppressed. We exhibit explicit resummed cross sections, accurate to next-to-leading logarithm, for electroweak annihilation and prompt photon inclusive cross sections.
minor modifications of the text, some references added. 51 pages, LaTeX, 6 figures as eps files

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/207536

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-ph/0010080
 http://arxiv.org/abs/hep-ph/0010080
 Phys.Rev.D63:114018,2001
 doi:10.1103/PhysRevD.63.114018

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arXiv