We present the general expressions for the resummation, up to next-to-leading logarithmic accuracy, of Sudakov-type logarithms in processes with an arbitrary,number of hard-scattering partons. These results document the formulae used by the authors in several previous phenomenological studies. The resummation formulae presented here, which are valid for phase-space factorizable observables, determine the resummation correction in a process-independent fashion. All process dependence is encoded in the colour and flavour structure of the leading order and virtual one-loop amplitudes, and in Sudakov weights associated to the cross section kinematics. We explicitly illustrate the application to the case of Drell-Yan and prompt-photon production. (C) 2003 Published by Elsevier B.V.
Sudakov resummation of multiparton QCD cross sections / Bonciani, Roberto; Stefano, Catani; Michelangelo L., Mangano; Paolo, Nason. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 575:3-4(2003), pp. 268-278. [10.1016/j.physletb.2003.09.068]
Sudakov resummation of multiparton QCD cross sections
BONCIANI, ROBERTO;
2003
Abstract
We present the general expressions for the resummation, up to next-to-leading logarithmic accuracy, of Sudakov-type logarithms in processes with an arbitrary,number of hard-scattering partons. These results document the formulae used by the authors in several previous phenomenological studies. The resummation formulae presented here, which are valid for phase-space factorizable observables, determine the resummation correction in a process-independent fashion. All process dependence is encoded in the colour and flavour structure of the leading order and virtual one-loop amplitudes, and in Sudakov weights associated to the cross section kinematics. We explicitly illustrate the application to the case of Drell-Yan and prompt-photon production. (C) 2003 Published by Elsevier B.V.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
