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Principles of general final-state resummation and automated implementation

Andrea Banfi1, Gavin P. Salam2 and Giulia Zanderighi3

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Next-to-leading logarithmic final-state resummed predictions have traditionally been calculated, manually, separately for each observable. In this article we derive NLL resummed results for generic observables. We highlight and discuss the conditions that the observable should satisfy for the approach to be valid, in particular continuous globalness and recursive infrared and collinear safety. The resulting resummation formula is expressed in terms of certain well-defined characteristics of the observable. We have written a computer program, \textsc{caesar}\xspace, which, given a subroutine for an arbitrary observable, determines those characteristics, enabling full automation of a large class of final-state resummations, in a range of processes.

Keywords

Jets

Hadronic Colliders

QCD

NLO Computations

 

E-print Number: hep-ph/0407286

Cited: by |

Refers: to

PACS

12.38.Aw General properties of QCD (dynamics, confinement, etc.)

Subjects

Particle physics and field theory

Dates

Issue 03 (March 2005)

Received 27 July 2004, accepted for publication 27 March 2005

Published 11 May 2005



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