26-30 March 2012
University of Bonn
Europe/Berlin timezone

Resummation of large-x and small-x double logarithms in DIS and semi-inclusive e+e- annihilation

28 Mar 2012, 11:30
20m
Small Lecture Hall, Mathematical Institute (University of Bonn)

Small Lecture Hall, Mathematical Institute

University of Bonn

Hadronic final states/diffraction and vector mesons Combined: Hadronic final states/diffraction and vector mesons

Speaker

Andreas Vogt (University of Liverpool)

Description

Recently a method has been developed to extend the resummation of large-x double logarithms in inclusive DIS and semi-inclusive e^+e^- annihilation (SIA) to terms and quantities not addressed by the soft-gluon exponentiation. The N^nLL (leading log, next-to-leading log etc) resummation is based on N^nLO fixed-order results, the large-x structure of DIS and SIA in dimensional regularization and the all-order factorization of mass singularities. The same formalism can be applied to the dominant x-1 ln^{2*n-a-n_0} x terms in SIA splitting functions and coefficient functions and the (in the flavour-singlet case) subdominant x0 ln^{2*n-a-n_0} x contributions to (most of) their DIS counterparts. The talk addresses the theoretical basics of these resummations and presents the main numerical results which, despite all formal similarities, are qualitatively different for DIS and SIA.

Primary author

Andreas Vogt (University of Liverpool)

Co-authors

Andrea Almasy (University of Liverpool) Steve Kom (University of Liverpool)

Presentation materials