The top quark jet-function at two loops

Details The top quark jet-function at two loops The top quark jet-function at two loops

2008-02-28

arxiv.org/abs/0802.4173v1

PoSRADCOR2007:055,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk presented at RADCOR07, October 1-5 2007, Florence, Italy

Scientific paper

Far above threshold the production process e^+e^-to t t-bar can be analyzed using effective field theories. In this talk we consider the invariant mass distribution of top-jets and report about our computation of the two-loop heavy quark jet-function. This is a key part of a next-to-next-to-leading order analysis, and already allows for a resummation of all large logs which effect the shape of the top-invariant mass distribution at next-to-next-to-leading log order. A top-mass scheme is defined which is suitable for measurements involving jets, and whose anomalous dimension is determined by the cusp-anomalous dimension to all orders in perturbation theory.

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