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Abstract: Far above threshold the production process e^+e^-to t t-bar can be analyzedusing effective field theories. In this talk we consider the invariant massdistribution of top-jets and report about our computation of the two-loop heavyquark jet-function. This is a key part of a next-to-next-to-leading orderanalysis, and already allows for a resummation of all large logs which effectthe shape of the top-invariant mass distribution at next-to-next-to-leading logorder. A top-mass scheme is defined which is suitable for measurementsinvolving jets, and whose anomalous dimension is determined by thecusp-anomalous dimension to all orders in perturbation theory.



Autor: Ambar Jain, Ignazio Scimemi, Iain W. Stewart

Fuente: https://arxiv.org/







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