PoS - Proceedings of Science
Volume 282 - 38th International Conference on High Energy Physics (ICHEP2016) - Top Quark and Electroweak Physics
Higher-orders in heavy quark processes within the LTD approach
G. Sborlini
Full text: pdf
Pre-published on: February 06, 2017
Published on: April 19, 2017
Abstract
The computation of perturbative corrections to processes involving heavy quarks is crucial for
the precision program of the LHC and future colliders. In this article, we describe a powerful
approach to calculate higher-orders in QCD skipping the traditional subtraction method. Our
proposal is based on the loop-tree duality (LTD) theorem, which allows to rewrite virtual contributions
in terms of integrals over the real emission phase-space. Then, we proceed to combine
both real and virtual contributions at the integrand level, obtaining regular expressions that can
be numerically integrated in four space-time dimensions. In this way, we avoid dealing with
complicated massive Feynman integrals and introducing infrared counter-terms. Some reference
examples are explained, in order to exhibit the potential of our method.
DOI: https://doi.org/10.22323/1.282.0658
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