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arXiv · 1611.05094

Higher-orders in heavy quark processes within the LTD approach

German F. R. Sborlini
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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.

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German F. R. Sborlini. 2016-11-15. Higher-orders in heavy quark processes within the LTD approach. https://arxiv.org/abs/1611.05094

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