Higgs boson decay into b-quarks at NNLO accuracy

Del Duca, Vittorio and Duhr Claude, Claude and Somogyi, Gábor and Tramontano, Francesco and Trócsányi, Zoltán (2015) Higgs boson decay into b-quarks at NNLO accuracy. JOURNAL OF HIGH ENERGY PHYSICS (4). ISSN 1126-6708

Preview

Text 1501.07226.pdf Available under License Creative Commons Attribution. Download (641kB) | Preview

Abstract

We compute the fully differential decay rate of the Standard Model Higgs boson into b- quarks at next-to-next-to-leading order (NNLO) accuracy in αs. We employ a general subtraction scheme developed for the calculation of higher order perturbative corrections to QCD jet cross sections, which is based on the universal infrared factorization properties of QCD squared matrix elements. We show that the subtractions render the various contributions to the NNLO correction finite. In particular, we demonstrate analytically that the sum of integrated subtraction terms correctly reproduces the infrared poles of the two-loop double virtual contribution to this process. We present illustrative differential distributions obtained by implementing the method in a parton level Monte Carlo program. The basic ingredients of our subtraction scheme, used here for the first time to compute a physical observable, are universal and can be employed for the computation of more involved processes.

Actions (login required)

Edit Item