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arXiv · 1303.1397

A complete O(alpha_S^2) calculation of the signal-background interference for the Higgs diphoton decay channel

Daniel de Florian·Nerina Fidanza·R. J. Hernández-Pinto·Javier Mazzitelli·Yamila Rotstein Habarnau·German F. R. Sborlini
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Abstract

We present the full ${\cal O}(\as^2)$ computation of the interference effects between the Higgs diphoton signal and the continuum background at the LHC. While the main contribution to the interference originates on the $gg$ partonic subprocess, we find that the corrections from the $qg$ and $q\bar{q}$ channels amount up to 35% of it. We discuss the effect of these new subprocesses in the shift of the diphoton invariant mass peak recently reported by S. Martin in Ref.\cite{Martin:2012xc}.

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Daniel de Florian, Nerina Fidanza, R. J. Hernández-Pinto, Javier Mazzitelli, Yamila Rotstein Habarnau, German F. R. Sborlini. 2013-03-06. A complete O(alpha_S^2) calculation of the signal-background interference for the Higgs diphoton decay channel. https://doi.org/10.1140/epjc%2Fs10052-013-2387-9

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