A complete calculation of the signal–background interference for the Higgs diphoton decay channel

Daniel de Florian; Nerina Fidanza; Roger Hernández-Pinto; Javier Mazzitelli; Yamila Rotstein Habarnau; Germán Sborlini

doi:10.1140/epjc/s10052-013-2387-9

EPJ

A complete $Mathematical equation: $\mathcal{O}(\alpha_{\mathrm{S}}^{2})$$ calculation of the signal–background interference for the Higgs diphoton decay channel

Daniel de Florian, Nerina Fidanza, Roger Hernández-Pinto, Javier Mazzitelli, Yamila Rotstein Habarnau and Germán Sborlini^*

Departamento de Física, FCEyN, Universidad de Buenos Aires, (1428) Pabellón 1, Ciudad Universitaria, Capital Federal, Argentina

^* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Received: 6 March 2013
Published online: 9 April 2013

Abstract

We present the full $Mathematical equation: $\mathcal{O}(\alpha_{\mathrm{S}}^{2})$$ computation of the interference effects between the Higgs diphoton signal and the continuum background at the LHC. While the main contribution to the interference originates on the gg partonic subprocess, we find that the corrections from the qg and $Mathematical equation: $q\bar{q}$$ 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 (Phys. Rev. D 86:073016, 2012).

International School of Cosmic Ray Astrophysics
24th Course: “Particles and the Cosmos”
29 July – 6 August 2026
Erice, Italy

EPJ

A complete calculation of the signal–background interference for the Higgs diphoton decay channel

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A complete $Mathematical equation: $\mathcal{O}(\alpha_{\mathrm{S}}^{2})$$ calculation of the signal–background interference for the Higgs diphoton decay channel