Probing the Higgs coupling to top quark in events with associated Higgs production with top-anti top pair and Higgs decay in two photons

Francesco Micheli

doi:10.1051/epjconf/20136020022

EPJ

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Proceedings

Open Access

EPJ Web of Conferences 60, 20022 (2013)
https://doi.org/10.1051/epjconf/20136020022

Probing the Higgs coupling to top quark in events with associated Higgs production with top-anti top pair and Higgs decay in two photons

Francesco Micheli¹^,2^a

¹ Sapienza, Universitá di Roma
² INFN, Sezione di Roma

^a e-mail: francesco.micheli@cern.ch

Published online: 26 November 2013

Abstract

We present here the results of the first search for the associated production of the Higgs boson with a $t \bar{t}$ $t\bar t$ pair, using the events where the Higgs boson decays to two photons in CMS. In order to maximize acceptance and sensitivity to such a small signal, we device two di_erent sets of event selection criteria, optimized for leptonic and all-hadronic $t \bar{t}$ $t\bar t$ decays. In the absence of a significant excess over the background-only predictions, we proceed to set an observed (expected) 95% confidence level upper limit on $t \bar{t}$ $t\bar t$ H production cross section times BR(H → γγ) of 5.4 (5.3) times the Standard model value using 19.6 fb⁻¹ of 8 TeV pp collisions.

© Owned by the authors, published by EDP Sciences, 2013

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.