Search for nonresonant Higgs boson pair production in final states with two bottom quarks and two photons in proton-proton collisions at √ s=13 TeV
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Sirunyan, A.M.; Brochero Cifuentes, Javier Andrés; Cabrillo Bartolomé, José Ibán; Calderón Tazón, Alicia; Chazin Quero, Bárbara; Duarte Campderros, Jorge; Fernández García, Marcos; Fernández Madrazo, Celia; Fernández Manteca, Pedro José; García Alonso, Andrea; Gómez Gramuglio, Gervasio; Martínez Rivero, Celso; Martínez Ruiz del Árbol, Pablo; Matorras Weinig, Francisco; Piedra Gómez, Jonatan; Prieëls, Cedric; Ricci-Tam, Francesca Shun-Ning Annarosa; Rodrigo Anoro, Teresa; Ruiz Jimeno, Alberto; [et al.]Fecha
2021-03-29Derechos
Attribution 4.0 International © CERN, for the benefit of the CMS collaboration
Publicado en
Journal of High Energy Physics, 2021, 03, 257
Editorial
Springer Verlag
Palabras clave
Hadron-Hadron scattering (experiments)
Higgs physics
Resumen/Abstract
A search for nonresonant production of Higgs boson pairs via gluon-gluon and vector boson fusion processes in final states with two bottom quarks and two photons is presented. The search uses data from proton-proton collisions at a center-of-mass energy of p s = 13TeV recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb−1. No significant deviation from the background-only hypothesis is observed. An upper limit at 95% confidence level is set on the product of the Higgs boson pair production cross section and branching fraction into bb. The observed (expected) upper limit is determined to be 0.67 (0.45) fb, which corresponds to 7.7 (5.2) times the standard model prediction. This search has the highest sensitivity to Higgs boson pair production to date. Assuming all other Higgs boson couplings are equal to their values in the standard model, the observed coupling modifiers of the trilinear Higgs boson selfcoupling __ and the coupling between a pair of Higgs bosons and a pair of vector bosons c2V are constrained within the ranges −3.3 < __ < 8.5 and −1.3 < c2V < 3.5 at 95% confidence level. Constraints on __ are also set by combining this analysis with a search for single Higgs bosons decaying to two photons, produced in association with top quarkantiquark pairs, and by performing a simultaneous fit of __ and the top quark Yukawa coupling modifier _t.
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