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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.
Fuente: Journal of High Energy Physics, 2021, 2021(3), 257
Editorial: Springer Verlag
Fecha de publicación: 29/03/2021
Nº de páginas: 57
Tipo de publicación: Artículo de Revista
DOI: 10.1007/JHEP03(2021)257
ISSN: 1126-6708,1029-8479
Url de la publicación: https://doi.org/10.1007/JHEP03(2021)257
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SIRUNYAN, A.M.
JAVIER ANDRES BROCHERO CIFUENTES
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
CELIA FERNANDEZ MADRAZO
PEDRO JOSE FERNANDEZ MANTECA
ANDREA GARCIA ALONSO
GERVASIO GOMEZ GRAMUGLIO
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
FRANCESCA SHUN-NING ANNAROSA RICCI-TAM
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
NICOLO TREVISANI
IVAN VILA ALVAREZ
JESUS MANUEL VIZAN GARCIA
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