Search for Higgs boson pair production in the gamma gamma b(b)over-bar final state in pp collisions at root s=13 TeV



Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Eroe, J
et al (show 2280 more authors) (2019) Search for Higgs boson pair production in the gamma gamma b(b)over-bar final state in pp collisions at root s=13 TeV. PHYSICS LETTERS B, 788. pp. 7-36.

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Abstract

A search is presented for the production of a pair of Higgs bosons, where one decays into two photons and the other one into a bottom quark–antiquark pair. The analysis is performed using proton–proton collision data at s=13TeV recorded in 2016 by the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9fb−1. The results are in agreement with standard model (SM) predictions. In a search for resonant production, upper limits are set on the cross section for new spin-0 or spin-2 particles. For the SM-like nonresonant production hypothesis, the data exclude a product of cross section and branching fraction larger than 2.0fb at 95% confidence level (CL), corresponding to about 24 times the SM prediction. Values of the effective Higgs boson self-coupling κλ are constrained to be within the range −11<κλ<17 at 95% CL, assuming all other Higgs boson couplings are at their SM value. The constraints on κλ are the most restrictive to date.

Item Type: Article
Uncontrolled Keywords: CMS, Physics, Higgs, Photons, b-Jets
Depositing User: Symplectic Admin
Date Deposited: 09 May 2019 10:16
Last Modified: 19 Jan 2023 00:47
DOI: 10.1016/j.physletb.2018.10.056
Open Access URL: https://doi.org/10.1016/j.physletb.2018.10.056
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3040417