Search for invisible decays of a Higgs boson produced through vector boson fusion in proton-proton collisions at root s=13 TeV

Sirunyan, AM and Tumasyan, A and Adam, W and Ambrogi, F and Komaragiri, JR and Choudhury, S and Tiwari, PC (2019) Search for invisible decays of a Higgs boson produced through vector boson fusion in proton-proton collisions at root s=13 TeV. In: PHYSICS LETTERS B, 793 . pp. 520-551.

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Abstract

A search for invisible decays of a Higgs boson is performed using proton-proton collision data collected with the CMS detector at the LHC in 2016 at a center-of-mass energy root s = 13 TeV, corresponding to an integrated luminosity of 35.9fb(-1). The search targets the production of a Higgs boson via vector boson fusion. The data are found to be in agreement with the background contributions from standard model processes. An observed (expected) upper limit of 0.33(0.25), at 95% confidence level, is placed on the branching fraction of the Higgs boson decay to invisible particles, assuming standard model production rates and a Higgs boson mass of 125.09GeV. Results from a combination of this analysis and other direct searches for invisible decays of the Higgs boson, performed using data collected at root s = 7, 8, and 13 TeV, are presented. An observed (expected) upper limit of 0.19(0.15), at 95% confidence level, is set on the branching fraction of invisible decays of the Higgs boson. The combined limit represents the most stringent bound on the invisible branching fraction of the Higgs boson reported to date. This result is also interpreted in the context of Higgs-portal dark matter models, in which upper bounds are placed on the spin-independent dark-matter-nucleon scattering cross section. (C) 2019 The Author(s). Published by Elsevier B.V.

Item Type:	Journal Article
Publication:	PHYSICS LETTERS B
Publisher:	ELSEVIER SCIENCE BV
Additional Information:	copyright for this article belongs to PHYSICS LETTERS B
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	26 Jun 2019 15:07
Last Modified:	26 Jun 2019 15:07
URI:	http://eprints.iisc.ac.in/id/eprint/63096

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