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Search for massive WH resonances decaying into the $\ell\nu\mathrm{b} \overline{\mathrm{b}}$ final state at $\sqrt{s}=8~\text {TeV}$


CMS Collaboration; Khachatryan, V; Sirunyan, A M; Tumasyan, A; et al (2016). Search for massive WH resonances decaying into the $\ell\nu\mathrm{b} \overline{\mathrm{b}}$ final state at $\sqrt{s}=8~\text {TeV}$. European Physical Journal C - Particles and Fields, 76:237.

Abstract

A search for a massive resonance ${\mathrm{W}^{\prime }}$decaying into a W and a Higgs boson in the $\ell \nu \mathrm{b} \overline{\mathrm{b}} (\ell = \mathrm {e}, \mu)$ final state is presented. Results are based on data corresponding to an integrated luminosity of $19.7\,\text {fb}^{{-1}}$ of proton–proton collisions at $\sqrt{s}=8~\text {TeV}$, collected using the CMS detector at the LHC. For a high-mass $(\gtrsim1~\text {TeV})$ resonance, the two bottom quarks coming from the Higgs boson decay are reconstructed as a single jet, which can be tagged by placing requirements on its substructure and flavour. Exclusion limits at 95 % confidence level are set on the production cross section of a narrow resonance decaying into WH, as a function of its mass. In the context of a little Higgs model, a lower limit on the ${\mathrm{W}^{\prime }}$ mass of $1.4~\text {TeV}$ is set. In a heavy vector triplet model that mimics the properties of composite Higgs models, a lower limit on the ${\mathrm{W}^{\prime }}$ mass of $1.5~\text {TeV}$ is set. In the context of this model, the results are combined with related searches to obtain a lower limit on the ${\mathrm{W}^{\prime }}$ mass of $1.8~\text {TeV}$, the most restrictive to date for decays to a pair of standard model bosons.

Abstract

A search for a massive resonance ${\mathrm{W}^{\prime }}$decaying into a W and a Higgs boson in the $\ell \nu \mathrm{b} \overline{\mathrm{b}} (\ell = \mathrm {e}, \mu)$ final state is presented. Results are based on data corresponding to an integrated luminosity of $19.7\,\text {fb}^{{-1}}$ of proton–proton collisions at $\sqrt{s}=8~\text {TeV}$, collected using the CMS detector at the LHC. For a high-mass $(\gtrsim1~\text {TeV})$ resonance, the two bottom quarks coming from the Higgs boson decay are reconstructed as a single jet, which can be tagged by placing requirements on its substructure and flavour. Exclusion limits at 95 % confidence level are set on the production cross section of a narrow resonance decaying into WH, as a function of its mass. In the context of a little Higgs model, a lower limit on the ${\mathrm{W}^{\prime }}$ mass of $1.4~\text {TeV}$ is set. In a heavy vector triplet model that mimics the properties of composite Higgs models, a lower limit on the ${\mathrm{W}^{\prime }}$ mass of $1.5~\text {TeV}$ is set. In the context of this model, the results are combined with related searches to obtain a lower limit on the ${\mathrm{W}^{\prime }}$ mass of $1.8~\text {TeV}$, the most restrictive to date for decays to a pair of standard model bosons.

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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2016
Deposited On:10 Jan 2017 10:44
Last Modified:02 Feb 2018 11:17
Publisher:Springer
ISSN:1434-6044
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1140/epjc/s10052-016-4067-z

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