CMS-HIG-16-027

CMS-HIG-16-027 ; CERN-EP-2017-068
Search for charged Higgs bosons produced via vector boson fusion and decaying into a pair of W and Z bosons using proton-proton collisions at $\sqrt{s} = $ 13 TeV
CMS Collaboration
8 May 2017
Phys. Rev. Lett. 119 (2017) 141802
Abstract: A search for charged Higgs bosons produced via vector boson fusion and decaying into W and Z bosons using proton-proton collisions at $\sqrt{s}= $ 13 TeV is presented. The data sample corresponds to an integrated luminosity of 15.2 fb$^{-1}$ collected with the CMS detector in 2015 and 2016. The event selection requires three leptons (electrons or muons), two jets with large pseudorapidity separation and high dijet mass, and missing transverse momentum. The observation agrees with the standard model prediction. Limits on the vector boson fusion production cross section times branching fraction for new charged physical states are reported as a function of mass from 200 to 2000 GeV and interpreted in the context of Higgs triplet models.
Links: e-print arXiv:1705.02942 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; HepData record ; CADI line (restricted) ;

Figures & Tables	Summary	References	CMS Publications

Figures
png pdf	Figure 1: Feynman diagram showing the production of charged Higgs bosons via VBF.
png pdf	Figure 2: Transverse mass distributions after full selection, for data collected in 2015 (left) and 2016 (right). The background yield predictions correspond to the background-only hypothesis fit result. The signal distribution is shown for $m(\mathrm{H}^{\pm}) = $ 700 GeV and the cross-section prediction in the GM model at $s_{\mathrm{ H } }= $ 0.7.
png pdf	Figure 2-a: Transverse mass distribution after full selection, for data collected in 2015. The background yield predictions correspond to the background-only hypothesis fit result. The signal distribution is shown for $m(\mathrm{H}^{\pm}) = $ 700 GeV and the cross-section prediction in the GM model at $s_{\mathrm{ H } }= $ 0.7.
png pdf	Figure 2-b: Transverse mass distributions after full selection, for data collected in 2016. The background yield predictions correspond to the background-only hypothesis fit result. The signal distribution is shown for $m(\mathrm{H}^{\pm}) = $ 700 GeV and the cross-section prediction in the GM model at $s_{\mathrm{ H } }= $ 0.7.
png pdf	Figure 3: Expected and observed exclusion limits at 95% confidence level as a function of $m(\mathrm{H}^{\pm})$ for $\sigma _\mathrm {VBF}(\mathrm{H}^{\pm}) \mathcal {B}(\mathrm{H}^{\pm} \to \mathrm{ W } {\mathrm{ Z } })$ (left) and on the ratio of vacuum expectation values in the GM model (right) for 15.2 fb$^{-1}$ of proton-proton collisions at 13 TeV collected in 2015 and 2016. The blue shaded area covers the theoretically not allowed parameter space [64].
png pdf	Figure 3-a: Expected and observed exclusion limits at 95% confidence level as a function of $m(\mathrm{H}^{\pm})$ for $\sigma _\mathrm {VBF}(\mathrm{H}^{\pm}) \mathcal {B}(\mathrm{H}^{\pm} \to \mathrm{ W } {\mathrm{ Z } })$ for 15.2 fb$^{-1}$ of proton-proton collisions at 13 TeV collected in 2015 and 2016.
png pdf	Figure 3-b: Expected and observed exclusion limits at 95% confidence level as a function of $m(\mathrm{H}^{\pm})$ on the ratio of vacuum expectation values in the GM model for 15.2 fb$^{-1}$ of proton-proton collisions at 13 TeV collected in 2015 and 2016. The blue shaded area covers the theoretically not allowed parameter space [64].

Tables
png pdf	Table 1: Relative systematic uncertainties in the estimated signal and background yields, in units of percent.
png pdf	Table 2: Yields of selected events in 2015 and 2016 data, together with the expected yields from various background processes. The statistical and systematic uncertainties are shown. The signal yields are shown for values of $s_{\mathrm{ H } }= $ 0.7.

Summary

In summary, we present a search for charged Higgs bosons produced via vector boson fusion and decaying into W and Z bosons in proton-proton collisions at $\sqrt{s} = $ 13 TeV based on a sample corresponding to an integrated luminosity of 15.2 fb$^{-1}$. Events are required to have three leptons (electrons or muons), two jets with large pseudorapidity separation and high dijet mass, and missing transverse momentum. The number of events observed in the signal region agrees with the standard model prediction. The first limits on $\sigma_\mathrm{VBF}(\mathrm{H}^{\pm})\, \mathcal{B}(\mathrm{H}^{\pm}\to \mathrm{WZ})$ at $\sqrt{s} = $ 13 TeV are obtained. The results are interpreted in the Georgi--Machacek model for which the most stringent limits are derived.

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