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  4. Search for heavy resonances decaying into two Higgs bosons or into a Higgs boson and a W or Z boson in proton-proton collisions at 13 TeV
 
research article

Search for heavy resonances decaying into two Higgs bosons or into a Higgs boson and a W or Z boson in proton-proton collisions at 13 TeV

Sirunyan, Albert M
•
Tumasyan, Armen
•
Adam, Wolfgang
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January 7, 2019
Journal of High Energy Physics

A search is presented for massive narrow resonances decaying either into two Higgs bosons, or into a Higgs boson and a W or Z boson. The decay channels considered are $ \mathrm{H}\mathrm{H}\to \mathrm{b}\overline{\mathrm{b}}{\tau}^{+}{\tau}^{-} $ and $ \mathrm{V}\mathrm{H}\to \mathrm{q}\overline{\mathrm{q}}{\tau}^{+}{\tau}^{-} $ , where H denotes the Higgs boson, and V denotes the W or Z boson. This analysis is based on a data sample of proton-proton collisions collected at a center-of-mass energy of 13 TeV by the CMS Collaboration, corresponding to an integrated luminosity of 35.9 fb$^{−1}$. For the TeV-scale mass resonances considered, substructure techniques provide ways to differentiate among the hadronization products from vector boson decays to quarks, Higgs boson decays to bottom quarks, and quark- or gluon-induced jets. Reconstruction techniques are used that have been specifically optimized to select events in which the tau lepton pair is highly boosted. The observed data are consistent with standard model expectations and upper limits are set at 95% confidence level on the product of cross section and branching fraction for resonance masses between 0.9 and 4.0 TeV. Exclusion limits are set in the context of bulk radion and graviton models:spin-0 radion resonances are excluded below a mass of 2.7 TeV at 95% confidence level. In the spin-1 heavy vector triplet framework, mass-degenerate W′ and Z′ resonances with dominant couplings to the standard model gauge bosons are excluded below a mass of 2.8 TeV at 95% confidence level. These are the first limits for massive resonances at the TeV scale with these decay channels at $ \sqrt{s}=13 $ TeV.

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Type
research article
DOI
10.1007/JHEP01(2019)051
ArXiv ID

1808.01365

Author(s)
Sirunyan, Albert M
Tumasyan, Armen
Adam, Wolfgang
Ambrogi, Federico
Asilar, Ece
Bergauer, Thomas
Brandstetter, Johannes
Brondolin, Erica
Dragicevic, Marko
Erö, Janos
Show more
Date Issued

2019-01-07

Publisher

Springer Nature

Published in
Journal of High Energy Physics
Start page

51

Subjects

p p: colliding beams

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Higgs particle: pair production

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Z0: associated production

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W: associated production

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Higgs particle: associated production

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resonance: production

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resonance: mass

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resonance: massive

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spin: resonance

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spin: 0

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spin: 1

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p p: scattering

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Higgs particle: leptonic decay

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tau: pair production

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vector boson: hadronic decay

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Higgs particle: hadronic decay

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bottom: pair production

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resonance: heavy

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scale: TeV

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gravitation: model

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model: graviton

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radion

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narrow resonance

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channel cross section: branching ratio: upper limit

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hadronization

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gauge boson: coupling

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W'

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Z'

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structure

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triplet

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CMS

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CERN LHC Coll

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experimental results

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13000 GeV-cms

Note

This article is licensed under a Creative Commons Attribution 4.0 International License

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LPHE  
Available on Infoscience
February 17, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/166166
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