A search for a massive resonance W′decaying into a W and a Higgs boson in the lνb bar-b(l=e,μ) final state is presented. Results are based on data corresponding to an integrated luminosity of 19.7 fb−1 of proton–proton collisions at √s = 8 TeV, collected using the CMS detector at the LHC. For a high-mass (>=1 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 W′ mass of 1.4 TeV is set. In a heavy vector triplet model that mimics the properties of composite Higgs models, a lower limit on the W′ mass of 1.5 TeV is set. In the context of this model, the results are combined with related searches to obtain a lower limit on the W′ mass of 1.8 TeV, the most restrictive to date for decays to a pair of standard model bosons.

Search for massive WH resonances decaying into the ℓνb bar-b final state at √s = 8 TeV

SOLA, VALENTINA;AMAPANE, Nicola Carlo;ARGIRO', Stefano;BELLAN, Riccardo;COSTA, Marco;COVARELLI, Roberto;MIGLIORE, Ernesto;MONACO, Vincenzo;OBERTINO, Maria Margherita;PACHER, LUCA;PELLICCIONI, Mario;PINNA ANGIONI, GIAN LUCA;RAVERA, FABIO;ROMERO, Alessandra;SACCHI, Roberto;SOLANO, Ada Maria;
2016-01-01

Abstract

A search for a massive resonance W′decaying into a W and a Higgs boson in the lνb bar-b(l=e,μ) final state is presented. Results are based on data corresponding to an integrated luminosity of 19.7 fb−1 of proton–proton collisions at √s = 8 TeV, collected using the CMS detector at the LHC. For a high-mass (>=1 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 W′ mass of 1.4 TeV is set. In a heavy vector triplet model that mimics the properties of composite Higgs models, a lower limit on the W′ mass of 1.5 TeV is set. In the context of this model, the results are combined with related searches to obtain a lower limit on the W′ mass of 1.8 TeV, the most restrictive to date for decays to a pair of standard model bosons.
2016
76
5
1
26
http://link.springer-ny.com/link/service/journals/10052/index.htm
Engineering (miscellaneous); Physics and Astronomy (miscellaneous)
Khachatryan, V.; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1639570
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