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 √s = 13 TeV

• Autor(a) principal: Sirunyan, A. M.
• Data de Publicação: 2019
• Outros Autores: Silveira, Gustavo Gil da, CMS Collaboration
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/194655
• topic: Aceleradores de partículas; Colisões proton-proton; Bosons de higgs; Beyond standard model; Hadron-Hadron scattering (experiments); Higgs 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 HH ! b b + and VH ! q q + , 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 13TeV by the CMS Collaboration, corresponding to an integrated luminosity of 35.9 fb1. For the TeV-scale mass resonances considered, substructure techniques provide ways to di erentiate 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 speci cally 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% con dence level on the product of cross section and branching fraction for resonance masses between 0.9 and 4.0TeV. Exclusion limits are set in the context of bulk radion and graviton models: spin-0 radion resonances are excluded below a mass of 2.7TeV at 95% con dence level. In the spin-1 heavy vector triplet framework, mass-degenerate W0 and Z0 resonances with dominant couplings to the standard model gauge bosons are excluded below a mass of 2.8TeV at 95% con dence level. These are the rst limits for massive resonances at the TeV scale with these decay channels at p s = 13TeV.