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Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

CMS Collaboration; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; König, A.; Krammer, M.; ... mehr

Abstract (englisch):
A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at s √ =8TeV. The data correspond to an integrated luminosity of 19.7fb −1. The search considers HH resonances with masses between 1 and 3TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and tt ¯ events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95 % confidence level for the product of the production cross section and branching fraction σ(gg→X)B(X→HH→bb ¯ ¯ ¯ bb ¯ ¯ ¯ ) range from 10 to 1.5\,fb for the mass of X from 1.15 to 2.0TeV, significantly extending previous searches. For a warped extra dimension theory with a mass scale Λ R =1 TeV, the data exclude radion scalar masses between 1.15 and 1.55TeV.

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DOI: 10.5445/IR/1000059578
DOI: 10.1140/epjc/s10052-016-4206-6
Zitationen: 24
Web of Science
Zitationen: 25
Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator ISSN: 1434-6044
KITopen-ID: 1000059578
Erschienen in The European physical journal / C
Band 76
Heft 7
Seiten 371
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Nachgewiesen in Web of Science
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