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Scientific article
Open access
English

Search for W′→tb→qqbb decays in pp collisions at √s = 8 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inEuropean physical journal. C, Particles and fields, vol. 75, no. 4, 165
Collection
  • Open Access - SCOAP3
Publication date2015
Abstract

A search for a massive W′ gauge boson decaying to a top quark and a bottom quark is performed with the ATLAS detector in pp collisions at the LHC. The dataset was taken at a centre-of-mass energy of √s = 8 TeV and corresponds to 20.3fb-1 of integrated luminosity. This analysis is done in the hadronic decay mode of the top quark, where novel jet substructure techniques are used to identify jets from high-momentum top quarks. This allows for a search for high-mass W′ bosons in the range 1.5–3.0  TeV. b -tagging is used to identify jets originating from b -quarks. The data are consistent with Standard Model background-only expectations, and upper limits at 95 % confidence level are set on the W′→tb cross section times branching ratio ranging from 0.16pb to 0.33pb for left-handed W′ bosons, and ranging from 0.10pb to 0.21pb for W′ bosons with purely right-handed couplings. Upper limits at 95 % confidence level are set on the W′ -boson coupling to tb as a function of the W′ mass using an effective field theory approach, which is independent of details of particular models predicting a W′ boson.

Citation (ISO format)
ATLAS Collaboration. Search for W′→tb→qqbb decays in pp collisions at √s = 8 TeV with the ATLAS detector. In: European physical journal. C, Particles and fields, 2015, vol. 75, n° 4, p. 165. doi: 10.1140/epjc/s10052-015-3372-2
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Article (Published version)
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ISSN of the journal1434-6044
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