Search for W' → tb → qqbb decays in pp collisions at √s = 8 TeV with the ATLAS detector G. Aad, B. Abbott, J. Abdallah [et.al.]
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ArticleSubject(s): ATLAS, детектор | Большой адронный коллайдер | бозоны | столкновение частицGenre/Form: статьи в журналах Online resources: Click here to access online
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The European physical journal C Vol. 75, № 4. P. 165 (1-23)Abstract: A search for a massive W gauge boson decaying to a top quark and a bottom quark is performed with theATLAS detector in pp collisions at the LHC. The dataset was taken at a centre-of-mass energy of √s = 8 TeV and corresponds to 20.3 fb−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
0.16 pb to 0.33 pb for left-handed W bosons, and ranging from 0.10 pb to 0.21 pb for W bosons with purely righthanded 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.
Библиогр.: 61 назв.
A search for a massive W gauge boson decaying to a top quark and a bottom quark is performed with theATLAS detector in pp collisions at the LHC. The dataset was taken at a centre-of-mass energy of √s = 8 TeV and corresponds to 20.3 fb−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
0.16 pb to 0.33 pb for left-handed W bosons, and ranging from 0.10 pb to 0.21 pb for W bosons with purely righthanded 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.
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