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Title
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Search for the production of an excited bottom quark decaying to tW in proton-proton collisions at =8 TeV
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Author
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Institution/Organisation
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Cms Collaboration
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Abstract
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| A search is presented for a singly produced excited bottom quark (b*) decaying to a top quark and a W boson in the all-hadronic, lepton+jets, and dilepton final states in proton-proton collisions at root s = 8 TeV recorded by the CMS experiment at the CERN LHC. Data corresponding to an integrated luminosity of 19.7 fb(-1) are used. No significant excess of events is observed with respect to standard model expectations. We set limits at 95% confidence on the product of the b* quark production cross section and its branching fraction to tW. The cross section limits are interpreted for scenarios including left-handed, right-handed, and vector-like couplings of the b* quark and are presented in the two-dimensional coupling plane based on the production and decay coupling constants. The masses of the left-handed, right-handed, and vector-like b* quark states are excluded at 95% confidence below 1390, 1430, and 1530 GeV, respectively, for benchmark couplings. This analysis gives the most stringent limits on the mass of the b* quark to date. |
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Language
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English
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Source (journal)
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Journal of high energy physics. - Bristol
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Publication
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Bristol
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2016
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ISSN
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1126-6708
1029-8479
[online]
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DOI
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10.1007/JHEP01(2016)166
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Volume/pages
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1
(2016)
, 44 p.
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Article Reference
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166
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ISI
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000369302300001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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