Title
Search for pair-produced vectorlike B quarks in proton-proton collisions at <tex>$\sqrt{s}$</tex>=8 TeV Search for pair-produced vectorlike B quarks in proton-proton collisions at <tex>$\sqrt{s}$</tex>=8 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Subject
Physics
Source (journal)
PHYSICAL REVIEW D
Volume/pages
93(2016) :11 , 32 p.
ISSN
2470-0010
Article Reference
112009
ISI
000377805100001
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
A search for the production of a heavy B quark, having electric charge -1/3 and vector couplings to W, Z, and H bosons, is carried out using proton-proton collision data recorded at the CERN LHC by the CMS experiment, corresponding to an integrated luminosity of 19.7 fb(-1). The B quark is assumed to be pair produced and to decay in one of three ways: to tW, bZ, or bH. The search is carried out in final states with one, two, and more than two charged leptons, as well as in fully hadronic final states. Each of the channels in the exclusive final-state topologies is designed to be sensitive to specific combinations of the B quark-antiquark pair decays. The observed event yields are found to be consistent with the standard model expectations in all the final states studied. A statistical combination of these results is performed, and upper limits are set on the cross section of the strongly produced B quark-antiquark pairs as a function of the B quark mass. Lower limits on the B quark mass between 740 and 900 GeVare set at a 95% confidence level, depending on the values of the branching fractions of the B quark to tW, bZ, and bH. Overall, these limits are the most stringent to date.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/fa5ae7/134600.pdf
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