Title
Search for heavy quarks decaying into a top quark and a W or Z boson using lepton + jets events in pp collisions at <tex>$\sqrt{s}=7TeV$</tex>Search for heavy quarks decaying into a top quark and a W or Z boson using lepton + jets events in pp collisions at <tex>$\sqrt{s}=7TeV$</tex>
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Elementary Particle Physics
Department of Physics
Publication type
article
Publication
Bristol,
Subject
Physics
Source (journal)
Journal of high energy physics. - Bristol
Volume/pages
(2013):1, 30 p.
ISSN
1126-6708
1029-8479
1029-8479
Article Reference
154
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Results are presented from a search for the pair-production of heavy quarks, Q (A) over bar, that decay exclusively into a top quark and a W or Z boson. The search is performed using a sample of proton-proton collisions at root s = 7TeV corresponding to an integrated luminosity of 5.0 fb(-1), collected by the Compact Muon Solenoid experiment. The signal region is defined using a sample of events containing one electron or muon, missing transverse momentum, and at least four jets with large transverse momenta, where one jet is likely to originate from the decay of a bottom quark. No significant excess of events is observed with respect to the standard model expectations. Assuming a strong pair-production mechanism, quark masses below 675 (625) GeV decaying into tW (tZ) are excluded at the 95% confidence level.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/d00d82/4006.pdf
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