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Title
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Search for a vectorlike quark with charge 2/3 in t+Z events from pp collisions at = 7 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 for pair-produced heavy vectorlike charge-2/3 quarks, T, in pp collisions at a center-of-mass energy of 7 TeV, is performed with the CMS detector at the LHC. Events consistent with the flavor-changing-neutral-current decay of a T quark to a top quark and a Z boson are selected by requiring two leptons from the Z-boson decay, as well as an additional isolated charged lepton. In a data sample corresponding to an integrated luminosity of 1.14 fb-1, the number of observed events is found to be consistent with the standard model background prediction. Assuming a branching fraction of 100% for the decay T→tZ, a T quark with a mass less than 475 GeV/c2 is excluded at the 95% confidence level. |
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Language
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English
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Source (journal)
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Physical review letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
:
American Physical Society
,
2011
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ISSN
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0031-9007
[print]
1079-7114
[online]
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DOI
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10.1103/PHYSREVLETT.107.271802
10.1103/PHYSREVD.75.054010
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Volume/pages
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107
:27
(2011)
, p. 1-15
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Article Reference
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271802
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ISI
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000298611000010
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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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