Chatrchyan, S;
Khachatryan, V;
Sirunyan, AM;
Tumasyan, A;
Adam, W;
Bergauer, T;
Dragicevic, M;
... CMS Collaboration, The; + view all
(2011)
Search for a vectorlike quark with charge 2/3 in t+Z events from pp collisions at √s=7 TeV.
Physical Review Letters
, 107
(27)
, Article 271802. 10.1103/PhysRevLett.107.271802.
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Abstract
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/c(2) is excluded at the 95% confidence level.
| Type: | Article |
|---|---|
| Title: | Search for a vectorlike quark with charge 2/3 in t+Z events from pp collisions at √s=7 TeV. |
| Location: | US |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.107.271802 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.107.271802 |
| Language: | English |
| Additional information: | © 2011 CERN, for the CMS Collaboration |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1335698 |
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