Title
Search for a vectorlike quark with charge 2/3 in t+Z events from pp collisions at √s=7TeV
Date Issued
29 December 2011
Access level
open access
Resource Type
journal article
Author(s)
Chatrchyan S.
Khachatryan V.
Sirunyan A.M.
Tumasyan A.
Adam W.
Bergauer T.
Dragicevic M.
Erö J.
Fabjan C.
Friedl M.
Frühwirth R.
Ghete V.M.
Hammer J.
Hänsel S.
Hoch M.
Hörmann N.
Hrubec J.
Jeitler M.
Kiesenhofer W.
Krammer M.
Liko D.
Mikulec I.
Pernicka M.
Rahbaran B.
Rohringer H.
Schöfbeck R.
Strauss J.
Taurok A.
Teischinger F.
Trauner C.
Wagner P.
Waltenberger W.
Walzel G.
Widl E.
Wulz C.E.
Mossolov V.
Shumeiko N.
Suarez Gonzalez J.
Bansal S.
Benucci L.
De Wolf E.A.
Janssen X.
Luyckx S.
Maes T.
Mucibello L.
Ochesanu S.
Roland B.
Rougny R.
Selvaggi M.
Van Haevermaet H.
Van Mechelen P.
Van Remortel N.
Blekman F.
Blyweert S.
D'Hondt J.
Gonzalez Suarez R.
Kalogeropoulos A.
Maes M.
Olbrechts A.
Van Doninck W.
Van Mulders P.
Van Onsem G.P.
Villella I.
Charaf O.
Clerbaux B.
De Lentdecker G.
Dero V.
Gay A.P.R.
Hammad G.H.
Hreus T.
Marage P.E.
Raval A.
Thomas L.
Vander Marcken G.
Vander Velde C.
Vanlaer P.
Adler V.
Cimmino A.
Costantini S.
Grunewald M.
Klein B.
Lellouch J.
Marinov A.
McCartin J.
Ryckbosch D.
Thyssen F.
Tytgat M.
Vanelderen L.
Verwilligen P.
Walsh S.
Zaganidis N.
Basegmez S.
Bruno G.
Caudron J.
Ceard L.
Cortina Gil E.
De Favereau De Jeneret J.
Delaere C.
Favart D.
Giammanco A.
Publisher(s)
American Physical Society
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 1.14fb -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 475GeV/c 2 is excluded at the 95% confidence level. © 2011 CERN.
Volume
107
Issue
27
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Scopus EID
2-s2.0-84855337715
Source
Physical Review Letters
ISSN of the container
10797114
Sponsor(s)
Science and Technology Facilities Council GRIDPP, ST/F006748/1, ST/F007094/1, ST/G502347/1, ST/H00081X/2, ST/I000410/1, ST/I002200/1, ST/I005912/1, ST/I505572/1 STFC
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung 123501, 138111 SNF
Sources of information:
Directorio de Producción Científica
Scopus