Publication
Title
Search for same-sign top-quark pair production at $\sqrt{s}$ = 7 TeV and limits on flavour changing neutral currents in the top sector
Author
Institution/Organisation
CMS Collaboration
Abstract
 An inclusive search for same-sign top-quark pair production in pp collisions at s=7 TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 pb−1. This analysis is motivated by recent studies of pptt reporting mass-dependent forward-backward asymmetries larger than expected from the standard model. These asymmetries could be due to Flavor Changing Neutral Currents (FCNC) in the top sector induced by t-channel exchange of a massive neutral vector boson (Z′). Models with such a Z′ also predict enhancement of same-sign top-pair production in pp or pp collisions. Limits are set as a function of the Z′ mass and its couplings to u and t quarks. These limits disfavour the FCNC interpretation of the Tevatron results.
Language
English
Source (journal)
Journal of high energy physics. - Bristol
Publication
Bristol : 2011
ISSN
1126-6708
1029-8479 [online]
Volume/pages
8(2011), p. 1-27
Article Reference
005
ISI
000294901400077
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address