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Search for same-sign top-quark pair production at √ s = 7 TeV and limits on flavour changing neutral currents in the top sector
Name
Chatrchyan2011_Article_SearchForSame-signTop-quarkPai.pdf
Description
Published version
Size
410.42 KB
Format
Adobe PDF
Checksum (MD5)
e720ff1ddec348d42ebeadafa42a9ced
Date Issued
2011
Journal
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Citation
Chatrchyan, S., et al. "Search for Same-Sign Top-Quark Pair Production at Root S=7 Tev and Limits on Flavour Changing Neutral Currents in the Top Sector." Journal of High Energy Physics 8 (2011).
Version
Final published version
Abstract
An inclusive search for same-sign top-quark pair production in pp collisions at √s = 7TeV 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 pp → tt 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. © SISSA 2011.
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
10.1007/JHEP08(2011)005
