Search for same-sign top-quark pair production at root s=7 TeV and limits on flavour changing neutral currents in the top sector
Abstract
An inclusive search for same-sign top-quark pair production in pp collisions at root 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 p (p) over bar -> t (t) over bar 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.
Autore Pugliese
Tutti gli autori
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POMPILI A.;MARANGELLI B.;CALABRIA C.;SELVAGGI G.;LUSITO L.;BARBONE L.;ABBRESCIA M.;DE PALMA M.;PACIFICO N.;MY S.;NUZZO S.V.
Titolo volume/Rivista
Non Disponibile
Anno di pubblicazione
2011
ISSN
1029-8479
ISBN
Non Disponibile
Numero di citazioni Wos
31
Ultimo Aggiornamento Citazioni
Non Disponibile
Numero di citazioni Scopus
33
Ultimo Aggiornamento Citazioni
Non Disponibile
Settori ERC
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Codici ASJC
Non Disponibile
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