# Search for same-sign top-quark pair production at p s = 7 TeV and limits on flavour changing neutral currets in the top sector - Zurich Open Repository and Archive

CMS Collaboration; Amsler, C; Chiochia, V; Snoek, H; Favaro, C; Verzetti, M; Storey, J; De Visscher, S; Schmitt, A; Aguiló, E; Millan, B; Ivova, M; Otyugova, P (2011). Search for same-sign top-quark pair production at p s = 7 TeV and limits on flavour changing neutral currets in the top sector. Journal of High Energy Physics, (8):5.

## Abstract

An inclusive search for same-sign top-quark pair production in pp collisions at sqrt(s) = 7 TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 inverse picobarns. This analysis is motivated by recent studies of p p-bar to t t-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 p p-bar 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.

## Abstract

An inclusive search for same-sign top-quark pair production in pp collisions at sqrt(s) = 7 TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 inverse picobarns. This analysis is motivated by recent studies of p p-bar to t t-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 p p-bar 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.

## Citations

31 citations in Web of Science®
30 citations in Scopus®

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Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics English 2011 14 Feb 2012 20:33 26 Jan 2017 08:51 Springer 1126-6708 (P) 1029-8479 (E) The original publication is available at www.springerlink.com https://doi.org/10.1007/JHEP08(2011)005 http://arxiv.org/abs/1106.2142

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