Search for flavor changing neutral currents in top quark decays in pp collisions at 7 TeV

S. Chatrchyan; M. Besancon; S. Choudhury; M. Dejardin; D. Denegri; B. Fabbro; J.L. Faure; F. Ferri; S. Ganjour; A. Givernaud; P. Gras; G. Hamel de Monchenault; P. Jarry; E. Locci; J. Malcles; L. Millischer; A. Nayak; J. Rander; A. Rosowsky; I. Shreyber; M. Titov; S. Baffioni; F. Beaudette; L. Benhabib; L. Bianchini; M. Bluj; C. Broutin; P. Busson; C. Charlot; N. Daci; T. Dahms; L. Dobrzynski; R. Granier de Cassagnac; M. Haguenauer; P. Mine; C. Mironov; M. Nguyen; C. Ochando; P. Paganini; D. Sabes; R. Salerno; Y. Sirois; C. Veelken; A. Zabi; J.-L. Agram; J. Andrea; D. Bloch; D. Bodin; J.-M. Brom; M. Cardaci; E.C. Chabert; C. Collard; E. Conte; F. Drouhin; C. Ferro; J.-C. Fontaine; D. Gele; U. Goerlach; P. Juillot; A.-C. Lebihan; P. Van Hove; F. Fassi; D. Mercier; S. Beauceron; N. Beaupere; O. Bondu; G. Boudoul; J. Chasserat; R. Chierici; D. Contardo; P. Depasse; H. El Mamouni; J. Fay; S. Gascon; M. Gouzevitch; B. Ille; T. Kurca; M. Lethuillier; L. Mirabito; S. Perries; V. Sordini; S. Tosi; Y. Tschudi; P. Verdier; S. Viret

HAL: in2p3-00723063, version 1

arXiv: 1208.0957

DOI: 10.1016/j.physletb.2012.12.045

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Physics Letters B 718 (2013) 1252-1272

Search for flavor changing neutral currents in top quark decays in pp collisions at 7 TeV

S. Chatrchyan, M. Besancon¹, S. Choudhury¹, M. Dejardin¹, D. Denegri¹, B. Fabbro¹, J.L. Faure¹, F. Ferri¹, S. Ganjour¹, A. Givernaud¹, P. Gras¹, G. Hamel de Monchenault¹, P. Jarry¹, E. Locci¹, J. Malcles¹, L. Millischer¹, A. Nayak¹, J. Rander¹, A. Rosowsky¹, I. Shreyber¹, M. Titov¹, S. Baffioni², F. Beaudette², L. Benhabib², L. Bianchini², M. Bluj², C. Broutin², P. Busson², C. Charlot², N. Daci², T. Dahms², L. Dobrzynski², R. Granier de Cassagnac², M. Haguenauer², P. Mine², C. Mironov², M. Nguyen², C. Ochando², P. Paganini², D. Sabes², R. Salerno², Y. Sirois², C. Veelken², A. Zabi², J.-L. Agram³, J. Andrea³, D. Bloch³, D. Bodin³, J.-M. Brom³, M. Cardaci³, E.C. Chabert³, C. Collard³, E. Conte³, F. Drouhin³, C. Ferro³, J.-C. Fontaine³, D. Gele³, U. Goerlach³, P. Juillot³, A.-C. Lebihan³, P. Van Hove³, F. Fassi⁴, D. Mercier⁴, S. Beauceron⁵, N. Beaupere⁵, O. Bondu⁵, G. Boudoul⁵, J. Chasserat⁵, R. Chierici⁵, D. Contardo⁵, P. Depasse⁵, H. El Mamouni⁵, J. Fay⁵, S. Gascon⁵, M. Gouzevitch⁵, B. Ille⁵, T. Kurca⁵, M. Lethuillier⁵, L. Mirabito⁵, S. Perries⁵, V. Sordini⁵, S. Tosi⁵, Y. Tschudi⁵, P. Verdier⁵, S. Viret⁵

For the CMS collaboration(s)

(2013)

The results of a search for flavor changing neutral currents in top quark decays t to Zq in events with a topology compatible with the decay chain t t-bar to Wb+Zq to ell nu b + ell ell q are presented. The search is performed with a data sample corresponding to an integrated luminosity of 5.0 inverse femtobarns of proton-proton collisions at a center-of-mass energy of 7 TeV, collected with the CMS detector at the LHC. The observed number of events agrees with the standard model prediction and no evidence for flavor changing neutral currents in top quark decays is found. A t to Zq branching fraction greater than 0.24% is excluded at the 95% confidence level.

1:	IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)

2:	LLR - Laboratoire Leprince-Ringuet

3:	IPHC - Institut Pluridisciplinaire Hubert Curien

4:	CC IN2P3 - Centre de Calcul de l'inst. national de phy. nucléaire et de phy. des particules

5:	IPNL - Institut de Physique Nucléaire de Lyon

Subject(s)

Physics/High Energy Physics - Experiment

Fulltext link:

http://fr.arXiv.org/abs/1208.0957


in2p3-00723063, version 1
http://hal.in2p3.fr/in2p3-00723063
oai:hal.in2p3.fr:in2p3-00723063
From: Sylvie Florès <>
Submitted on: Tuesday, 7 August 2012 13:13:08
Updated on: Thursday, 7 March 2013 07:50:04