HAL : in2p3-00279693, version 1
 arXiv : 0805.2109
 Search for the Flavor Changing Neutral Current Decay t $\to Zq$ in $p \bar{p}$ Collisions at $\sqrt{s}=1.96$
 CDF Collaboration(s)
 (2008)
 We report a search for the flavor changing neutral current (FCNC) decay of the top quark \tZq ($q=u,c$) in \ppbar collisions at $\sqrt{s} = 1.96\tev$ using a data sample corresponding to an integrated luminosity of 1.9\invfb collected by the CDF II detector. This decay is strongly suppressed in the standard model (SM) and a signal at the Tevatron would be an indication of physics beyond the SM. Using $Z+\ge4$ jet final state candidate events, both with and without an identified bottom quark jet, we discriminate signal from background by exploring kinematic constraints present in FCNC events and obtain an upper limit of $\btZq < 3.7%$ at 95% C.L.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Lien vers le texte intégral : http://fr.arXiv.org/abs/0805.2109
 in2p3-00279693, version 1 http://hal.in2p3.fr/in2p3-00279693 oai:hal.in2p3.fr:in2p3-00279693 Contributeur : Swarna Bassava <> Soumis le : Mardi 27 Mai 2008, 13:49:32 Dernière modification le : Mardi 27 Mai 2008, 13:54:17