25 July 2007 to 1 August 2007
Karlsruhe University
Europe/Zurich timezone

Search for scalar top admixture in the $t\bar{t}\rightarrow\ell+$jets channel with the D0 detector

27 Jul 2007, 17:10
20m
Gaede-Auditorium (Karlsruhe University)

Gaede-Auditorium

Karlsruhe University

Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
Parallel Talk Colliders - Susy Phenomenology Colliders - Susy Phenomenology 4 (Experiment)

Speaker

Su-Jung Park (University of Rochester)

Description

We report on a search for scalar top quark pair production in the lepton+jets channel. Just like Standard Model top quarks, scalar top quarks are produced in pairs in proton-antiproton collisions. One of the preferred scenarios is for the scalar top to decay to a b-quark and a chargino, with the chargino subsequently decaying into a real or virtual W boson and a neutralino. The neutralino escapes without being detected. Thus, the final state signature can be a lepton, two b-jets, two light quark jets and missing transverse energy, which is identical to the signature of Standard Model $t\bar{t}$ production. We use the kinematic differences between the exotic and the Standard Model scenarios to separate the two.

Author

Su-Jung Park (University of Rochester)

Co-author

D0 Collaboration

Presentation materials