CP3 Lunch - Single top: the first measurement at LHC - Dr. Andrea Giammanco

Wednesday 23 Feb 2011, 13:00 → 14:00 Europe/Brussels

E/3rd floor-E.349 - Seminar room (E.349) (Marc de Hemptinne (chemin du Cyclotron, 2, Louvain-la-Neuve))

The Standard Model predicts the production of single top quark through three electroweak mechanisms at LHC. In 7 TeV proton-proton collisions the t-channel mode is by far the most abundant of the three mechanisms and it is the one with the most striking final state topology. The single top production through t-channel has been studied by CMS and its cross section has been measured with a dataset of 36.1 /pb through two complementary analyses. Using a data driven method, we exploit two angular distributions for separating signal from background processes. In a multivariate analysis approach, we probe the compatibility of the signal event candidates with the expected characteristics from the Standard Model. We also extract a limit on |Vtb|, under a few simplifying assumptions.

Slides cp3lunch23feb2011.pdf