26-30 April 2009
Palacio de Congresos de Madrid
Europe/Zurich timezone

Top Production Cross Sections at D0

28 Apr 2009, 12:05
20m
Room "SALA 9" (Palacio de Congresos de Madrid)

Room "SALA 9"

Palacio de Congresos de Madrid

Paseo de la Castellana, 99 28046 Madrid España

Speaker

Jiri Kvita (Faculty of Mathematics and Physics, Charles University)

Description

We report on measurements of the ttbar production cross section at a center-of-mass energy of 1.96 TeV at the D0 experiment during Run II of the Fermilab Tevatron collider. We use candidate events in lepton+jets and dilepton final states. In the most sensitive channel (lepton+jets channel), a neural network algorithm that uses lifetime information to identify b-quark jets is used to distinguish signal from background processes. We also present measurements of single top quark production at D0 using several multivariate techniques to separate signal from background: boosted decision trees, bayesian neural networks and matrix elements.

Primary author

Jiri Kvita (Faculty of Mathematics and Physics, Charles University)

Presentation Materials