20-27 July 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

The ATLAS b-jet Trigger

Not scheduled
Dauphine (Alpes Congrès - Alpexpo)

Dauphine

Alpes Congrès - Alpexpo

Poster Detector R & D and data handling

Speaker

Danilo Enoque Ferreira de Lima (University of Glasgow)

Description

The online event selection is crucial to reject most of the events containing uninteresting background collisions while preserving as much as possible the interesting physical signals. The b-jet selection is part of the trigger strategy of the ATLAS experiment and a set of dedicated triggers is presently contributing to the event selection for the 2011 running. The b-jets acceptance is increased and the background reduced by lowering jet transverse energy thresholds at the first trigger level and applying b-tagging techniques at the subsequent levels. Different physics channels, especially topologies containing more than one b-jet where higher rejection factors are achieved, benefit from requesting this trigger to be fired. An overview of the status-of-art of the b-jet trigger menu and performance on real data is presented in this contribution.

Primary authors

Dr Andrea Coccaro (Universita' di Genova/INFN) Danilo Enoque Ferreira de Lima (University of Glasgow)

Presentation Materials