Manchester Particle Physics Seminars, Colloquia and Meetings

Lucia Grillo - Real-time physics at the LHCb experiment

Friday, 1 December 2017 from to (Europe/London)
at Schuster ( 54-6-6.40 - Niels Bohr Common Room )
Description
The LHCb detector is a single-arm forward spectrometer designed for the efficient reconstruction decays of c- and b-hadrons. LHCb has introduced a novel real-time detector alignment and calibration strategy for LHC Run II. Data collected at the start of the fill are processed in a few minutes and used to update the alignment, while the calibration constants are evaluated for each run. In addition, the larger timing budget available allows to process the events using the best performing reconstruction in the trigger, which fully includes the particle identification selection criteria. Thanks to this approach, the reconstruction quality that previously was achieved after the offline processing, in Run-II is achieved at the software trigger level, and a great increase of the selection efficiency of charm and strange hadron decays is obtained. Strategy and performance of this novel approach, are discussed, followed by the presentation of the recent developments implemented for the 2017 run of data taking, and performance achieved by the LHCb experiment in LHC Run-II. These are key ingredients for the ever wider LHCb physics programme, and first steps towards the software developments for the upgrade era.