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The LHCb trigger in Run II

The LHCb trigger system has been upgraded to allow alignment, calibration and physics analysis to be performed in real time. An increased CPU capacity and improvements in the software have allowed lifetime unbiased selections of beauty and charm decays in the high level trigger. Thanks to offline qu...

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Detalles Bibliográficos
Autor principal: Michielin, Emanuele
Lenguaje:eng
Publicado: SISSA 2016
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.282.0996
http://cds.cern.ch/record/2287601
Descripción
Sumario:The LHCb trigger system has been upgraded to allow alignment, calibration and physics analysis to be performed in real time. An increased CPU capacity and improvements in the software have allowed lifetime unbiased selections of beauty and charm decays in the high level trigger. Thanks to offline quality event reconstruction already available online, physics analyses can be performed directly on this information and for the majority of charm physics selections a reduced event format can be written out. Beauty hadron decays are more efficiently triggered by re-optimised inclusive selections, and the HLT2 output event rate is increased by a factor of three.