The LHCb Trigger and its Performance in 2011
Abstract
This paper presents the design of the LHCb trigger and its performance on data taken at the LHC in 2011. A principal goal of LHCb is to perform flavour physics measurements, and the trigger is designed to distinguish charm and beauty decays from the light quark background. Using a combination of lepton identification and measurements of the particles' transverse momenta the trigger selects particles originating from charm and beauty hadrons, which typically fly a finite distance before decaying. The trigger reduces the roughly 11\,MHz of bunch-bunch crossings that contain at least one inelastic interaction to 3\,kHz. This reduction takes place in two stages; the first stage is implemented in hardware and the second stage is a software application that runs on a large computer farm. A data-driven method is used to evaluate the performance of the trigger on several charm and beauty decay modes.
Keywords
Cite
@article{arxiv.1211.3055,
title = {The LHCb Trigger and its Performance in 2011},
author = {R. Aaij and J. Albrecht and F. Alessio and S. Amato and E. Aslanides and I. Belyaev and M. vanBeuzekom and E. Bonaccorsi and R. Bonnefoy and L. Brarda and O. Callot and M. Cattaneo and H. Chanal and M. Chebbi and X. CidVidal and M. Clemencic and J. Closier and V. Coco and J. Cogan and O. Deschamps and H. Dijkstra and C. Drancourt and R. Dzhelyadin and M. Frank and M. Gandelman and C. Gaspar and V. V. Gligorov and C. Göbel and L. A. GranadoCardoso and Yu. Guz and C. Haen and J. He and E. vanHerwijnen and W. Hulsbergen and R. Jacobsson and B. Jost and T. M. Karbach and U. Kerzel and P. Koppenburg and G. Krocker and C. Langenbruch and I. Lax and R. LeGac and R. Lefèvre and J. Lefrançois and O. Leroy and L. LiGioi and G. Liu and F. Machefert and I. V. Machikhiliyan and M. Magne and G. Mancinelli and U. Marconi and A. MartínSánchez and M. -N. Minard and S. Monteil and N. Neufeld and V. Niess and S. Oggero and A. Pérez-CaleroYzquierdo and P. Perret and M. Perrin-Terrin and B. Pietrzyk and A. PuigNavarro and G. Raven and P. Robbe and H. Ruiz and M. -H. Schune and R. Schwemmer and J. Serrano and I. Shapoval and T. Skwarnicki and B. SouzaDePaula and P. Spradlin and S. Stahl and V. K. Subbiah and S. T'Jampens and F. Teubert and C. Thomas and M. Vesterinen and M. Williams and M. Witek and A. Zvyagin},
journal= {arXiv preprint arXiv:1211.3055},
year = {2015}
}