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EnglishThis 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 pp 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.
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| Data di pubblicazione: | 2013 | |
| Titolo: | The LHCb trigger and its performance in 2011 | |
| Autori: | R. Aaij;J. Albrecht;F. Alessio;S. Amato;E. Aslanides;I. Belyaev;M. v. Beuzekom;E. Bonaccorsi;R. Bonnefoy;L. Brarda;O. Callot;M. Cattaneo;H. Chanal;M. Chebbi;X. C. Vidal;M. Clemencic;J. Closier;V. Coco;J. Cogan;O. Deschamps;H. Dijkstra;C. Drancourt;R. Dzhelyadin;M. Frank;M. Gandelman;C. Gaspar;V. V. Gligorov;C. Goebel;L. A. Granado;Y. Guz;C. Haen;J. He;E. v. Herwijnen;W. Hulsbergen;R. Jacobsson;B. Jost;T. M. Karbach;U. Kerzel;P. Koppenburg;G. Krocker;C. Langenbruch;I. Lax;R. L. Gac;R. Lefevre;J. Lefranccois;O. Leroy;L. L. Gioi;G. Liu;F. Machefert;I. V. Machikhiliyan;M. Magne;G. Mancinelli;U. Marconi;A. M. Sanchez;M. .. N.;S. Monteil;N. Neufeld;V. Niess;S. Oggero;A. P. Yzquierdo;P. Perret;M. Perrin-Terrin;B. Pietrzyk;A. P. Navarro;G. Raven;P. Robbe;H. Ruiz;M. .. H.;R. Schwemmer;J. Serrano;I. Shapoval;T. Skwarnicki;B. S. De;P. Spradlin;S. Stahl;V. K. Subbiah;S. T'Jampens;F. Teubert;C. Thomas;M. Vesterinen;M. Williams;M. Witek;A. Zvyaginm | |
| Rivista: | JOURNAL OF INSTRUMENTATION | |
| 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 pp 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. | |
| Digital Object Identifier (DOI): | 10.1088/1748-0221/8/04/P04022 | |
| Handle: | http://hdl.handle.net/11392/2288826 | |
| Appare nelle tipologie: | 03.1 Articolo su rivista |
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