Bibcode
Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; Knünz, V.; König, A.; Krammer, M.; Krätschmer, I.; Liko, D.; Matsushita, T.; Mikulec, I.; Rabady, D.; Rahbaran, B.; Rohringer, H.; Schieck, J.; Schöfbeck, R.; Strauss, J.; Treberer-Treberspurg, W.; Waltenberger, W.; Wulz, C.-E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Alderweireldt, S.; Cornelis, T.; De Wolf, E. A.; Janssen, X.; Knutsson, A.; Lauwers, J.; Luyckx, S.; Van De Klundert, M.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Van Spilbeeck, A.; Abu Zeid, S.; Blekman, F.; D'Hondt, J.; Daci, N.; De Bruyn, I.; Deroover, K.; Heracleous, N.; Keaveney, J.; Lowette, S.; Moreels, L.; Olbrechts, A.; Python, Q.; Strom, D.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Onsem, G. P.; Van Parijs, I.; Barria, P.; Brun, H.; Caillol, C.; Clerbaux, B.; De Lentdecker, G.; Fasanella, G.; Favart, L.; Grebenyuk, A.; Karapostoli, G.; Lenzi, T.; Léonard, A.; Maerschalk, T.; Marinov, A.; Perniè, L.; Randle-conde, A.; Reis, T.; Seva, T.; Vander Velde, C.; Vanlaer, P.; Yonamine, R.; Zenoni, F.; Zhang, F.; Beernaert, K.; Benucci, L.; Cimmino, A.; Crucy, S.; Dobur, D.; Fagot, A.; Garcia, G.; Gul, M.; Mccartin, J.; Ocampo Rios, A. A.; Poyraz, D. et al.
Referencia bibliográfica
Journal of Instrumentation, Volume 12, Issue 01, pp. P01020 (2017).
Fecha de publicación:
1
2017
Número de citas
1000
Número de citas referidas
636
Descripción
This paper describes the CMS trigger system and its performance during
Run 1 of the LHC. The trigger system consists of two levels designed to
select events of potential physics interest from a GHz (MHz) interaction
rate of proton-proton (heavy ion) collisions. The first level of the
trigger is implemented in hardware, and selects events containing
detector signals consistent with an electron, photon, muon, τ
lepton, jet, or missing transverse energy. A programmable menu of up to
128 object-based algorithms is used to select events for subsequent
processing. The trigger thresholds are adjusted to the LHC instantaneous
luminosity during data taking in order to restrict the output rate to
100 kHz, the upper limit imposed by the CMS readout electronics. The
second level, implemented in software, further refines the purity of the
output stream, selecting an average rate of 400 Hz for offline event
storage. The objectives, strategy and performance of the trigger system
during the LHC Run 1 are described.