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Title: The CMS trigger system

Journal Article · · Journal of Instrumentation

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, tau 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.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
CMS
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1329706
Report Number(s):
FERMILAB-PUB-16-377-CMS; CMS-TRG-12-001; CERN-EP-2016-160; arXiv:1609.02366; 1485699
Journal Information:
Journal of Instrumentation, Vol. 12; ISSN 1748-0221
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 518 works
Citation information provided by
Web of Science

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Search for the production of W±W±W events at s =13 TeV text January 2019
Search for vectorlike leptons in multilepton final states in proton-proton collisions at s =13 TeV text January 2019
Strange hadron production in pp and pPb collisions at sNN =5.02 TeV text January 2020
Search for supersymmetry in multijet events with missing transverse momentum in proton-proton collisions at 13 TeV text January 2017
Search for Narrow Resonances in the b-Tagged Dijet Mass Spectrum in Proton-Proton Collisions at √s 8 TeV text January 2018
Search for pair production of second-generation leptoquarks at √s = 13 TeV text January 2019
Azimuthal separation in nearly back-to-back jet topologies in inclusive 2- and 3-jet events in ${\text {p}} {\text {p}} $ collisions at $\sqrt{s}=13\,\text {Te}\text {V} $ text January 2019
Measurement of the top quark polarization and t¯t spin correlations using dilepton final states in proton-proton collisions at √s=13 TeV text January 2019
Search for pair production of vectorlike quarks in the fully hadronic final state text January 2019
Search for production of four top quarks in final states with same-sign or multiple leptons in proton–proton collisions at $\sqrt{s}=13$$\,\text {TeV}$ text January 2020
Measurement of the Jet Mass Distribution and Top Quark Mass in Hadronic Decays of Boosted Top Quarks in pp Collisions at √s = 13 TeV text January 2020
Multiparticle correlation studies in p Pb collisions at s N N = 8.16 TeV journal January 2020
Strange hadron production in pp and p Pb collisions at s N N = 5.02 TeV journal June 2020
Measurement of the top quark Yukawa coupling from t t ¯ kinematic distributions in the lepton + jets final state in proton-proton collisions at s = 13     TeV journal October 2019
Measurement of associated production of a $$\mathrm {W}$$ W boson and a charm quark in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\text {V} $$ s = 13 Te journal March 2019
Evidence for $$\text {W}\text {W}$$WW production from double-parton interactions in proton–proton collisions at $$\sqrt{s} = 13 \,\text {TeV} $$s=13TeV journal January 2020
Measurement of the energy density as a function of pseudorapidity in proton-proton collisions at $\sqrt{s} =$ 13 TeV text January 2018
Search for pair production of vectorlike quarks in the fully hadronic final state text January 2019
Search for Supersymmetry with a Compressed Mass Spectrum in Events with a Soft $\tau$ Lepton, a Highly Energetic Jet, and Large Missing Transverse Momentum in Proton-Proton Collisions at $\sqrt{s}=$ TeV text January 2019
Search for resonant production of second-generation sleptons with same-sign dimuon events in proton-proton collisions at √s=13TeV text January 2018
Measurement of prompt and nonprompt charmonium suppression in $\text {PbPb}$ collisions at 5.02 $\,\text {Te}\text {V}$ text January 2017
Particle-flow reconstruction and global event description with the CMS detector text January 2017
Observation of Higgs boson decay to bottom quarks text January 2018
Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton+jets final state in pp collisions at $\sqrt{s} =$ 13 TeV text January 2018
Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks text January 2018
Search for Physics Beyond the Standard Model in Events with High-Momentum Higgs Bosons and Missing Transverse Momentum in Proton-Proton Collisions at 13 TeV text January 2018
Search for W Boson Decays to Three Charged Pions text January 2019
Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at √s = 13 TeV text January 2020
Identification of heavy, energetic, hadronically decaying particles using machine-learning techniques text January 2020
Search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks in proton-proton collisions at $\sqrt{s}=13\,\text {Te}\text {V}$ text January 2019
Azimuthal correlations for inclusive 2-jet, 3-jet, and 4-jet events in pp collisions at $$\sqrt{s}= 13~\hbox {TeV}$$s=13TeV text January 2018
Electroweak production of two jets in association with a Z boson in proton–proton collisions at $\sqrt{s}= $ 13$\,\text {TeV}$ text January 2018
Angular analysis of the decay B + K + μ + μ in proton-proton collisions at s = 8 TeV journal December 2018
Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at $$\sqrt{s} = 13\,\text {TeV} $$ s = 13 TeV journal March 2019
Electroweak production of two jets in association with a Z boson in proton-proton collisions at $\sqrt{s}= $ 13 $\,\text {TeV} text January 2017
Measurement of differential cross sections for inclusive isolated-photon and photon+jets production in proton-proton collisions at $\sqrt{s} =$ 13 TeV text January 2019
Search for resonant production of second-generation sleptons with same-sign dimuon events in proton-proton collisions at √s=13TeV text January 2019
Search for Supersymmetry with a Compressed Mass Spectrum in Events with a Soft $\tau$ Lepton, a Highly Energetic Jet, and Large Missing Transverse Momentum in Proton-Proton Collisions at $\sqrt{s}=$ TeV text January 2020
Particle-flow reconstruction and global event description with the CMS detector text January 2017
Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at $\sqrt{s} =$ 13 TeV text January 2020
Observation of Higgs Boson Decay to Bottom Quarks text January 2018
Search for Physics Beyond the Standard Model in Events with High-Momentum Higgs Bosons and Missing Transverse Momentum in Proton-Proton Collisions at 13 TeV text January 2018
Search for a heavy pseudoscalar boson decaying to a Z and a Higgs boson at $\sqrt{s}=13\,\text {Te}\text {V} $ text January 2019
Calibration of the CMS hadron calorimeters using proton-proton collision data at √s = 13 TeV text January 2020
Observation of Top Quark Production in Proton-Nucleus Collisions text January 2017
Measurement of prompt and nonprompt charmonium suppression in $$\text {PbPb}$$ PbPb collisions at 5.02 $$\,\text {Te}\text {V}$$ TeV journal June 2018
Search for associated production of a Higgs boson and a single top quark in proton-proton collisions at $\sqrt{s} =$  TeV text January 2019
Constraints on anomalous $HVV$ couplings from the production of Higgs bosons decaying to $\tau$ lepton pairs text January 2019
Search for W boson decays to three charged pions text January 2019
Measurement of the energy density as a function of pseudorapidity in proton-proton collisions at $\sqrt{s} =$ 13 TeV text January 2019
Measurement of differential cross sections and charge ratios for $t$-channel single top quark production in proton-proton collisions at $\sqrt{s}=$ 13 TeV text January 2019
Observation of top quark production in proton-nucleus collisions text January 2017
Search for physics beyond the standard model in events with high-momentum Higgs bosons and missing transverse momentum in proton-proton collisions at 13 TeV text January 2017
Search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks in proton-proton collisions at $\sqrt{s} =$ 13 TeV text January 2018
Search for resonant production of second-generation sleptons with same-sign dimuon events in proton-proton collisions at $\sqrt{s} =$ 13 TeV text January 2018
Search for physics beyond the standard model in events with overlapping photons and jets text January 2019
Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at $\sqrt{s} =$ 13 TeV text January 2019
Particle-flow reconstruction and global event description with the CMS detector text January 2017
Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks text January 2018
Measurement of the $\mathrm {Z}/\gamma ^{*} \rightarrow \tau \tau $ cross section in pp collisions at $\sqrt{s} = 13 \hbox { TeV}$=13TeV and validation of $\tau $ lepton analysis techniques text January 2018
Search for supersymmetry in multijet events with missing transverse momentum in proton-proton collisions at 13 TeV text January 2017

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