Compact Muon Solenoid
View article: Particle-flow reconstruction and global event description with the CMS detector
Particle-flow reconstruction and global event description with the CMS detector Open
The CMS apparatus was identified, a few years before the start of the LHC operation at CERN, to feature properties well suited to particle-flow (PF) reconstruction: a highly-segmented tracker, a fine-grained electromagnetic calorimeter, a …
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The CMS trigger system Open
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 (…
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Development of the CMS detector for the CERN LHC Run 3 Open
Since the initial data taking of the CERN LHC, the CMS experiment has undergone substantial upgrades and improvements. This paper discusses the CMS detector as it is configured for the third data-taking period of the CERN LHC, Run 3, which…
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Technical Proposal for FASER: ForwArd Search ExpeRiment at the LHC Open
FASER is a proposed small and inexpensive experiment designed to search for light, weakly-interacting particles during Run 3 of the LHC from 2021-23. Such particles may be produced in large numbers along the beam collision axis, travel for…
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Observation of Collider Muon Neutrinos with the SND@LHC Experiment Open
We report the direct observation of muon neutrino interactions with the SND@LHC detector at the Large Hadron Collider. A dataset of proton-proton collisions at sqrt[s]=13.6 TeV collected by SND@LHC in 2022 is used, corresponding to an inte…
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Development of the CMS detector for the CERN LHC Run 3 Open
Since the initial data taking of the CERN LHC, the CMS experiment has undergone substantial upgrades and improvements. This paper discusses the CMS detector as it is configured for the third data-taking period of the CERN LHC, Run 3, which…
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On the feasibility of a pulsed 14 TeV c.m.e. muon collider in the LHC tunnel Open
In this paper, we discuss the technical feasibility, key machine parameters and major challenges of a 14 TeV c.m.e. muon-muon collider in the LHC tunnel. The luminosity of the collider is evaluated for three alternative muon sources—the PS…
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Expanding the reach of heavy neutrino searches at the LHC Open
The observation of neutrino oscillations establishes that neutrinos have non-zero mass and provides one of the more compelling arguments for physics beyond the standard model (SM) of particle physics. We present a feasibility study to sear…
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Electroweak and QCD corrections to -boson production with one jet in a massive five-flavor scheme Open
We compute the O(αsα2) and O(α$^{2}_{s}$α) contributions to the production cross section of a Z boson with one b jet at the Large Hadron Collider (LHC) and study their phenomenological relevance for LHC physics. The accurate prediction of …
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Short-Strip ASIC (SSA): A 65nm Silicon-Strip Readout ASIC for the Pixel-Strip (PS) Module of the CMS Outer Tracker Detector Upgrade at HL-LHC Open
The Compact Muon Solenoid (CMS) experiment at CERN is foreseen to receive a substantial upgrade of the outer tracker detector and its front-end readout electronics, requiring higher granularity and readout bandwidth to handle the large num…
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Measurement of energy flow, cross section and average inelasticity of forward neutrons produced in $$ \sqrt{s} $$ = 13 TeV proton-proton collisions with the LHCf Arm2 detector Open
A bstract In this paper, we report the measurement of the energy flow, the cross section and the average inelasticity of forward neutrons (+ antineutrons) produced in $$ \sqrt{s} $$ = 13 TeV proton-proton collisions. These quantities are o…
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One year of FBG-based thermo-hygrometers in operation in the CMS experiment at CERN Open
In this contribution we present results concerning the very first application of fiber optic sensors (FOSs) for relative humidity (RH) monitoring in high radiations environments. After a few years of investigations at CERN in Geneva, since…
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Response of a CMS HGCAL silicon-pad electromagnetic calorimeter prototype to 20–300 GeV positrons Open
The Compact Muon Solenoid collaboration is designing a new high-granularity endcap calorimeter, HGCAL, to be installed later this decade. As part of this development work, a prototype system was built, with an electromagnetic section consi…
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Triggering on electrons, jets and tau leptons with the CMS upgraded calorimeter trigger for the LHC RUN II Open
The Compact Muon Solenoid (CMS) experiment has implemented a sophisticated two-level online selection system that achieves a rejection factor of nearly 10e5. During Run II, the LHC will increase its centre-of-mass energy up to 13 TeV and p…
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Spark and HPC for High Energy Physics Data Analyses Open
A full High Energy Physics (HEP) data analysis is divided into multiple data reduction phases. Processing within these phases is extremely time consuming, therefore intermediate results are stored in files held in mass storage systems and …
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The potential of a TeV-scale muon-ion collider Open
We propose the development of a novel muon-proton and muon-nucleus collider facility at the TeV scale that is capable of performing precision deep inelastic scattering measurements in new regimes and providing a rich program in nuclear and…
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The CMS Level-1 Calorimeter Trigger for the LHC Run II Open
Results from the completed Phase 1 Upgrade of the Compact Muon Solenoid (CMS) Level-1 Calorimeter Trigger are presented. The upgrade was completed in two stages, with the first running in 2015 for proton and Heavy Ion collisions and the fi…
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Improving data quality monitoring via a partnership of technologies and resources between the CMS experiment atCERN and industry Open
The Compact Muon Solenoid (CMS) experiment dedicates significant effort to assess the quality of its data, online and offline. A real-time data quality monitoring system is in place to spot and diagnose problems as promptly as possible to …
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Test Results of the CERN HL-LHC Low- Quadrupole Short Models MQXFS3c and MQXFS4 Open
For the High Luminosity Upgrade of the CERN Large Hadron Collider, lower * quadrupole magnets based on advanced Nb3Sn conductors will be installed on each side of the ATLAS and CMS experiment insertion zones. As part of the technological d…
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Track clustering with a quantum annealer for primary vertex reconstruction at hadron colliders Open
Clustering of charged particle tracks along the beam axis is the first step in reconstructing the positions of hadronic interactions, also known as primary vertices, at hadron collider experiments. We use a 2036 physical qubit D-Wave quant…
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Readout architecture for the Pixel-Strip module of the CMS Outer Tracker Phase-2 upgrade Open
The Outer Tracker upgrade of the Compact Muon Solenoid (CMS) experiment at CERN introduces new challenges for the front-end readout electronics. In particular, the capability of identifying particles with high transverse momentum using mod…
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What Data Get to Travel in High Energy Physics? The Construction of Data at the Large Hadron Collider Open
In present-day high-energy physics experiments, experimenters need to make various judgments in order to design automated data processing systems within the existing technical limitations. In this chapter, as a case study, I consider the a…
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The CMS Particle Flow Algorithm Open
The event reconstruction at the Compact Muon Solenoid (CMS) experiment at the CERN Large Hadron Collider (LHC) is predominantly based on the Particle Flow algorithm. This algorithm for a global event description uses the information from a…
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Upgrade of the CMS resistive plate chambers for the high luminosity LHC Open
During the upcoming High Luminosity phase of the Large Hadron Collider (HL-LHC), the integrated luminosity of the accelerator will increase to 3000 fb −1 . The expected experimental conditions in that period in terms of background rates, e…
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Resonant single leptoquark production at hadron colliders Open
A novel strategy to search for leptoquark (LQ) production at the Large Hadron Collider (LHC) is proposed. Our method relies on the observation that the probability to find a charged lepton with a given momentum fraction in the proton ($p$)…
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Research and development of particle detectors for muon tomography and the CERN ALICE experiment Open
The Standard Model of particle physics describes successfully the building blocks of the material and their interactions, which are confirmed by most of the experimental observations. However, there are several open questions, e. g. how th…
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Flavor-changing decay h → τ μ at super hadron colliders Open
A bstract We study the flavor-changing decay h → τ μ with τ = τ − + τ + and μ = μ − + μ + of a Higgs boson at future hadron colliders, namely: a) High Luminosity Large Hadron Collider, b) High Energy Large Hadron Collider and c) Future had…
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Spatio-Temporal Anomaly Detection with Graph Networks for Data Quality Monitoring of the Hadron Calorimeter Open
The Compact Muon Solenoid (CMS) experiment is a general-purpose detector for high-energy collision at the Large Hadron Collider (LHC) at CERN. It employs an online data quality monitoring (DQM) system to promptly spot and diagnose particle…
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Next-to-leading BFKL evolution for dijets with large rapidity separation at different LHC energies Open
The calculations based on the next-to-leading logarithm (NLL) approximation for the Balitsky-Fadin-Kuraev-Lipatov (BKFL) evolution are presented for the Mueller-Navelet (MN) dijet production cross section, as well as for their ratios at di…
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Study of interpad-gap of HPK 3.1 production LGADs with Transient Current Technique Open
The Phase-2 upgrade of the Large Hadron Collider (LHC) to High-Luminosity LHC (HL-LHC) allows an increase in the operational luminosity value by a factor of 5–7 that will result in delivering 3000 fb$^{-1}$ or more integrated luminosity. D…