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1.

001-es BibID:BIBFORM129654
035-os BibID:(Scopus)105003553922
Első szerző:CMS Collaboration
Cím:Proton reconstruction with the TOTEM Roman pot detectors for high-[beta]* LHC data / The CMS collaboration and the TOTEM collaboration
Dátum:2025
ISSN:1748-0221
Megjegyzések:The TOTEM Roman pot detectors are used to reconstruct the transverse momentum of scattered protons and to estimate the transverse location of the primary interaction. This paper presents new methods of track reconstruction, measurements of strip-level detection efficiencies, cross-checks of the LHC beam optics, and detector alignment techniques, along with their application in the selection of signal collision events. The track reconstruction is performed by exploiting hit cluster information through a novel method using a common polygonal area in the intercept-slope plane. The technique is applied in the relative alignment of detector layers with ?m precision. A tag-and-probe method is used to extract strip-level detection efficiencies. The alignment of the Roman pot system is performed through time-dependent adjustments, resulting in a position accuracy of 3 ?m in the horizontal and 60 ?m in the vertical directions. The goal is to provide an optimal reconstruction tool for central exclusive physics analyses based on the high-[beta]* data-taking period at root{s} = 13 TeV in 2018.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Performance of High Energy Physics Detectors
PATTERN RECOGNITION
CLUSTER FINDING
CALIBRATION AND FITTING METHODS
Megjelenés:Journal of Instrumentation. - 20 : 04 (2025), p. 1-54. -
További szerzők:Oláh László (1967-) (fizikus) Ujvári Balázs (1977-) (fizikus) TOTEM Collaboration
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2.

001-es BibID:BIBFORM126821
035-os BibID:(WOS)001381771700002 (Scopus)85204338745
Első szerző:CMS Collaboration
Cím:Performance of the CMS electromagnetic calorimeter in pp collisions at root{s} = 13 TeV / CMS Collaboration
Dátum:2024
ISSN:1748-0221
Megjegyzések:The operation and performance of the Compact Muon Solenoid (CMS) electromagnetic calorimeter (ECAL) are presented, based on data collected in pp collisions at root s = 13 TeV at the CERN LHC, in the years from 2015 to 2018 (LHC Run 2), corresponding to an integrated luminosity of 151 fb(-1). The CMS ECAL is a scintillating lead-tungstate crystal calorimeter, with a silicon strip preshower detector in the forward region that provides precise measurements of the energy and the time-of-arrival of electrons and photons. The successful operation of the ECAL is crucial for a broad range of physics goals, ranging from observing the Higgs boson and measuring its properties, to other standard model measurements and searches for new phenomena. Precise calibration, alignment, and monitoring of the ECAL response are important ingredients to achieve these goals. To face the challenges posed by the higher luminosity, which characterized the operation of the LHC in Run 2, the procedures established during the 2011-2012 run of the LHC have been revisited and new methods have been developed for the energy measurement and for the ECAL calibration. The energy resolution of the calorimeter, for electrons from Z boson decays reaching the ECAL without significant loss of energy by bremsstrahlung, was better than 1.8%, 3.0%, and 4.5% in the vertical bar eta vertical bar intervals [ 0.0, 0.8], [0.8, 1.5], [1.5, 2.5], respectively. This resulting performance is similar to that achieved during Run 1 in 2011-2012, in spite of the more severe running conditions.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Gamma detectors (scintillators, CZT, HPGe, HgI etc)
Large detector systems for particle and astroparticle physics
Megjelenés:Journal of Instrumentation. - 19 : 9 (2024), p. 1-64. -
További szerzők:Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus) Zilizi Gyula (1965-) (fizikus)
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3.

001-es BibID:BIBFORM126766
035-os BibID:(WoS)001381771700003 (Scopus)85204600465
Első szerző:CMS Collaboration
Cím:Performance of CMS muon reconstruction from proton-proton to heavy ion collisions / CMS Collaboration
Dátum:2024
ISSN:1748-0221
Megjegyzések:The performance of muon tracking, identification, triggering, momentum resolution, and momentum scale has been studied with the CMS detector at the LHC using data collected at root s(NN) = 5.02 TeV in proton-proton (pp) and lead-lead (PbPb) collisions in 2017 and 2018, respectively, and at root s(NN) = 8.16 TeV in proton-lead (pPb) collisions in 2016. Muon efficiencies, momentum resolutions, and momentum scales are compared by focusing on how the muon reconstruction performance varies from relatively small occupancy pp collisions to the larger occupancies of pPb collisions and, finally, to the highest track multiplicity PbPb collisions. We find the efficiencies of muon tracking, identification, and triggering to be above 90% throughout most of the track multiplicity range. The momentum resolution and scale are unaffected by the detector occupancy. The excellent muon reconstruction of the CMS detector enables precision studies across all available collision systems.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Instrumentation and methods for heavy-ion reactions and fission studies
Large detector systems for particle and astroparticle physics
Muon spectrometers
Megjelenés:Journal of Instrumentation. - 19 : 9 (2024), p. 1-48. -
További szerzők:Bartók Márton (fizikus) Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus) Zilizi Gyula (1965-) (fizikus) Karancsi János (1987-) (fizikus)
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4.

001-es BibID:BIBFORM122652
035-os BibID:(Scopus)85195241083
Első szerző:CMS Collaboration
Cím:Development of the CMS detector for the CERN LHC Run 3 / CMS Collaboration
Dátum:2024
ISSN:1748-0221
Megjegyzések: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 started in 2022. The entire silicon pixel tracking detector was replaced. A new powering system for the superconducting solenoid was installed. The electronics of the hadron calorimeter was upgraded. All the muon electronic systems were upgraded, and new muon detector stations were added, including a gas electron multiplier detector. The precision proton spectrometer was upgraded. The dedicated luminosity detectors and the beam loss monitor were refurbished. Substantial improvements to the trigger, data acquisition, software, and computing systems were also implemented, including a new hybrid CPU/GPU farm for the high-level trigger.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Calorimeters
Large detector systems for particle and astroparticle physics
Particle tracking detectors
Megjelenés:Journal of Instrumentation. - 19 : 05 (2024), p. 1-256. -
További szerzők:Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus) Zilizi Gyula (1965-) (fizikus)
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5.

001-es BibID:BIBFORM121185
035-os BibID:(WoS)001185665800006 (Scopus)85186624167
Első szerző:CMS Collaboration
Cím:Muon identification using multivariate techniques in the CMS experiment in proton-proton collisions at root{s} = 13 TeV / CMS Collaboration
Dátum:2024
ISSN:1748-0221
Megjegyzések:The identification of prompt and isolated muons, as well as muons from heavy -flavour hadron decays, is an important task. We developed two multivariate techniques to provide highly efficient identification for muons with transverse momentum greater than 10 GeV. One provides a continuous variable as an alternative to a cut -based identification selection and offers a better discrimination power against misidentified muons. The other one selects prompt and isolated muons by using isolation requirements to reduce the contamination from nonprompt muons arising in heavy-flavour hadron decays. Both algorithms are developed using 59.7 fb-1 of proton-proton collisions data at a centre-of-mass energy of root s = 13 TeV collected in 2018 with the CMS experiment at the CERN LHC.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Muon spectrometers
Particle identification methods
Particle tracking detectors
Megjelenés:Journal of Instrumentation. - 19 : 02 (2024), p. 1-43. -
További szerzők:Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus) Zilizi Gyula (1965-) (fizikus)
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6.

001-es BibID:BIBFORM116672
035-os BibID:(WoS)001165511500005 (Scopus)85174724971
Első szerző:CMS Collaboration
Cím:Proton reconstruction with the CMS-TOTEM Precision Proton Spectrometer / CMS Collaboration, TOTEM Collaboration
Dátum:2023
ISSN:1748-0221
Megjegyzések:The Precision Proton Spectrometer (PPS) of the CMS and TOTEM experiments collected 107.7 fb 1 in proton-proton (pp) collisions at the LHC at 13 TeV(Run 2). This paper describes the key features of the PPS alignment and optics calibrations, the proton reconstruction procedure, as well as the detector efficiency and the performance of the PPS simulation. The reconstruction and simulation are validated using a sample of (semi)exclusive dilepton events. The performance of PPS has proven the feasibility of continuously operating a near-beam proton spectrometer at a high luminosity hadron collider.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Large detector systems for particle and astroparticle physics
Particle tracking detectors
Megjelenés:Journal of Instrumentation. - 18 : 09 (2023), p. 1-79. -
További szerzők:Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus) TOTEM Collaboration
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7.

001-es BibID:BIBFORM118168
035-os BibID:(WoS)001127857800001 (Scopus)85182444219
Első szerző:CMS Collaboration
Cím:Performance of the local reconstruction algorithms for the CMS hadron calorimeter with Run 2 data / CMS Collaboration
Dátum:2023
ISSN:1748-0221
Megjegyzések:A description is presented of the algorithms used to reconstruct energy deposited in the CMS hadron calorimeter during Run 2 (2015-2018) of the LHC. During Run 2, the characteristic bunch-crossing spacing for proton-proton collisions was 25 ns, which resulted in overlapping signals from adjacent crossings. The energy corresponding to a particular bunch crossing of interest is estimated using the known pulse shapes of energy depositions in the calorimeter, which are measured as functions of both energy and time. A variety of algorithms were developed to mitigate the effects of adjacent bunch crossings on local energy reconstruction in the hadron calorimeter in Run 2, and their performance is compared.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Calorimeters
Data reduction methods
Megjelenés:Journal of Instrumentation. - 18 : 11 (2023), p. 1-37. -
További szerzők:Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus) Zilizi Gyula (1965-) (fizikus)
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