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Test beam demonstration of silicon microstrip modules with transverse momentum discrimination for the future CMS tracking detector
(2018)Journal of InstrumentationJournal Article -
Particle-flow reconstruction and global event description with the CMS detector
(2017)Journal of InstrumentationJournal Article -
Measurement of inclusive jet cross-sections in pp and PbPb collisions at √sNN=2.76 TeV
(2017)Physical Review CInclusive jet spectra from pp and PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76TeV, collected with the CMS detector at the CERN Large Hadron Collider, are presented. Jets are reconstructed with three different distance parameters (R=0.2, 0.3, and 0.4) for transverse momentum (pT) greater than 70GeV/c and pseudorapidity |η|<2. Next-to-leading-order quantum chromodynamic calculations with nonperturbative corrections are ...Journal Article -
Pseudorapidity dependence of long-range two-particle correlations in pPb collisions at √sNN=5.02 TeV
(2017)Physical Review CTwo-particle correlations in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02TeV are studied as a function of the pseudorapidity separation (Δη) of the particle pair at small relative azimuthal angle (|Δϕ|<π/3). The correlations are decomposed into a jet component that dominates the short-range correlations (|Δη|<1), and a component that persists at large Δη and may originate from collective behavior of the produced system. ...Journal Article -
P-Type Silicon Strip Sensors for the new CMS Tracker at HL-L-HC
(2017)Journal of InstrumentationThe upgrade of the LHC to the High-Luminosity LHC (HL-LHC) is expected to increase the LHC design luminosity by an order of magnitude. This will require silicon tracking detectors with a significantly higher radiation hardness. The CMS Tracker Collaboration has conducted an irradiation and measurement campaign to identify suitable silicon sensor materials and strip designs for the future outer tracker at the CMS experiment. Based on these ...Journal Article -
Test beam performance measurements for the Phase I upgrade of the CMS pixel detector
(2017)Journal of InstrumentationA new pixel detector for the CMS experiment was built in order to cope with the instantaneous luminosities anticipated for the Phase I Upgrade of the LHC . The new CMS pixel detector provides four-hit tracking with a reduced material budget as well as new cooling and powering schemes. A new front-end readout chip mitigates buffering and bandwidth limitations, and allows operation at low comparator thresholds. In this paper, comprehensive ...Journal Article -
Mechanical stability of the CMS strip tracker measured with a laser alignment system
(2017)Journal of InstrumentationThe CMS tracker consists of 206 m2 of silicon strip sensors assembled on carbon fibre composite structures and is designed for operation in the temperature range from −25 to +25°C. The mechanical stability of tracker components during physics operation was monitored with a few μm resolution using a dedicated laser alignment system as well as particle tracks from cosmic rays and hadron-hadron collisions. During the LHC operational period ...Journal Article -
Observation of charge-dependent azimuthal correlations in pPb collisions and its implication for the search for the chiral magnetic effect
(2017)Physical Review LettersCharge-dependent azimuthal particle correlations with respect to the second-order event plane in p−Pb and PbPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV have been studied with the CMS experiment at the LHC. The measurement is performed with a three-particle correlation technique, using two particles with the same or opposite charge within the pseudorapidity range |η|<2.4, and a third particle measured in the hadron ...Journal Article -
Measurements of differential cross sections for associated production of a W boson and jets in proton-proton collisions at √s = 8 TeV
(2017)Physical Review DDifferential cross sections for a W boson produced in association with jets are measured in a data sample of proton-proton collisions at a center-of-mass energy of 8 TeV recorded with the CMS detector and corresponding to an integrated luminosity of 19.6 fb−1. The W bosons are identified through their decay mode W→μν. The cross sections are reported as functions of jet multiplicity, transverse momenta, and the scalar sum of jet transverse ...Journal Article -
Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
(2017)Journal of InstrumentationImproved jet energy scale corrections, based on a data sample corresponding to an integrated luminosity of 19.7 fb-1 collected by the CMS experiment in proton-proton collisions at a center-of-mass energy of 8 TeV, are presented. The corrections as a function of pseudorapidity η and transverse momentum pT are extracted from data and simulated events combining several channels and methods. They account successively for the effects of pileup, ...Journal Article