Results for " CMS Collaboration"

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Search for natural and split supersymmetry in proton-proton collisions at $\sqrt{s} =$ 13 TeV in final states with jets and missing transverse momentumFeb 06 2018A search for supersymmetry (SUSY) is performed in final states comprising one or more jets and missing transverse momentum using data from proton-proton collisions at a centre-of-mass energy of 13 TeV. The data were recorded with the CMS detector at the ... More
Observation of charge-dependent azimuthal correlations in pPb collisions and its implication for the search for the chiral magnetic effectOct 02 2016Charge-dependent azimuthal particle correlations with respect to the second-order event plane in pPb 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 ... More
Measurement of the inelastic proton-proton cross section at $\sqrt{s}=$ 13 TeVFeb 07 2018A measurement of the inelastic proton-proton cross section with the CMS detector at a center-of-mass energy of $\sqrt{s} =$ 13 TeV is presented. The analysis is based on events with energy deposits in the forward calorimeters, which cover pseudorapidities ... More
Search for heavy neutral leptons in events with three charged leptons in proton-proton collisions at $\sqrt{s} =$ 13 TeVFeb 08 2018A search for a heavy neutral lepton N of Majorana nature decaying into a W boson and a charged lepton is performed using the CMS detector at the LHC. The targeted signature consists of three prompt charged leptons in any flavor combination of electrons ... More
Observation of medium induced modifications of jet fragmentation in PbPb collisions using isolated-photon-tagged jetsJan 15 2018Measurements of fragmentation functions for jets associated with an isolated photon are presented for the first time in pp and PbPb collisions. The analysis uses data collected with the CMS detector at the CERN LHC at a nucleon-nucleon center-of-mass ... More
Measurements of the top-quark properties at CMSAug 15 2013Measurements of several top-quark properties, obtained from the CMS data collected in 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV are presented. The results include measurements of the top pair charge asymmetry, the W helicity in top quark ... More
Selected topics from the single top t-channel: cross section and other propertiesJan 21 2016Measurements of the cross section and of the interactions happening at the tWb vertext are performed in the single top t-channel at center-of-mass energies of 7 and 8 TeV. Results of both ATLAS and CMS collaborations are presented. No indications for ... More
Measurements of high-pT probes in heavy ion collisions at CMSJul 28 2009Sep 23 2009The capabilities of the CMS detector at the LHC will be described for measuring high-pT hadrons, photons and jets in heavy ion collisions. Detailed simulations of various studies planned with the CMS apparatus, including charged particle tracking, jet ... More
Centrality and pT dependence of charged particle RAA in PbPb collisions at sqrt(sNN) = 2.76 TeVJul 10 2011Jul 12 2011The transverse momentum pT spectra of charged particles is measured by CMS as a function of collision centrality in PbPb collisions at sqrt(sNN) = 2.76 TeV. The results are compared to a pp reference spectrum, constructed by interpolation between sqrt(s) ... More
Discovery Potential for the SM Higgs Boson in the Inclusive Search ChannelsOct 25 2007This paper gives an overview of the potential to discover a Standard Model Higgs Boson in the inclusive search channels at the ATLAS and CMS experiments at the LHC. The most important decay modes, $H \to \gamma \gamma$, $H \to WW \to ll\nu\nu$ and $H ... More
Suppression of Upsilon excited states in PbPb collisions at a nucleon-nucleon centre-of-mass energy of 2.76 TeVMay 24 2011A comparison of the relative yields of Upsilon resonances in the mu(+) mu(-) decay channel in PbPb and pp collisions at a centre-of-mass energy per nucleon pair of 2.76 TeV, is performed with data collected with the CMS detector at the LHC. Using muons ... More
Search for Resonances in the Dilepton Mass Distribution in pp Collisions at sqrt(s) = 7 TeVMar 04 2011Jun 14 2011A search for narrow resonances at high mass in the dimuon and dielectron channels has been performed by the CMS experiment at the CERN LHC, using pp collision data recorded at sqrt(s)=7 TeV. The event samples correspond to integrated luminosities of 40 ... More
Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at 7 TeVFeb 10 2011Apr 21 2011Dijet angular distributions are measured over a wide range of dijet invariant masses in pp collisions at sqrt(s) = 7 TeV, at the CERN LHC. The event sample, recorded with the CMS detector, corresponds to an integrated luminosity of 36 inverse picobarns. ... More
Measurement of Bose-Einstein Correlations in pp Collisions at sqrt(s)=0.9 and 7 TeVJan 18 2011Bose-Einstein correlations between identical particles are measured in samples of proton-proton collisions at 0.9 and 7 TeV centre-of-mass energies, recorded by the CMS experiment at the LHC. The signal is observed in the form of an enhancement of number ... More
Search for Heavy Stable Charged Particles in pp collisions at sqrt(s)=7 TeVJan 09 2011The result of a search at the LHC for heavy stable charged particles produced in pp collisions at sqrt(s) = 7 TeV is described. The data sample was collected with the CMS detector and corresponds to an integrated luminosity of 3.1 inverse picobarns. Momentum ... More
Measurement of the Inclusive Upsilon production cross section in pp collisions at sqrt(s)=7 TeVDec 26 2010The Upsilon production cross section in proton-proton collisions at sqrt(s) = 7 TeV is measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1 +/- 0.3 inverse picobarns. Integrated over ... More
Search for Dijet Resonances in 7 TeV pp Collisions at CMSOct 01 2010Nov 18 2010A search for narrow resonances in the dijet mass spectrum is performed using data corresponding to an integrated luminosity of 2.9 inverse pb collected by the CMS experiment at the LHC. Upper limits at the 95% confidence level (CL) are presented on the ... More
Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions at the LHCSep 21 2010Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7 TeV are presented, using data collected with the CMS detector over a broad range of pseudorapidity (eta) ... More
Commissioning and Performance of the CMS Pixel Tracker with Cosmic Ray MuonsNov 29 2009Feb 02 2010The pixel detector of the Compact Muon Solenoid experiment consists of three barrel layers and two disks for each endcap. The detector was installed in summer 2008, commissioned with charge injections, and operated in the 3.8 T magnetic field during cosmic ... More
CMS Data Processing Workflows during an Extended Cosmic Ray RunNov 25 2009Jan 15 2010The CMS Collaboration conducted a month-long data taking exercise, the Cosmic Run At Four Tesla, during October-November 2008, with the goal of commissioning the experiment for extended operation. With all installed detector systems participating, CMS ... More
Performance Study of the CMS Barrel Resistive Plate Chambers with Cosmic RaysNov 20 2009Jan 05 2010In October and November 2008, the CMS collaboration conducted a programme of cosmic ray data taking, which has recorded about 270 million events. The Resistive Plate Chamber system, which is part of the CMS muon detection system, was successfully operated ... More
Search for third-generation scalar leptoquarks in the t-tau channel in proton-proton collisions at sqrt(s) = 8 TeVMar 31 2015Jul 28 2015A search for pair production of third-generation scalar leptoquarks decaying to top quark and tau lepton pairs is presented using proton-proton collision data at a center-of-mass energy of sqrt(s) = 8 TeV collected with the CMS detector at the LHC and ... More
Measurement of the t-channel single top quark production cross section in pp collisions at sqrt(s) = 7 TeVJun 15 2011Electroweak production of the top quark is measured in pp collisions at sqrt(s) = 7 TeV, using a dataset collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 36 inverse picobarns. With an event selection optimized ... More
Search for new physics with same-sign isolated dilepton events with jets and missing transverse energy at the LHCApr 15 2011The results of searches for new physics in events with two same-sign isolated leptons, hadronic jets, and missing transverse energy in the final state are presented. The searches use an integrated luminosity of 35 inverse picobarns of pp collision data ... More
Measurement of the B0 production cross section in pp Collisions at sqrt(s) = 7 TeVApr 14 2011Jun 30 2011Measurements of the differential production cross sections in transverse momentum and rapidity for B0 mesons produced in pp collisions at sqrt(s) = 7 TeV are presented. The dataset used was collected by the CMS experiment at the LHC and corresponds to ... More
Inclusive b-hadron production cross section with muons in pp collisions at sqrt(s) = 7 TeVJan 18 2011A measurement of the b-hadron production cross section in proton-proton collisions at sqrt(s)=7 TeV is presented. The dataset, corresponding to 85 inverse nanobarns, was recorded with the CMS experiment at the LHC using a low-threshold single-muon trigger. ... More
Performance of the CMS Level-1 Trigger during Commissioning with Cosmic Ray MuonsNov 28 2009Mar 01 2010The CMS Level-1 trigger was used to select cosmic ray muons and LHC beam events during data-taking runs in 2008, and to estimate the level of detector noise. This paper describes the trigger components used, the algorithms that were executed, and the ... More
Alignment of the CMS Muon System with Cosmic-Ray and Beam-Halo MuonsNov 20 2009Feb 08 2010The CMS muon system has been aligned using cosmic-ray muons collected in 2008 and beam-halo muons from the 2008 LHC circulating beam tests. After alignment, the resolution of the most sensitive coordinate is 80 microns for the relative positions of superlayers ... More
Search for Supersymmetry in Events with b Jets and Missing Transverse Momentum at the LHCJun 16 2011A search for supersymmetry is presented using a sample of events with b jets and missing transverse momentum. The search uses a data sample of proton-proton collisions at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 35 ... More
First Measurement of Hadronic Event Shapes in pp Collisions at sqrt(s)=7 TeVFeb 01 2011Hadronic event shapes have been measured in proton-proton collisions at sqrt(s)=7 TeV, with a data sample collected with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 3.2 inverse picobarns. Event-shape distributions, ... More
Search for supersymmetry in events with photons and missing transverse energy in pp collisions at 13 TeVNov 20 2016The results of a search for new physics in final states with photons and missing transverse energy are reported. The study is based on a sample of proton-proton collisions collected at a center-of-mass energy of 13 TeV with the CMS detector in 2015, corresponding ... More
Observation of a diffractive contribution to dijet production in proton-proton collisions at sqrt(s) = 7 TeVSep 09 2012Mar 13 2013The cross section for dijet production in pp collisions at sqrt(s) = 7 TeV is presented as a function of xi, a variable that approximates the fractional momentum loss of the scattered proton in single-diffractive events. The analysis is based on an integrated ... More
Search for exclusive or semi-exclusive photon pair production and observation of exclusive and semi-exclusive electron pair production in pp collisions at sqrt(s) = 7 TeVSep 07 2012Mar 13 2013A search for exclusive or semi-exclusive photon pair production, pp to p(*) + photon pair + p(*) (where p(*) stands for a diffractively-dissociated proton), and the observation of exclusive and semi-exclusive electron pair production, pp to p(*) + ee ... More
Measurement of electroweak production of two jets in association with a Z boson in proton-proton collisions at sqrt(s)= 8 TeVOct 12 2014Feb 12 2015The purely electroweak (EW) cross section for the production of two jets in association with a Z boson, in proton-proton collisions at sqrt(s) = 8 TeV, is measured using data recorded by the CMS experiment at the CERN LHC, corresponding to an integrated ... More
Searches for heavy Higgs bosons in two-Higgs-doublet models and for t to ch decay using multilepton and diphoton final states in pp collisions at 8 TeVOct 10 2014Dec 30 2014Searches are presented for heavy scalar (H) and pseudoscalar (A) Higgs bosons posited in the two doublet model (2HDM) extensions of the standard model (SM). These searches are based on a data sample of pp collisions collected with the CMS experiment at ... More
Description and performance of track and primary-vertex reconstruction with the CMS trackerMay 26 2014Oct 28 2014A description is provided of the software algorithms developed for the CMS tracker both for reconstructing charged-particle trajectories in proton-proton interactions and for using the resulting tracks to estimate the positions of the LHC luminous region ... More
Search for anomalous production of events with three or more leptons in pp collisions at sqrt(s) = 8 TeVApr 23 2014Aug 21 2014A search for physics beyond the standard model in events with at least three leptons is presented. The data sample, corresponding to an integrated luminosity of 19.5 inverse femtobarns of proton-proton collisions with center-of-mass energy sqrt(s) = 8 ... More
A search for WW gamma and WZ gamma production and constraints on anomalous quartic gauge couplings in pp collisions at sqrt(s) = 8 TeVApr 17 2014Aug 27 2014A search for WV gamma triple vector boson production is presented based on events containing a W boson decaying to a muon or an electron and a neutrino, a second V (W or Z) boson, and a photon. The data correspond to an integrated luminosity of 19.3 inverse ... More
Search for anomalous production of multilepton events in pp collisions at sqrt(s) = 7 TeVApr 24 2012Jan 24 2013A search for anomalous production of events with three or more isolated leptons in pp collisions at sqrt(s) = 7 TeV is presented. The data, corresponding to an integrated luminosity of 4.98 inverse femtobarns, were collected by the CMS experiment at the ... More
Ratios of dijet production cross sections as a function of the absolute difference in rapidity between jets in proton-proton collisions at sqrt(s) = 7 TeVApr 03 2012Jan 23 2013A study of dijet production in proton-proton collisions was performed at sqrt(s) = 7 TeV for jets with pt > 35 GeV and abs(y) < 4.7 using data collected with the CMS detector at the LHC in 2010. Events with at least one pair of jets are denoted as "inclusive". ... More
Search for heavy, top-like quark pair production in the dilepton final state in pp collisions at sqrt(s) = 7 TeVMar 24 2012Jul 27 2014The results of a search for pair production of a heavy, top-like quark, t', in the decay mode (t' anti-t') to (b anti-W anti-b W) to (b anti-lepton neutrino anti-b lepton anti-neutrino) are presented. The search is performed with a data sample corresponding ... More
Search for quark compositeness in dijet angular distributions from pp collisions at sqrt(s) = 7 TeVFeb 24 2012Jul 27 2014A search for quark compositeness using dijet angular distributions from pp collisions at sqrt(s) = 7 TeV is presented. The search has been carried out using a data sample corresponding to an integrated luminosity of 2.2 inverse femtobarns, recorded by ... More
Search for large extra dimensions in dimuon and dielectron events in pp collisions at sqrt(s) = 7 TeVFeb 17 2012Jan 22 2013Results are presented from a search for large, extra spatial dimensions in events with either two isolated muons or two isolated electrons. The data are from proton-proton interactions at sqrt(s) = 7 TeV collected with the CMS detector at the LHC. The ... More
Measurement of four-jet production in proton-proton collisions at sqrt(s) = 7 TeVDec 22 2013Jun 12 2014Measurements of the differential cross sections for the production of exactly four jets in proton-proton collisions are presented as a function of the transverse momentum pt and pseudorapidity eta, together with the correlations in azimuthal angle and ... More
Evidence of b-jet quenching in PbPb collisions at sqrt(s[NN]) = 2.76 TeVDec 15 2013Sep 25 2014The production of jets associated to bottom quarks is measured for the first time in PbPb collisions at a center-of-mass energy of 2.76 TeV per nucleon pair. Jet spectra are reported in the transverse momentum (pt) range of 80-250 GeV, and within pseudorapidity ... More
Search for top squark and higgsino production using diphoton Higgs boson decaysDec 11 2013Apr 28 2014Results are presented of a search for a "natural" supersymmetry scenario with gauge mediated symmetry breaking. It is assumed that only the supersymmetric partners of the top quark (the top squark) and the Higgs boson (higgsino) are accessible. Events ... More
Studies of azimuthal dihadron correlations in ultra-central PbPb collisions at sqrt(s[NN]) = 2.76 TeVDec 06 2013Feb 25 2014Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at sqrt(s[NN]) = 2.76 TeV by the CMS collaboration, using data from the 2011 LHC heavy-ion run. The data set includes a sample of ultra-central (0-0.2% centrality) ... More
Jet and underlying event properties as a function of particle multiplicity in proton-proton collisions at sqrt(s) = 7 TeVOct 17 2013Dec 13 2013Characteristics of multi-particle production in proton-proton collisions at sqrt(s) = 7 TeV are studied as a function of the charged-particle multiplicity, N[ch]. The produced particles are separated into two classes: those belonging to jets and those ... More
Observation of a peaking structure in the J/psi phi mass spectrum from B(+/-) to J/psi phi K(+/-) decaysSep 26 2013Jun 10 2014A peaking structure in the J/psi phi mass spectrum near threshold is observed in B(+/-) to J/psi phi K(+/-) decays, produced in pp collisions at sqrt(s) = 7 TeV collected with the CMS detector at the LHC. The data sample, selected on the basis of the ... More
Measurement of the production cross section for Z gamma to nu nu gamma in pp collisions at sqrt(s) = 7 TeV and limits on Z Z gamma and Z gamma gamma triple gauge boson couplingsSep 04 2013Nov 30 2013A measurement of the Z gamma to nu nu-bar gamma cross section in pp collisions at sqrt(s) = 7 TeV is presented, using data corresponding to an integrated luminosity of 5.0 inverse femtobarns collected with the CMS detector. This measurement is based on ... More
Search for B(s) and B to dimuon decays in pp collisions at 7 TeVJul 28 2011A search for the rare decays B(s) to dimuons and B0 to dimuons is performed in pp collisions at sqrt(s)=7 TeV, with a data sample corresponding to an integrated luminosity of 1.14 inverse femtobarns, collected by the CMS experiment at the LHC. In both ... More
Missing transverse energy performance of the CMS detectorJun 24 2011During 2010 the LHC delivered pp collisions with a centre-of-mass energy of 7 TeV. In this paper, the results of comprehensive studies of missing transverse energy as measured by the CMS detector are presented. The results cover the measurements of the ... More
Observation of the diphoton decay of the Higgs boson and measurement of its propertiesJul 02 2014Oct 22 2014Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of some of its properties are reported. The analysis uses the entire dataset collected by the CMS experiment in proton-proton collisions during the 2011 and ... More
Measurement of the ratio of inclusive jet cross sections using the anti-kt algorithm with radius parameters R = 0.5 and 0.7 in pp collisions at sqrt(s) = 7 TeVJun 02 2014Oct 28 2014Measurements of the inclusive jet cross section with the anti-kt clustering algorithm are presented for two radius parameters, R=0.5 and 0.7. They are based on data from LHC proton-proton collisions at sqrt(s) = 7 TeV corresponding to an integrated luminosity ... More
Measurement of WZ and ZZ production in pp collisions at sqrt(s) = 8 TeV in final states with b-tagged jetsMar 12 2014Aug 11 2014Measurements are reported of the WZ and ZZ production cross sections in proton-proton collisions at sqrt(s) = 8 TeV in final states where one Z boson decays to b-tagged jets. The other gauge boson, either W or Z, is detected through its leptonic decay ... More
Search for new physics in the multijet and missing transverse momentum final state in proton-proton collisions at sqrt(s) = 8 TeVFeb 19 2014Jul 07 2014A search for new physics is performed in multijet events with large missing transverse momentum produced in proton-proton collisions at sqrt(s) = 8 TeV using a data sample corresponding to an integrated luminosity of 19.5 inverse femtobarns collected ... More
Measurement of differential cross sections for top quark pair production using the lepton+jets final state in proton-proton collisions at 13 TeVOct 13 2016Differential and double-differential cross sections for the production of top quark pairs in proton-proton collisions at 13 TeV are measured as a function of jet multiplicity and of kinematic variables of the top quarks and the top quark-antiquark system. ... More
Search for resonant production of high-mass photon pairs in proton-proton collisions at sqrt(s) = 8 and 13 TeVJun 13 2016Aug 22 2016A search for the resonant production of high-mass photon pairs is presented. The analysis is based on samples of proton-proton collision data collected by the CMS experiment at center-of-mass energies of 8 and 13 TeV, corresponding to integrated luminosities ... More
Search for dark matter particles in proton-proton collisions at sqrt(s) = 8 TeV using the razor variablesMar 29 2016A search for dark matter particles directly produced in proton-proton collisions recorded by the CMS experiment at the LHC is presented. The data correspond to an integrated luminosity of 18.8 inverse femtobarns, at a center-of-mass energy of 8 TeV. The ... More
Search for new physics with the MT2 variable in all-jets final states produced in pp collisions at sqrt(s) = 13 TeVMar 13 2016Oct 06 2016A search for new physics is performed using events that contain one or more jets, no isolated leptons, and a large transverse momentum imbalance, as measured through the MT2 variable, which is an extension of the transverse mass in events with two invisible ... More
Search for s channel single top quark production in pp collisions at sqrt(s) = 7 and 8 TeVMar 08 2016Sep 22 2016A search is presented for single top quark production in the s channel in proton-proton collisions with the CMS detector at the CERN LHC in decay modes of the top quark containing a muon or an electron in the final state. The signal is extracted through ... More
Measurement of the production cross section for a W boson and two b jets in pp collisions at sqrt(s) = 7 TeVDec 23 2013Jul 10 2014The production cross section for a W boson and two b jets is measured using proton-proton collisions at sqrt(s) = 7 TeV in a data sample collected with the CMS experiment at the LHC corresponding to an integrated luminosity of 5.0 inverse femtobarns. ... More
Measurement of the properties of a Higgs boson in the four-lepton final stateDec 18 2013Jun 10 2014The properties of a Higgs boson candidate are measured in the H to ZZ to 4l decay channel, with l = e, mu, using data from pp collisions corresponding to an integrated luminosity of 5.1 inverse femtobarns at the center-of-mass energy of sqrt(s) = 7 TeV ... More
Measurement of Higgs boson production and properties in the WW decay channel with leptonic final statesDec 04 2013Mar 10 2014A search for the standard model Higgs boson decaying to a W-boson pair at the LHC is reported. The event sample corresponds to an integrated luminosity of 4.9 and 19.4 inverse femtobarns collected with the CMS detector in pp collisions at sqrt(s) = 7 ... More
Correlations between jets and charged particles in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeVJan 01 2016Mar 02 2016The quark-gluon plasma is studied via medium-induced changes to correlations between jets and charged particles in PbPb collisions compared to pp reference data. This analysis uses data sets from PbPb and pp collisions with integrated luminosities of ... More
Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse momentum in proton-proton collisions at sqrt(s) = 8 TeVDec 25 2015May 26 2016Results are presented from a search for supersymmetric particles in scenarios with a compressed mass spectrum. The data sample corresponds to 19.7 inverse femtobarns of proton-proton collisions recorded by the CMS experiment at sqrt(s) = 8 TeV. The search ... More
Observation of top quark pairs produced in association with a vector boson in pp collisions at sqrt(s) = 8 TeVOct 05 2015Feb 08 2016Measurements of the cross sections for top quark pairs produced in association with a W or Z boson are presented, using 8 TeV pp collision data corresponding to an integrated luminosity of 19.5 inverse femtobarns, collected by the CMS experiment at the ... More
Search for the production of an excited bottom quark decaying to tW in proton-proton collisions at sqrt(s) = 8 TeVSep 27 2015Feb 03 2016A search is presented for a singly produced excited bottom quark (b*) decaying to a top quark and a W boson in the all-hadronic, lepton + jets, and dilepton final states in proton-proton collisions at sqrt(s) = 8 TeV recorded by the CMS experiment at ... More
Search for pair production of first and second generation leptoquarks in proton-proton collisions at sqrt(s) = 8 TeVSep 12 2015Mar 04 2016A search for pair production of first and second generation leptoquarks is performed in final states containing either two charged leptons and two jets, or one charged lepton, one neutrino and two jets, using proton-proton collision data at sqrt(s) = ... More
Search for supersymmetry in the vector-boson fusion topology in proton-proton collisions at sqrt(s) = 8 TeVAug 30 2015May 17 2016The first search for supersymmetry in the vector-boson fusion topology is presented. The search targets final states with at least two leptons, large missing transverse momentum, and two jets with a large separation in rapidity. The data sample corresponds ... More
Search for W' decaying to tau lepton and neutrino in proton-proton collisions at sqrt(s) = 8 TeVAug 18 2015Nov 29 2016The first search for a heavy charged vector boson in the final state with a tau lepton and a neutrino is reported, using 19.7 inverse femtobarns of LHC data at sqrt(s) = 8 TeV. A signal would appear as an excess of events in kinematic regions where the ... More
Search for neutral MSSM Higgs bosons decaying to mu+ mu- in pp collisions at sqrt(s) = 7 and 8 TeVAug 06 2015Dec 18 2015A search for neutral Higgs bosons predicted in the minimal supersymmetric standard model (MSSM) for mu+ mu- decay channels is presented. The analysis uses data collected by the CMS experiment at the LHC in proton-proton collisions at centre-of-mass energies ... More
Multiplicity and transverse-momentum dependence of two- and four-particle correlations in pPb and PbPb collisionsMay 03 2013Jul 12 2013Measurements of two- and four-particle angular correlations for charged particles emitted in pPb collisions are presented over a wide range in pseudorapidity and full azimuth. The data, corresponding to an integrated luminosity of approximately 31 inverse ... More
Measurement of the ratio of the inclusive 3-jet cross section to the inclusive 2-jet cross section in pp collisions at sqrt(s) = 7 TeV and first determination of the strong coupling constant in the TeV rangeApr 28 2013Nov 30 2013A measurement is presented of the ratio of the inclusive 3-jet cross section to the inclusive 2-jet cross section as a function of the average transverse momentum, <pT[1,2]>, of the two leading jets in the event. The data sample was collected during 2011 ... More
Search for supersymmetry in hadronic final states with missing transverse energy using the variables AlphaT and b-quark multiplicity in pp collisions at 8 TeVMar 12 2013Oct 29 2013An inclusive search for supersymmetric processes that produce final states with jets and missing transverse energy is performed in pp collisions at a centre-of-mass energy of 8 TeV. The data sample corresponds to an integrated luminosity of 11.7 inverse ... More
Searches for Higgs bosons in pp collisions at sqrt(s) = 7 and 8 TeV in the context of four-generation and fermiophobic modelsFeb 07 2013Jul 12 2013Searches are reported for Higgs bosons in the context of either the standard model extended to include a fourth generation of fermions (SM4) with masses of up to 600 GeV or fermiophobic models. For the former, results from three decay modes (tau tau, ... More
Search for long-lived particles in events with photons and missing energy in proton-proton collisions at sqrt(s) = 7 TeVDec 08 2012May 08 2013Results are presented from a search for long-lived neutralinos decaying into a photon and an invisible particle, a signature associated with gauge-mediated supersymmetry breaking in supersymmetric models. The analysis is based on a 4.9 inverse femtobarn ... More
Search for heavy quarks decaying into a top quark and a W or Z boson using lepton + jets events in pp collisions at sqrt(s) = 7 TeVOct 28 2012Mar 11 2013Results are presented from a search for the pair-production of heavy quarks, Q Q-bar, that decay exclusively into a top quark and a W or Z boson. The search is performed using a sample of proton-proton collisions at sqrt(s) = 7 TeV corresponding to an ... More
Search for neutral color-octet weak-triplet scalar particles in proton-proton collisions at sqrt(s) = 8 TeVMay 29 2015Oct 29 2015A search for pair production of neutral color-octet weak-triplet scalar particles (Theta) is performed in processes where one Theta decays to a pair of b quark jets and the other to a Z boson plus a jet, with the Z boson decaying to a pair of electrons ... More
Study of W boson production in pPb collisions at sqrt(s[NN]) = 5.02 TeVMar 19 2015Dec 29 2015The first study of W boson production in pPb collisions is presented, for bosons decaying to a muon or electron, and a neutrino. The measurements are based on a data sample corresponding to an integrated luminosity of 34.6 inverse nanobarns at a nucleon-nucleon ... More
Search for lepton-flavour-violating decays of the Higgs bosonFeb 25 2015Aug 21 2015The first direct search for lepton-flavour-violating decays of the recently discovered Higgs boson (H) is described. The search is performed in the H to mu tau[e] and H to mu tau[h] channels, where tau[e] and tau[h] are tau leptons reconstructed in the ... More
Search for physics beyond the standard model in events with two leptons, jets, and missing transverse momentum in pp collisions at sqrt(s) = 8 TeVFeb 20 2015May 15 2015A search is presented for physics beyond the standard model in final states with two opposite-sign same-flavor leptons, jets, and missing transverse momentum. The data sample corresponds to an integrated luminosity of 19.4 inverse femtobarns of proton-proton ... More
Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeVDec 30 2014Jun 15 2015Properties of the Higgs boson with mass near 125 GeV are measured in proton-proton collisions with the CMS experiment at the LHC. Comprehensive sets of production and decay measurements are combined. The decay channels include gamma gamma, ZZ, WW, tau ... More
Measurement of the cross section ratio sigma(t t-bar b b-bar) / sigma(t t-bar jj) in pp collisions at sqrt(s) = 8 TeVNov 20 2014May 18 2015The first measurement of the cross section ratio sigma(t t-bar b b-bar) / sigma(t t-bar jj) is presented using a data sample corresponding to an integrated luminosity of 19.6 inverse femtobarns collected in pp collisions at sqrt(s) = 8 TeV with the CMS ... More
Search for dijet resonances in proton-proton collisions at sqrt(s) = 13 TeV and constraints on dark matter and other modelsNov 11 2016A search is presented for narrow resonances decaying to dijet final states in proton-proton collisions at sqrt(s)=13 TeV using data corresponding to an integrated luminosity of 12.9 inverse femtobarns. The dijet mass spectrum is well described by a smooth ... More
Charged-particle nuclear modification factors in PbPb and pPb collisions at sqrt(s[NN)]=5.02 TeVNov 05 2016The spectra of charged particles produced within the pseudorapidity window abs(eta)<1 at sqrt(s[NN])=5.02 TeV are measured using 404 inverse microbarns of PbPb and 27.4 inverse picobarns of pp data collected by the CMS detector at the LHC in 2015. The ... More
A search for new phenomena in pp collisions at sqrt(s) = 13 TeV in final states with missing transverse momentum and at least one jet using the alphaT variableNov 01 2016A search for new phenomena is performed in final states containing one or more jets and an imbalance in transverse momentum in pp collisions at a centre-of-mass energy of 13 TeV. The analysed data sample, recorded with the CMS detector at the CERN LHC, ... More
Search for long-lived charged particles in proton-proton collisions at sqrt(s) = 13 TeVSep 27 2016Results are presented of a search for heavy stable charged particles produced in proton-proton collisions at sqrt(s) = 13 TeV using a data sample corresponding to an integrated luminosity of 2.5 inverse femtobarns collected in 2015 with the CMS detector ... More
Inclusive search for supersymmetry using razor variables in pp collisions at sqrt(s) = 13 TeVSep 24 2016An inclusive search for supersymmetry using razor variables is performed in events with four or more jets and no more than one lepton. The results are based on a sample of proton-proton collisions corresponding to an integrated luminosity of 2.3 inverse-femtobarns ... More
Search for narrow resonances in dilepton mass spectra in proton-proton collisions at sqrt(s) = 13 TeV and combination with 8 TeV dataSep 17 2016A search for narrow resonances in dielectron and dimuon invariant mass spectra has been performed using data obtained from proton-proton collisions at sqrt(s)=13 TeV collected with the CMS detector. The integrated luminosity for the dielectron sample ... More
Measurement of the total and differential inclusive B(+) hadron cross sections in pp collisions at sqrt(s) = 13 TeVSep 03 2016The total and differential cross sections for inclusive production of B(+) hadrons are measured as a function of the B(+) transverse momentum pT[B] and rapidity y[B] in pp collisions at a centre-of-mass energy of 13 TeV, using data collected by the CMS ... More
Evidence for collectivity in pp collisions at the LHCJun 20 2016Measurements of two- and multi-particle angular correlations in pp collisions at sqrt(s) = 5, 7, and 13 TeV are presented as a function of charged-particle multiplicity. The data, corresponding to integrated luminosities of 1.0 inverse picobarns (5 TeV), ... More
Phenomenological MSSM interpretation of CMS searches in pp collisions at sqrt(s) = 7 and 8 TeVJun 11 2016Oct 30 2016Searches for new physics by the CMS collaboration are interpreted in the framework of the phenomenological minimal supersymmetric standard model (pMSSM). The data samples used in this study were collected at sqrt(s) = 7 and 8 TeV and have integrated luminosities ... More
Search for top squark pair production in compressed-mass-spectrum scenarios in proton-proton collisions at sqrt(s) = 8 TeV using the alphaT variableMay 29 2016An inclusive search is performed for supersymmetry in final states containing jets and an apparent imbalance in transverse momentum, ptvecmiss, due to the production of unobserved weakly interacting particles in pp collisions at a centre-of-mass energy ... More
Measurement of the differential cross section and charge asymmetry for inclusive pp to W + X production at sqrt(s) = 8 TeVMar 06 2016Aug 23 2016The differential cross section and charge asymmetry for inclusive pp to W + X to mu + neutrino + X production at sqrt(s) = 8 TeV are measured as a function of muon pseudorapidity. The data sample corresponds to an integrated luminosity of 18.8 inverse ... More
Measurements of the t-tbar production cross section in lepton+jets final states in pp collisions at 8 TeV and ratio of 8 to 7 TeV cross sectionsFeb 29 2016A measurement of the top quark pair production (t-tbar) cross section in proton-proton collisions at the centre-of-mass energy of 8 TeV is presented using data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.6 ... More
Search for supersymmetry in the multijet and missing transverse momentum final state in pp collisions at 13 TeVFeb 21 2016May 11 2016A search for new physics is performed based on all-hadronic events with large missing transverse momentum produced in proton-proton collisions at sqrt(s) = 13 TeV. The data sample, corresponding to an integrated luminosity of 2.3 inverse femtobarns, was ... More
Measurement of spin correlations in t t-bar production using the matrix element method in the muon + jets final state in pp collisions at sqrt(s) = 8 TeVNov 19 2015May 19 2016The consistency of the spin correlation strength in top quark pair production with the standard model (SM) prediction is tested in the muon + jets final state. The events are selected from pp collisions, collected by the CMS detector, at a centre-of-mass ... More
Measurement of the t t-bar production cross section in the all-jets final state in pp collisions at sqrt(s) = 8 TeVSep 21 2015Mar 14 2016The cross section for t t-bar production in the all-jets final state is measured in pp collisions at a centre-of-mass energy of 8 TeV at the LHC with the CMS detector, in data corresponding to an integrated luminosity of 18.4 inverse femtobarns. The inclusive ... More
Search for single production of scalar leptoquarks in proton-proton collisions at sqrt(s) = 8 TeVSep 12 2015Apr 27 2016A search is presented for the production of both first- and second-generation scalar leptoquarks with a final state of either two electrons and one jet or two muons and one jet. A data sample of proton-proton collisions at center-of-mass energy sqrt(s) ... More