Suche
Ergebnisse
-
Search for Narrow Resonances in Dijet Final States at √s=8 TeV with the Novel CMS Technique of Data Scouting
(2016)Physical Review LettersA search for narrow resonances decaying into dijet final states is performed on data from proton-proton collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 18.8 fb−1. The data were collected with the CMS detector using a novel technique called data scouting, in which the information associated with these selected events is much reduced, permitting collection of larger data samples. This technique ...Journal Article -
Study of B Meson Production in p+Pb Collisions at √sNN = 5.02 TeV Using Exclusive Hadronic Decays
(2016)Physical Review LettersThe production cross sections of the B+, B0, and B0s mesons, and of their charge conjugates, are measured via exclusive hadronic decays in p+Pb collisions at the center-of-mass energy √sNN=5.02 TeV with the CMS detector at the CERN LHC. The data set used for this analysis corresponds to an integrated luminosity of 34.6 nb−1. The production cross sections are measured in the transverse momentum range between 10 and 60 GeV/c. No significant ...Journal Article -
Measurements of tt¯ spin correlations and top quark polarization using dilepton final states in pp collisions at √s=8 TeV
(2016)Physical Review DMeasurements of the top quark-antiquark (t¯t) spin correlations and the top quark polarization are presented for t¯t pairs produced in pp collisions at √s=8 TeV. The data correspond to an integrated luminosity of 19.5 fb−1 collected with the CMS detector at the LHC. The measurements are performed using events with two oppositely charged leptons (electrons or muons) and two or more jets, where at least one of the jets is identified as ...Journal Article -
Measurement of the Top Quark Pair Production Cross Section in Proton-Proton Collisions at √s=13 TeV
(2016)Physical Review LettersThe top quark pair production cross section is measured for the first time in proton-proton collisions at √s=13 TeV by the CMS experiment at the CERN LHC, using data corresponding to an integrated luminosity of 43 pb−1. The measurement is performed by analyzing events with at least one electron and one muon of opposite charge, and at least two jets. The measured cross section is 746±58(stat)±53(syst)±36(lumi) pb, in agreement with the ...Journal Article -
Search for Narrow Resonances Decaying to Dijets in Proton-Proton Collisions at √s=13 TeV
(2016)Physical Review LettersA search for narrow resonances in proton-proton collisions at √s=13 TeV is presented. The invariant mass distribution of the two leading jets is measured with the CMS detector using a data set corresponding to an integrated luminosity of 2.4 fb−1. The highest observed dijet mass is 6.1 TeV. The distribution is smooth and no evidence for resonant particles is observed. Upper limits at 95% confidence level are set on the production cross ...Journal Article -
Searches for R-parity-violating supersymmetry in pp collisions at √s=8 TeV in final states with 0–4 leptons
(2016)Physical Review DResults are presented from searches for R-parity-violating supersymmetry in events produced in pp collisions at √s=8 TeV at the LHC. Final states with 0, 1, 2, or multiple leptons are considered independently. The analysis is performed on data collected by the CMS experiment corresponding to an integrated luminosity of 19.5 fb−1. No excesses of events above the standard model expectations are observed, and 95% confidence level limits ...Journal Article -
Measurement of the top quark mass using charged particles in pp collisions at √s=8 TeV
(2016)Physical Review DA novel technique for measuring the mass of the top quark that uses only the kinematic properties of its charged decay products is presented. Top quark pair events with final states with one or two charged leptons and hadronic jets are selected from the data set of 8 TeV proton-proton collisions, corresponding to an integrated luminosity of 19.7 fb−1. By reconstructing secondary vertices inside the selected jets and computing the invariant ...Journal Article -
Search for supersymmetry in pp collisions at √s=8 TeV in final states with boosted W bosons and b jets using razor variables
(2016)Physical Review DA search for supersymmetry in hadronic final states with highly boosted W bosons and b jets is presented, focusing on compressed scenarios. The search is performed using proton-proton collision data at a center-of-mass energy of 8 TeV, collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 19.7 fb−1. Events containing candidates for hadronic decays of boosted W bosons are identified using jet substructure ...Journal Article -
Search for pair-produced vectorlike B quarks in proton-proton collisions at √s=8 TeV
(2016)Physical Review DA search for the production of a heavy B quark, having electric charge −1/3 and vector couplings to W, Z, and H bosons, is carried out using proton-proton collision data recorded at the CERN LHC by the CMS experiment, corresponding to an integrated luminosity of 19.7 fb−1. The B quark is assumed to be pair produced and to decay in one of three ways: to tW, bZ, or bH. The search is carried out in final states with one, two, and more than ...Journal Article -
Search for single production of scalar leptoquarks in proton-proton collisions at √s =8 TeV
(2016)Physical Review DA 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. The search is based on a data sample of proton-proton collisions at center-of-mass energy √s=8 TeV recorded with the CMS detector and corresponding to an integrated luminosity of 19.6 fb−1. Upper limits are set on both the first- and second-generation leptoquark ...Journal Article