no code implementations • 8 Mar 2021 • CMS Collaboration
The signal strength modifier $\mu$, defined as the ratio of the Higgs boson production rate in the $4\ell$ channel to the standard model (SM) expectation, is measured to be $\mu$ $=$ 0. 94 $\pm$ 0. 07 (stat) ${}^{+0. 09}_{-0. 08}$ (syst) at a fixed value of $m_\mathrm{H}$ $=$ 125. 38 GeV.
High Energy Physics - Experiment
no code implementations • 26 Feb 2021 • CMS Collaboration
The differential cross section as a function of the dimuon mass is measured in the range 15-600 GeV, for the first time in proton-nucleus collisions.
High Energy Physics - Experiment Nuclear Experiment
no code implementations • 25 Feb 2021 • CMS Collaboration
Jet production in lead-lead (PbPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of 5. 02 TeV is studied with the CMS detector at the LHC, using PbPb and pp data samples corresponding to integrated luminosities of 404 $\mu$b$^{-1}$ and 27. 4 pb$^{-1}$, respectively.
High Energy Physics - Experiment Nuclear Experiment
no code implementations • 25 Feb 2021 • CMS Collaboration
The first evidence for X(3872) production in relativistic heavy ion collisions is reported.
High Energy Physics - Experiment Nuclear Experiment
no code implementations • 17 Feb 2021 • CMS Collaboration
The measurements in the three-jet and Z + two-jet events are based on data collected at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19. 8 fb$^{-1}$.
High Energy Physics - Experiment
no code implementations • 16 Feb 2021 • CMS Collaboration
Upper limits are derived on the production of a narrow heavy resonance Z', and a mass below 3. 5 and 3. 7 TeV is excluded at 95% confidence level in models where the heavy vector boson couples exclusively to fermions and to bosons, respectively.
High Energy Physics - Experiment
no code implementations • 9 Feb 2021 • CMS Collaboration
In this paper, the algorithms used in 2015 and 2016 and their improvements throughout 2017 and 2018 are described.
High Energy Physics - Experiment Instrumentation and Detectors
no code implementations • 15 Dec 2020 • CMS Collaboration
A search for phenomena beyond the standard model in final states with two oppositely charged same-flavor leptons and missing transverse momentum is presented.
High Energy Physics - Experiment
no code implementations • 8 Dec 2020 • CMS Collaboration
Events containing one or more top quarks produced with additional prompt leptons are used to search for new physics within the framework of an effective field theory (EFT).
High Energy Physics - Experiment
no code implementations • 7 Dec 2020 • CMS Collaboration
Measurements are presented of differential cross sections for the production of Z bosons in association with at least one jet initiated by a charm quark in pp collisions at $\sqrt{s} =$ 13 TeV.
High Energy Physics - Experiment
no code implementations • 2 Sep 2020 • CMS Collaboration
The production of Z boson pairs in proton-proton (pp) collisions, pp $\to$ (Z/$\gamma^*$)(Z/$\gamma^*$) $\to$ 2$\ell$ 2$\ell'$, where $\ell,\ell'$ = e or $\mu$, is studied at a center-of-mass energy of 13 TeV with the CMS detector at the CERN LHC.
High Energy Physics - Experiment
no code implementations • 5 Jul 2020 • CMS Collaboration
To extract the values of $\phi_\mathrm{s}$ and $\Delta\Gamma_\mathrm{s}$, a time-dependent and flavor-tagged angular analysis of the $\mu^+\mu^-$K$^+$K$^-$ final state is performed.
High Energy Physics - Experiment
no code implementations • 4 Jul 2020 • CMS Collaboration
The integrated fiducial cross section is measured to be 86. 5 $\pm$ 9. 5 fb, consistent with the Standard Model expectation of 82. 5 $\pm$ 4. 2 fb.
High Energy Physics - Experiment
no code implementations • 1 Mar 2020 • CMS Collaboration
Significant improvements are found in the identification of pileup jets, the jet energy, mass, and angular resolution, missing transverse momentum resolution, and muon isolation when using pileup per particle identification.
High Energy Physics - Experiment Instrumentation and Detectors
no code implementations • 1 Jan 2019 • CMS Collaboration
Studies of on-shell and off-shell Higgs boson production in the four-lepton final state are presented, using data from the CMS experiment at the LHC that correspond to an integrated luminosity of 80. 2 fb$^{-1}$ at a center-of-mass energy of 13 TeV.
High Energy Physics - Experiment
no code implementations • 16 Dec 2018 • CMS Collaboration
A search is presented for a heavy spin-1 resonance Z' decaying to a top quark and a vector-like top quark partner T in the lepton+jets final state.
High Energy Physics - Experiment
no code implementations • 27 Sep 2018 • CMS Collaboration
Additional results are given for parametrizations with varying assumptions on the scaling behavior of the different production and decay modes, including generic ones based on ratios of cross sections and branching fractions or coupling modifiers.
High Energy Physics - Experiment
1 code implementation • 8 Sep 2018 • CMS Collaboration
The algorithm developed by the CMS Collaboration to reconstruct and identify $\tau$ leptons produced in proton-proton collisions at $\sqrt{s}=$ 7 and 8 TeV, via their decays to hadrons and a neutrino, has been significantly improved.
High Energy Physics - Experiment
no code implementations • 25 Oct 2017 • CMS Collaboration
The pseudorapidity distributions of charged hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $\sqrt{s_{_\mathrm{NN}}} =$ 5. 02 and 8. 16 TeV are presented.
High Energy Physics - Experiment
3 code implementations • 29 Sep 2016 • CMS Collaboration
In the first model, each gluino decays via a three-body process to top quarks and a neutralino, which is associated with the observed missing transverse momentum in the event.
High Energy Physics - Experiment
no code implementations • 8 May 2016 • CMS Collaboration
Observed and expected limits on the total width of 26 and 66 MeV are found, respectively, at the 95% confidence level (CL).
High Energy Physics - Experiment
1 code implementation • 26 Oct 2015 • CMS Collaboration
This paper describes the algorithms used by the CMS experiment to reconstruct and identify tau to hadrons + tau neutrino decays during Run 1 of the LHC.
Instrumentation and Detectors High Energy Physics - Experiment
1 code implementation • 13 Jul 2014 • CMS Collaboration
The expected and observed mass limits for a W' boson, as predicted by this model, are 1. 55 and 1. 47 TeV, respectively.
High Energy Physics - Experiment
no code implementations • 14 May 2014 • CMS Collaboration
Constraints are presented on the total width of the recently discovered Higgs boson, Gamma[H], using its relative on-shell and off-shell production and decay rates to a pair of Z bosons, where one Z boson decays to an electron or muon pair, and the other to an electron, muon, or neutrino pair.
High Energy Physics - Experiment
1 code implementation • 3 Jun 2012 • CMS Collaboration
A search is performed in pp collisions at sqrt(s) = 7 TeV for exotic particles decaying via WZ to final states with electrons and muons.
High Energy Physics - Experiment
