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CMS Physics Analysis Summaries

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2023-05-26
17:20
Search for the lepton flavor violating decay tau to 3mu in proton-proton collisions at sqrt(s) = 13 TeV /CMS Collaboration
A search for lepton flavor violating $\tau\to3\mu$ decays is performed using 97.7\fbinv of proton-proton collisions at a center-of-mass energy of 13\TeV collected by the CMS experiment at the LHC in 2017 and 2018. Tau leptons produced in heavy-flavor hadron decays and produced in \PW boson decays are exploited in the analysis. The results of this search are combined with the previous result based on data collected in 2016, to obtain a total integrated luminosity of 131\fbinv. The observed (expected) upper limit at 90\% confidence level on the branching fraction $\mathcal{B}(\tau\to3\mu)$ is $2.9 \times 10^{-8}$ ($2.4 \times 10^{-8}$). The observed (expected) upper limit at 95\% confidence level on the branching fraction $\mathcal{B}(\tau\to3\mu)$ is $3.6 \times 10^{-8}$ ($3.0 \times 10^{-8}$)..
CMS-PAS-BPH-21-005.- Geneva : CERN, 2023 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_002-d: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_003-c: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_004-c: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_005-d: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_006-c: PDF; Figure_007: PNG; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2023-05-24
15:05
Evidence for the Higgs boson decay to a $Z$ boson and a photon at the LHC /CMS Collaboration
The first evidence is presented for the Higgs boson decay to a $Z$ boson and a photon, with a statistical significance of 3.4 standard deviations. The result is derived from a combined analysis of the searches performed by the ATLAS and CMS Collaborations with proton-proton collision data sets collected at the CERN Large Hadron Collider (LHC) from 2015 to 2018. [...]
CMS-PAS-HIG-23-002.- Geneva : CERN, 2023 Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2023-05-24
11:25
Searches for violation of Lorentz invariance in $\mathrm{t}\mathrm{\overline{t}}$ production using dilepton events in proton-proton collisions at $\sqrt{s}=13\,\mathrm{TeV}$ /CMS Collaboration
Violation of Lorentz invariance is searched for using top quark pair ($\mathrm{t}\mathrm{\overline{t}}$) production in proton-proton collisions at the LHC, at a center-of-mass energy of $\sqrt{s}=13\,\mathrm{TeV}$. Events containing one electron and one muon collected with the CMS detector are analyzed in a data sample corresponding to an integrated luminosity of $77.4\,\mathrm{fb}^{-1}$. [...]
CMS-PAS-TOP-22-007.- Geneva : CERN, 2023 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003: PDF; Figure_004: PDF; Figure_005: PDF; Figure_006: PDF; Figure_007: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2023-05-23
22:49
Evidence for tWZ production in proton-proton collisions at $\sqrt{s} = 13~\mathrm{TeV}$ in multilepton final states /CMS Collaboration
We present the first evidence for the standard model production of a top quark in association with a $\mathrm{W}$ and a $\mathrm{Z}$ boson in multilepton final states. The $\mathrm{Z}$ boson is reconstructed via its decays to electron or muon pairs. [...]
CMS-PAS-TOP-22-008.- Geneva : CERN, 2023 Figure_001: PNG; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2023-05-23
22:49
Search for supersymmetry in final states with disappearing tracks in proton-proton collisions at $13~\mathrm{TeV}$ /CMS Collaboration
A search is presented for charged, long-lived supersymmetric particles in final states with one or more disappearing tracks. The search is based on a sample of proton-proton collisions at a center-of-mass energy of $13~\mathrm{TeV}$ collected with the CMS detector at the CERN LHC between 2016 and 2018, corresponding to an integrated luminosity of $137~\mathrm{fb}^{-1}$. [...]
CMS-PAS-SUS-21-006.- Geneva : CERN, 2023 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_001-d: PDF; Figure_001-e: PDF; Figure_001-f: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_002-d: PDF; Figure_002-e: PDF; Figure_002-f: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_003-c: PDF; Figure_003-d: PDF; Figure_003-e: PDF; Figure_003-f: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_004-c: PDF; Figure_004-d: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_005-d: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_006-c: PDF; Figure_006-d: PDF; Figure_006-e: PDF; Figure_006-f: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_007-c: PDF; Figure_007-d: PDF; Figure_007-e: PDF; Figure_007-f: PDF; Figure_008: PDF; Figure_009-a: PNG; Figure_009-b: PNG; Figure_009-c: PNG; Figure_009-d: PNG; Figure_010-a: PNG; Figure_010-b: PNG; Figure_011: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2023-05-21
23:13
Identification of prompt and isolated muons using multivariate techniques at the CMS experiment in proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$ /CMS Collaboration
Prompt and isolated muons as well as muons from heavy flavour decays represent a key object for many analyses at CMS either to select the signal final states or to reject the background events. In this note we present two multivariate techniques that have been developed to provide a highly efficient identification algorithm for muons with transverse momentum greater than $10~\mathrm{GeV}$. [...]
CMS-PAS-MUO-22-001.- Geneva : CERN, 2023 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_002-d: PDF; Figure_002-e: PDF; Figure_002-f: PDF; Figure_002-g: PDF; Figure_002-h: PDF; Figure_002-i: PDF; Figure_003: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_004-c: PDF; Figure_004-d: PDF; Figure_004-e: PDF; Figure_004-f: PDF; Figure_004-g: PDF; Figure_004-h: PDF; Figure_004-i: PDF; Figure_005: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_006-c: PDF; Figure_006-d: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_007-c: PDF; Figure_007-d: PDF; Figure_008-a: PDF; Figure_008-b: PDF; Figure_009-a: PDF; Figure_009-b: PDF; Figure_009-c: PDF; Figure_009-d: PDF; Figure_009-e: PDF; Figure_009-f: PDF; Figure_010-a: PDF; Figure_010-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2023-05-21
19:27
Search for leptoquarks produced in lepton-quark collisions and coupling to $\tau$ leptons /CMS Collaboration
A search for leptoquarks produced in lepton-quark collisions and coupling to $\tau$ leptons is presented. It is based on a data set of proton-proton collision events recorded by the CMS detector at the LHC at a center-of-mass energy of $13~\mathrm{TeV}$ and corresponding to an integrated luminosity of $138~\mathrm{fb}^{-1}$. [...]
CMS-PAS-EXO-22-018.- Geneva : CERN, 2023 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_001-d: PDF; Figure_001-e: PDF; Figure_001-f: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2023-05-21
18:02
Search for narrow trijet resonances in proton-proton collisions at $\sqrt{s}= 13\,$TeV /CMS Collaboration
A search for narrow hadronic resonances decaying to three resolved jets is presented. The search uses $138\,\text{fb}^{-1}$ of proton-proton collision data with a collision center of mass energy of $13\,\text{TeV}$, collected by the CMS detector at the CERN LHC. [...]
CMS-PAS-EXO-22-008.- Geneva : CERN, 2023 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2023-05-21
09:22
Observation of the $\Lambda^{0}_{\mathrm{b}} \to \mathrm{J}/{\psi}\Xi^-\mathrm{K}^{+}$ decay /CMS Collaboration
Using pp collision data corresponding to an integrated luminosity of about $140~\mathrm{fb}^{-1}$ collected by the CMS experiment at $\sqrt{s}= 13~\mathrm{TeV}$ in 2016--2018, the $\Lambda^{0}_{\mathrm{b}} \to \mathrm{J}/{\psi}\,\Xi^{-}\,\mathrm{K}^{+}$ decay is observed for the first time with a significance exceeding 5 standard deviations. The relative branching fraction, with respect to the $\Lambda^{0}_{\mathrm{b}} \to \psi(\mathrm{2S})\,\Lambda$ decay, is measured to be $\mathcal{B}(\Lambda^{0}_{\mathrm{b}} \to \mathrm{J}/{\psi}\,\Xi^{-}\,\mathrm{K}^{+})/\mathcal{B}(\Lambda^{0}_{\mathrm{b}} \to \psi(\mathrm{2S})\,\Lambda) = [2.5\pm 0.8\pm 0.9]\%$, where the first uncertainty is statistical and the second one is systematic..
CMS-PAS-BPH-22-002.- Geneva : CERN, 2023 Figure_001: PDF; Figure_002: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2023-05-21
09:22
Search for a high mass dimuon resonance associated with $\mathrm{b}$ quark jets at $\sqrt{s}=13~\mathrm{TeV}$ /CMS Collaboration
A search for high-mass dimuon resonance production in association with one or more $\mathrm{b}$ quark jets is presented. The study uses proton-proton collision data collected with the CMS detector at the LHC corresponding to an integrated luminosity of $138~\mathrm{fb}^{-1}$ at a center-of-mass energy of $13~\mathrm{TeV}$. [...]
CMS-PAS-EXO-22-016.- Geneva : CERN, 2023 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_001-d: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_004-c: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_006: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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