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CMS Physics Analysis Summaries

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2026-04-17
15:25
Evidence for sequential Upsilon suppression in light ion collisions /CMS Collaboration
Measurements of the three lowest $S$-wave bottomonium resonances, $\Upsilon(1\mathrm{S})$, $\Upsilon(2\mathrm{S})$, and $\Upsilon(3\mathrm{S})$, are presented using data from oxygen-oxygen and neon-neon collisions recorded in 2025 by the CMS detector at the CERN LHC. The data correspond to a nucleon-nucleon center-of-mass energy of $\sqrt{s_{\mathrm{NN}}}=5.36~\mathrm{TeV}$ and integrated luminosities of $8.4~\mathrm{nb}^{-1}$ (oxygen-oxygen) and $0.8~\mathrm{nb}^{-1}$ (neon-neon), with a proton-proton reference sample of $456~\mathrm{pb}^{-1}$ collected at the same energy. [...]
CMS-PAS-HIN-25-015.- Geneva : CERN, 2026 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detaljnije
2026-04-07
21:49
Search for the rare Higgs boson decay H to Z gamma in proton-proton collisions at sqrt(s)=13 and 13.6 TeV /CMS Collaboration
A search is presented for the rare Higgs boson decay $\mathrm{H}\to\mathrm{Z}\gamma$, where $\mathrm{Z}\to \ell^{+}\ell^{-}$ and $\ell^{\pm} = \mathrm{e}^{\pm}$ or $\mu^{\pm}$. The search is performed using a sample of proton-proton (pp) collision data at the center-of-mass energies of 13 and 13.6 TeV, recorded by the CMS experiment at the LHC and corresponding to a total integrated luminosity of 200 $\mathrm{fb}^{-1}$. [...]
CMS-PAS-HIG-25-010.- Geneva : CERN, 2026 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003: 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_007: PDF; Figure_008: PDF; Figure_009: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detaljnije
2026-04-03
15:41
Measurements of inclusive and differential cross sections for Higgs boson production with decay to four leptons in proton-proton collisions at 13.6 TeV /CMS Collaboration
Measurements of Higgs boson ($\mathrm{H}$) production cross sections in the four-lepton ($4\ell, \ell=\mathrm{e},\mu$) final state at a center-of-mass energy $\sqrt{s}=13.6\,\mathrm{TeV}$ are presented. These measurements are based on data collected with the CMS detector at the CERN LHC between 2022 and 2024, corresponding to an integrated luminosity of $171\,\mathrm{fb}^{-1}$. [...]
CMS-PAS-HIG-25-015.- Geneva : CERN, 2026 Figure_001: PNG; Figure_002: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_003-c: PDF; Figure_003-d: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_005-a: PNG; Figure_005-b: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_007-c: PDF; Figure_008-a: PDF; Figure_008-b: PDF; Figure_008-c: PDF; Figure_009-a: PDF; Figure_009-b: PDF; Figure_009-c: PDF; Figure_010-a: PDF; Figure_010-b: PDF; Figure_011-a: PDF; Figure_011-b: PDF; Figure_012-a: PDF; Figure_012-b: PDF; Figure_012-c: PDF; Figure_013-a: PDF; Figure_013-b: PDF; Figure_014-a: PDF; Figure_014-b: PDF; Figure_015-a: PDF; Figure_015-b: PDF; Figure_015-c: PDF; Figure_016: PDF; Figure_017: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detaljnije
2026-03-31
13:50
Measurement of the 3 Top Quark Production /CMS Collaboration
A search for the standard model production of three top quarks is presented. The data analyzed were collected with the CMS detector at the CERN LHC in proton-proton collisions at a center-of-mass energy of $13~\mathrm{TeV}$ and correspond to an integrated luminosity of $138~\mathrm{fb}^{-1}$. [...]
CMS-PAS-TOP-24-006.- Geneva : CERN, 2026 Figure_001: PNG; Figure_002: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_003-c: PDF; Figure_004-a: PDF; Figure_004-b: 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: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detaljnije
2026-03-30
16:28
Evidence of the dead-cone effect in bottom quark initiated jets /CMS Collaboration
The suppression of collinear gluon emissions from a massive quark, or the ``dead-cone effect,'' is the primary manifestation of quark mass effects in parton showers. A differential measurement is presented of the emission density of bottom quarks, studied as a function of the angular separation between the emissions from the same emitter. [...]
CMS-PAS-SMP-25-008.- Geneva : CERN, 2026 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_A001: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detaljnije
2026-03-25
11:39
Search for s-channel production of tau-enriched semivisible jets in proton-proton collisions at 13 TeV /CMS Collaboration
A search for resonant production of $\tau$-enriched semivisible jets from a strongly coupled dark sector in proton-proton collisions at the LHC is presented. The search is performed using data collected by the CMS experiment from 2016 to 2018 at a center-of-mass energy of 13 TeV, corresponding to a total integrated luminosity of $138~\mathrm{fb}^{-1}$. [...]
CMS-PAS-EXO-26-005.- Geneva : CERN, 2026 Figure_001: PDF; Figure_002: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_006: PDF; Figure_007: PDF; Figure_008-a: PDF; Figure_008-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detaljnije
2026-03-24
18:18
Search for long-lived heavy neutral leptons in proton-proton collisions with one prompt muon and a secondary vertex from two displaced muons /CMS Collaboration
A search for heavy neutral leptons (HNLs) is performed in final states with three muons, with one originating from the prompt primary interaction vertex and the other two originate from a common displaced vertex. The analysis strategy is optimized for large HNL decay lengths by considering very displaced muons reconstructed only outside the tracker of the CMS experiment at the CERN LHC. [...]
CMS-PAS-EXO-24-015.- Geneva : CERN, 2026 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_002-c: PDF; Figure_002-d: PDF; Figure_002-e: PDF; Figure_002-f: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_007: PDF; Figure_008: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detaljnije
2026-03-24
14:02
Measurement of angular observables and differential branching fraction for BsToPhiMuMu at 13 TeV /CMS Collaboration
The differential branching fraction of the decay $\mathrm{B_{s}^{0}}\to\phi\mu^{+}\mu^{-}$ is measured in bins of the squared dimuon invariant mass ($q^{2}$) using proton-proton collision data collected with the CMS detector at $\sqrt{s}=13$ TeV at the LHC, corresponding to an integrated luminosity of 138 $\mathrm{fb}^{-1}$. The charge-parity asymmetry and the fraction of longitudinal polarization are also determined as a function of $q^{2}$ through an angular analysis. [...]
CMS-PAS-BPH-23-003.- Geneva : CERN, 2026 Figure_001: PNG; Figure_002: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detaljnije
2026-03-24
13:43
Search for the rare $\mathrm{B^0_s} (\mathrm{B}^0)\to \mu^+ \mu^- \mu^+ \mu^-$ decays in proton-proton collisions /CMS Collaboration
A search for the rare decays $\mathrm{B^0_s}\to \mu^+ \mu^- \mu^+ \mu^-$ and $\mathrm{B}^0 \to \mu^+ \mu^- \mu^+ \mu^-$ is performed with a sample of proton-proton collisions at $\sqrt{s}=13.6\,\mathrm{TeV}$ collected in 2022--2024 and corresponding to an integrated luminosity of $171\,\mathrm{fb}^{-1}$. Signal candidates are reconstructed from four-muon final states and are normalized to the kinematically similar process $\mathrm{B_s}^0 \to \mathrm{J}\!/\!\psi(\mu^+ \mu^-) \phi(\mu^+ \mu^-)$, thus reducing systematic uncertainties. [...]
CMS-PAS-BPH-24-007.- Geneva : CERN, 2026 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002: PDF; Figure_003: PDF; Figure_004: PDF; Figure_005: 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: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detaljnije
2026-03-24
10:06
Search for the lepton flavor violating $\tau^{-}\to\mu^{-}\mu^{+}\mu^{-}$ decay in proton-proton collisions at $\sqrt{s}=13.6~\mathrm{TeV}$ /CMS Collaboration
This work presents a search for lepton flavor violating decay of a tau lepton into three muons ($\tau^{-}\to\mu^{-}\mu^{+}\mu^{-}$) in proton-proton collisions at a center-of-mass energy of $13.6\,\mathrm{TeV}$ collected by the CMS experiment in 2022 and 2023, corresponding to an integrated luminosity of up to $63\,\mathrm{fb}^{-1}$. Two sources of tau leptons are considered: heavy-flavor hadrons and vector boson decays. [...]
CMS-PAS-BPH-24-010.- Geneva : CERN, 2026 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_002-c: PDF; Figure_002-d: PDF; Figure_002-e: PDF; Figure_002-f: PDF; Figure_003-a: PDF; Figure_003-b: 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_005-e: PDF; Figure_005-f: PDF; Figure_006: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detaljnije