CMS Physics Analysis Summaries

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2025-08-23
18:51

Search for s-channel production of lepton-enriched semivisible jets in proton-proton collisions at 13 TeV /CMS Collaboration
A search for resonant production of strongly-coupled dark matter manifesting as lepton-enriched semivisible jets in proton-proton collisions at the LHC is presented. The search is performed using data collected by the CMS experiment during 2016--2018 at a center-of-mass energy of 13 TeV corresponding to a total integrated luminosity of

138 {f b}^{- 1}

$138~\mathrm{fb}^{-1}$ . [...]
CMS-PAS-EXO-24-029.- Geneva : CERN, 2025 Figure_001: PDF; Figure_002: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_006: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-08-23
18:00

Precision luminosity measurement in proton-proton collisions at sqrt{s} = 13 TeV with the CMS detector /CMS Collaboration
The measurement of the integrated luminosity recorded by the CMS detector at the LHC in proton-proton collisions at

\sqrt{s} = 13 T e V

$\sqrt{s}=13~\mathrm{TeV}$ in 2017 and 2018 is reported. The absolute luminosity calibration is obtained with the van der Meer (vdM) method through beam-separation scans that were performed in special accelerator conditions. [...]
CMS-PAS-LUM-20-001.- Geneva : CERN, 2025 Figure_001-a: PDF; Figure_001-b: 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_004-d: PDF; Figure_005: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_008-a: PDF; Figure_008-b: PDF; Figure_009-a: PDF; Figure_009-b: PDF; Figure_010-a: PDF; Figure_010-b: PDF; Figure_011-a: PDF; Figure_011-b: PDF; Figure_012: PDF; Figure_013: PDF; Figure_014: PDF; Figure_015-a: PDF; Figure_015-b: PDF; Figure_015-c: PDF; Figure_015-d: PDF; Figure_016: PDF; Figure_017: PDF; Figure_018: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-08-22
19:39

Search for charged Higgs bosons decaying into a top and a bottom quark in proton-proton collisions at sqrt{s} = 13 TeV /CMS Collaboration
A search is presented for charged Higgs bosons (

H^{\pm}

$\text{H}^\pm$ ) in proton-proton (

pp

$\text{pp}$ ) collision events via the

pp \to (q) H^{\pm}

$\text{pp}\rightarrow(\text{q})\text{H}^\pm$ processes with

H^{\pm} \to tb

$\text{H}^\pm\rightarrow\text{tb}$ decays. The analysis is based on the data collected at a center-of-mass energy of 13 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 138

{fb}^{- 1}

$\text{fb}^{-1}$ . [...]
CMS-PAS-B2G-24-008.- Geneva : CERN, 2025 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_002: 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_007: PDF; Figure_008-a: PDF; Figure_008-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-08-14
19:30

Search for dark matter produced in association with a dark Higgs boson decaying into a bottom quark pair in proton-proton collisions at 13 TeV /CMS Collaboration
A search for dark matter produced in association with a dark Higgs boson decaying into a bottom quark pair has been performed in proton-proton collisions at a center-of-mass energy of 13 TeV collected with the CMS detector during the 2016-2018 data-taking period at the CERN LHC. The analyzed data sample corresponds to an integrated luminosity of 138

{f b}^{- 1}

$\mathrm{fb}^{-1}$ . [...]
CMS-PAS-SUS-23-013.- Geneva : CERN, 2025 Figure_001: PDF; Figure_002: PDF; Figure_003: PDF; Figure_004: PDF; Figure_005: PDF; Figure_006: PDF; Figure_007: PDF; Figure_008: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-08-02
14:42

Simultaneous measurements of $N$ -subjettiness observables in light-flavour quark and gluon jets, and in hadronic decays of boosted W bosons and top quarks /CMS Collaboration
A simultaneous measurement of twenty-five jet substructure observables is presented using large-radius jets with high transverse momentum from proton-proton collisions at

\sqrt{s} = 13

$\sqrt{s}=13$ TeV. The measurement is carried out on QCD dijet events and

t ¯ t

$\mathrm{t\overline{t}}$ events enriched in boosted, hadronic decays of W bosons and top quarks. [...]
CMS-PAS-SMP-22-003.- Geneva : CERN, 2025 Figure_001-a: PDF; Figure_001-b: 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_005-a: PDF; Figure_005-b: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_007: PDF; Figure_008: PDF; Figure_009: PDF; Figure_010: PDF; Figure_011: PDF; Figure_012: 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_016-a: PDF; Figure_016-b: PDF; Figure_017-a: PDF; Figure_017-b: PDF; Figure_017-c: PDF; Figure_017-d: PDF; Figure_018-a: PDF; Figure_018-b: PDF; Figure_018-c: PDF; Figure_018-d: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-08-02
09:45

Particle transformers for identifying Lorentz-boosted Higgs bosons decaying to a pair of W bosonsn /CMS Collaboration
A novel deep neural network classifier, the "particle transformer" (ParT), is introduced for the identification of highly Lorentz-boosted, multi-pronged jets in measurements and searches performed with the CMS detector at the LHC. Based on a self-attention mechanism that allows the model to weigh the importance of different particles, ParT is trained on a wide variety of topologies, notably demonstrating strong performance for the first time on jets originating from boosted Higgs boson decays to W bosons. [...]
CMS-PAS-JME-25-001.- Geneva : CERN, 2025 Figure_001: PDF; Figure_002: 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_006-a: PDF; Figure_006-b: PDF; Figure_007: PDF; Figure_008-a: PDF; Figure_008-b: PDF; Figure_008-c: PDF; Figure_008-d: PDF; Figure_008-e: PDF; Figure_008-f: PDF; Figure_009-a: PDF; Figure_009-b: PDF; Figure_010: PDF; Figure_011-a: PDF; Figure_011-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-07-27
20:29

A search for a heavy resonance decaying to a top quark and a new scalar in the boosted all-hadronic final state at $\sqrt{s}=$ 13 TeV /CMS Collaboration
A search for a heavy resonance decaying to a top quark and a neutral scalar boson

ϕ

$\phi$ in the all-hadronic final state is presented, where the

ϕ

$\phi$ boson candidate is identified by its decay into a bottom quark-antiquark pair. The search is focused on final states in which the decay products of the highly Lorentz-boosted top quark and

ϕ

$\phi$ boson are each expected to be reconstructed as single, large-radius jets with distinct substructures. [...]
CMS-PAS-B2G-22-001.- Geneva : CERN, 2025 Figure_001: PDF; Figure_002: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_003-c: PDF; Figure_003-d: PDF; Figure_004: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_006: PDF; Figure_007: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-07-21
14:00

Measurement of the t-channel single top quark cross section in pp collision data at sqrt(s) = 5.02 TeV /CMS Collaboration
The single top quark

t

$t$ -channel production cross section is measured in proton-proton collisions at

\sqrt{s} = 5.02

$\sqrt{s}=5.02$ TeV using data recorded in 2017, corresponding to an integrated luminosity of

302 {p b}^{- 1}

$302~\mathrm{pb}^{-1}$ . Events with one electron or muon and two or more jets, among which one or more are identified as coming from a b quark, are analyzed. [...]
CMS-PAS-TOP-24-011.- Geneva : CERN, 2025 Figure_001-a: PDF; Figure_001-b: 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; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-07-18
21:08

Search for the pair production of long-lived supersymmetric partners of the tau lepton in proton-proton collisions at sqrt{s}=13 TeV /CMS Collaboration
Gauge-mediated supersymmetry breaking models provide a strong motivation to search for a supersymmetric partner of the tau lepton (stau) with a macroscopic lifetime. Long-lived stau decays produce tau leptons that are displaced from the primary proton-proton interaction vertex, leading to unconventional signatures in the detector. This study presents the first search for the direct production of long-lived staus decaying within the tracker volume in proton-proton collisions at

\sqrt{s} = 13

$\sqrt{s} = 13$ TeV, performed with a dedicated graph network-based identification algorithm for displaced tau leptons. The data sample used, corresponding to an integrated luminosity of 138 fb

^{- 1}

$^{-1}$ , was recorded with the CMS experiment at the CERN LHC between 2016 and 2018. This search excludes at

95 %

$95\%$ confidence level stau masses in the

90 - 290

$90{-}290$ (

90 - 450

$90{-}450$ ) GeV range for

c τ_{0} = 50

$c\tau_{0} = 50$ mm in the maximally mixed (mass degenerate) scenario, while for

m_{~ τ} = 200

$m_{\tilde{\tau}} = 200$ GeV, stau proper lifetimes are excluded in the range

15 - 130

$15{-}130$ (

5 - 390

$5{-}390$ ) mm..
CMS-PAS-EXO-24-020.- Geneva : CERN, 2025 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_003: PDF; Figure_004: PDF; Figure_005-a: PDF; Figure_005-b: 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; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-07-15
11:02

Measurement of the photon-fusion production cross section of a pair of W bosons /CMS Collaboration
A measurement of the cross section of W boson pair production in photon fusion (

γ γ \to W W

$\gamma\gamma\rightarrow\mathrm{WW}$ ) is presented, using an integrated luminosity of

138 {f b}^{- 1}

$138~\mathrm{fb}^{-1}$ of proton-proton collision data collected in 2016-2018 at a center-of-mass energy of

\sqrt{s} = 13 T e V

$\sqrt{s}=13~\mathrm{TeV}$ . Events are selected in the final state with one electron, one muon, and a low multiplicity of tracks associated with the electron-muon production vertex. [...]
CMS-PAS-SMP-24-019.- Geneva : CERN, 2025 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; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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