CMS Physics Analysis Summaries

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2025-05-26
20:27

Search for single production of vector-like quarks decaying into a W boson and a b quark using the single-lepton final states in proton-proton collisions at 13 TeV /CMS Collaboration
A search is performed for single production of a heavy vector-like quark, decaying into a W boson and a bottom (b) quark. The analysis is based on proton-proton collision data collected by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosty of 138 fb

$^{-1}$ . [...]
CMS-PAS-B2G-22-004.- Geneva : CERN, 2025 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_003-d: PDF; Figure_003-e: PDF; Figure_003-f: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Rekord szczegółowy

2025-05-25
11:31

Observation of $4\ell\gamma$ and evidence of $\mathrm ZZ\gamma$ production in proton-proton collisions at $\sqrt{s}$ = 13 TeV /CMS Collaboration
The first measurement of the production cross section of four charged leptons and a photon in proton-proton collisions is presented. The analysis utilises data collected by the CMS experiment from 2016 to 2018 at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 138 fb

$^{-1}$ . The observed (expected) significance for the observation of

$\mathrm{pp} \rightarrow 4\ell \gamma$ in a phase space with

$p_\mathrm{T}^\gamma > 20~\mathrm{GeV}$ ,

$|\eta^\gamma| < 2.4$ and

$\Delta R(\ell,\gamma) > 0.5$ is 5.1 (4.1) standard deviations. The measured and expected fiducial cross sections are

$\left(0.16 \pm 0.06 \right)~\mathrm{fb}$ and

$\left(0.10 \pm 0.03 \right)~\mathrm{fb}$ respectively. The

$4\ell\gamma$ events, with the additional requirement that the invariant mass of any of the two lepton pairs and the photon is greater than

$100~\mathrm{GeV}$ , are also used to search for the production of the triboson process,

$\mathrm{pp} \rightarrow \mathrm{ZZ}\gamma$ , with fully leptonic decays of the Z bosons, leading to the first evidence for this process, with an observed (expected) significance of 3.7 (3.0) standard deviations. The measured and expected fiducial cross sections for

$\mathrm{pp} \rightarrow \mathrm{ZZ}\gamma \rightarrow 4\ell \gamma$ are

$\left(0.06 \pm 0.03 \right)$ fb and

$\left(0.04 \pm 0.02 \right)$ fb, respectively. Both results are in agreement with the standard model prediction within one standard deviation..
CMS-PAS-SMP-24-014.- 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; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-05-21
22:03

First fully exclusive reconstruction of radiative decays of the $\mathrm{B}^{*+}$ , $\mathrm{B}^{*0}$ , and $\mathrm{B}^{*0}_\mathrm{s}$ mesons and measurement of their masses in proton-proton collisions at $\sqrt{s} = 13\,\text{TeV}$ /CMS Collaboration
Using a data sample corresponding to an integrated luminosity of

$140\,\text{fb}^{-1}$ of proton-proton collisions collected by the CMS experiment at

$\sqrt{s}= 13\,\text{TeV}$ in 2016--2018, the first full reconstruction of the three vector B meson states,

$\mathrm{B}^{*+}$ ,

$\mathrm{B}^{*0}$ , and

$\mathrm{B}^{*0}_\mathrm{s}$ , is performed. The mass differences between the excited mesons and their corresponding ground states are measured to be

$m(\mathrm{B}^{*+})-m(\mathrm{B}^{+}) = 45.277\pm0.039\pm0.021\,\text{MeV}$ ,

$m(\mathrm{B}^{*0})-m(\mathrm{B}^{0}) = 45.471\pm0.056\pm0.024\,\text{MeV}$ , and

$m(\mathrm{B}^{*0}_\mathrm{s})-m(\mathrm{B}^{0}_\mathrm{s}) = 49.407\pm0.132\pm0.034\,\text{MeV}$ , where the first uncertainty is statistical and the second is systematic. [...]
CMS-PAS-BPH-24-011.- Geneva : CERN, 2025 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_A001-d: PDF; Figure_A001-e: PDF; Figure_A001-f: PDF; Figure_A001-g: PDF; Figure_C001-h: PDF; Figure_C001-i: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Rekord szczegółowy

2025-05-21
11:48

Observation and differential measurement of electroweak production of one photon and two jets in proton-proton collisions at 13 TeV /CMS Collaboration
The first observation of electroweak production of a photon in association with two forward jets in proton-proton collisions is presented. The measurement uses data recorded by the CMS experiment at the LHC during 2016--2018 at a center--of--mass energy of

$13~\mathrm{TeV}$ , corresponding to an integrated luminosity of

$138~\mathrm{fb}^{-1}$ . [...]
CMS-PAS-SMP-19-005.- Geneva : CERN, 2025 Figure_001: 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-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_006: PDF; Figure_007: PDF; Figure_008: 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; Figure_011-a: PDF; Figure_011-b: PDF; Figure_011-c: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Rekord szczegółowy

2025-05-21
10:09

Search for heavy H $\gamma$ and Z $\gamma$ resonances with a b quark pair final state in proton-proton collisions at sqrt(s) = 13 TeV /CMS Collaboration
A search for heavy resonances decaying into a H or Z boson and a photon, with the H and Z bosons decaying to a pair of bottom quarks (b

$\bar{\text{b}}$ ) is presented. The analysis is performed in proton-proton collision data at

$\sqrt{s}=13~\mathrm{TeV}$ collected by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of

$138~\mathrm{fb}^{-1}$ . [...]
CMS-PAS-B2G-24-007.- 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_006-c: PDF; Figure_006-d: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_007-c: PDF; Figure_007-d: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Rekord szczegółowy

2025-05-20
09:33

Search for supersymmetry in hadronic and leptonic final states with highly Lorentz-boosted objects at sqrt(s) = 13 TeV /CMS Collaboration
A search for supersymmetry in final states with highly Lorentz-boosted top quarks,

$\mathrm{W}$ ,

$\mathrm{Z}$ , Higgs bosons, or leptonic jets is presented. The search is based on proton-proton collision data at a center-of-mass energy of

$\sqrt{s}=13~\mathrm{TeV}$ , collected by the CMS experiment at CERN LHC during 2016, 2017, and 2018, corresponding to an integrated luminosity of

$138~\mathrm{fb}^{-1}$ . [...]
CMS-PAS-SUS-23-014.- Geneva : CERN, 2025 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; Figure_003-c: PDF; Figure_003-d: PDF; Figure_003-e: PDF; Figure_003-f: PDF; Figure_003-g: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_004-c: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_006: 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-a: PDF; Figure_008-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Rekord szczegółowy

2025-05-19
17:11

Search for light pseudoscalar a bosons in $\mathrm{H\to a a \to 4 e}$ decays in pp collisions at $\sqrt{s}$ = 13 TeV /CMS Collaboration
% A search for pairs of neutral resonances resulting from the decay of a Higgs boson is performed, using proton-proton collision data at

$\sqrt{s} = 13~\mathrm{TeV}$ , corresponding to an integrated luminosity of

$138~\mathrm{fb}^{-1}$ . The search is conducted for sub-GeV mass resonances which decay into electron-positron pairs. [...]
CMS-PAS-EXO-24-031.- 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: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Rekord szczegółowy

2025-05-18
10:54

Search for Higgs boson production at high transverse momentum in the WW* decay channel in proton-proton collisions at $\sqrt{s}$ = 13 TeV /CMS Collaboration
A search for Higgs boson production at high transverse momentum in the

$\mathrm{WW^{*}}$ decay channel is presented. The analysis uses proton-proton collision data collected with the CMS detector at

$\sqrt{s} = 13~\mathrm{TeV}$ during the years 2016--2018, corresponding to an integrated luminosity of

$138~\mathrm{fb}^{-1}$ . [...]
CMS-PAS-HIG-24-008.- Geneva : CERN, 2025 Figure_001: PNG; Figure_002-a: PDF; Figure_002-b: 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: 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: PDF; Figure_008: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Rekord szczegółowy

2025-05-17
15:32

Search for single production of a vector-like T quark decaying to a top quark and a neutral scalar boson in lepton+jets final states at sqrt(s) = 13 TeV /CMS Collaboration
A search for single production of a vector-like T quark with charge

$2/3\,e$ , in the decay channel with a top quark and a neutral scalar boson

$\phi$ is presented. The

$\phi$ boson can be a standard model Higgs boson or a new particle beyond the standard model. [...]
CMS-PAS-B2G-23-009.- Geneva : CERN, 2025 Figure_001: 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-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_005-d: PDF; Figure_006: 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_008-c: PDF; Figure_008-d: PDF; Figure_008-e: PDF; Figure_009: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Rekord szczegółowy

2025-05-16
11:28

Observation of tWZ production at the CMS experiment /CMS Collaboration
The first observation is reported of single top quark production in association with a W and a Z boson in proton-proton collisions. The analysis uses data at center-of-mass energies of 13 and 13.6 TeV recorded with the CMS detector at the CERN LHC, corresponding to a total integrated luminosity of 200 fb

$^{-1}$ . [...]
CMS-PAS-TOP-24-009.- 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_003-c: PDF; Figure_004: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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