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CMS Physics Analysis Summaries

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2025-05-08
09:34
DeepMET: Improving missing transverse momentum estimation with a deep neural network /CMS Collaboration
At hadron colliders, the net transverse momentum of particles that do not interact with the detector (missing transverse momentum) is a crucial observable in many analyses. In the standard model, missing transverse momentum originates from neutrinos. [...]
CMS-PAS-JME-24-001.- Geneva : CERN, 2025 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-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_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; Figure_011-d: PDF; Figure_012-a: PDF; Figure_012-b: PDF; Figure_012-c: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-05-06
22:09
First measurement of coherent photoproduction of Y(1S) mesons in lead-lead ultraperipheral collisions at √sNN = 5.02 TeV /CMS Collaboration
Coherent photoproduction of heavy-flavor vector mesons in ultrarelativistic heavy ion collisions (UPCs) provides a direct probe of the gluonic structure of nuclei. This note presents the first measurement of coherent photoproduction of Υ(1S) off heavy nuclei. [...]
CMS-PAS-HIN-24-013.- 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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2025-05-05
05:24
Search for a low mass resonance decaying to ττ using data collected with a dedicated high-rate data stream /CMS Collaboration
An inclusive search for a low-mass resonance decaying to two τ leptons is presented, probing the mass range from 20 to 60 GeV for the first time at a hadron collider. The search uses proton-proton collision data at √s=13.6 TeV corresponding to an integrated luminosity of 61.9 fb−1 collected by the CMS experiment in 2022 and 2023. [...]
CMS-PAS-EXO-24-012.- Geneva : CERN, 2025 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_003: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-05-02
17:37
Identification of tau leptons using a convolutional neural network with domain adaptation in the CMS experiment /CMS Collaboration
The DeepTau identification algorithm, based on deep neural network techniques, has been developed to reduce the fraction of jets, muons, and electrons misidentified as hadronically decaying tau leptons (τh) in the CMS experiment. The latest version of this algorithm includes domain adaptation by backpropagation, a technique that reduces data-to-simulation discrepancies in the region with the highest purity of genuine τh candidates. [...]
CMS-PAS-TAU-24-001.- Geneva : CERN, 2025 Figure_001: PDF; Figure_002: PNG; Figure_003: 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-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-a: PDF; Figure_012-b: PDF; Figure_013-a: PDF; Figure_013-b: PDF; Figure_014: 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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2025-05-01
12:48
Probing thermodynamic properties of proton-lead collision systems via multiplicity dependence of average transverse momentum at the LHC /CMS Collaboration
The possible formation of hot, strongly interacting matter in small collision systems has generated significant interest. In this study, the correlation between the average transverse momentum (⟨pT⟩) and charged-particle multiplicity (Nch) is analyzed in proton-lead (pPb) collisions at the CERN LHC to explore the system's thermodynamic properties. [...]
CMS-PAS-HIN-25-001.- Geneva : CERN, 2025 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-04-30
18:12
Search for dark matter produced in association with a Higgs boson decaying to bottom quarks in proton-proton collisions at 13 TeV /CMS Collaboration
A search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks is presented using data collected with the CMS detector in 2017 and 2018 at √s=13 TeV, corresponding to an integrated luminosity of 101.3 fb−1. The analysis is performed in exclusive channels targeting both boosted and resolved b quark pair topologies, covering a wide range of Higgs boson transverse momentum. [...]
CMS-PAS-SUS-24-007.- Geneva : CERN, 2025 Figure_001: PNG; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PNG; Figure_003-b: PNG; Figure_003-c: PNG; Figure_003-d: PNG; Figure_004: PNG; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-04-28
16:08
Search for new physics with compressed mass spectra in final states with soft leptons and missing transverse energy in proton-proton collisions at √s=13 TeV /CMS Collaboration
A search for supersymmetric scenarios leading to compressed mass spectra is presented, using events with at least two low-pT electrons or muons and missing transverse energy, in proton-proton collisions at √s=13 TeV. This analysis is based on data collected with the CMS detector at the CERN LHC and corresponds to a total integrated luminosity of up to 139 fb−1. [...]
CMS-PAS-EXO-23-017.- 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_003-d: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_004-c: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_006-c: PDF; Figure_007: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

Detailed record
2025-04-27
21:53
Unveiling the dynamics of long-range correlations in high-multiplicity jets through substructure engineering in pp collisions at √s=13 TeV /CMS Collaboration
Recent CMS data have revealed long-range correlations at high charged-particle multiplicity (Njch) within jets produced in proton-proton (pp) collisions, suggesting collective behavior in systems much smaller than those typical of heavy ion collisions. In the polar coordinate system about the reconstructed jet axis, two-particle azimuthal correlations show an unexpected rise in elliptic anisotropy (v∗2) at large pseudorapidity separations (Δη∗>2) as a function of Njch, a trend not reproduced by event generators like \textsc{pythia} or \textsc{sherpa}. In this paper, we present detailed measurements of long-range correlations using LHC Run 2 data at √s=13 TeV and compare the results with model predictions. [...]
CMS-PAS-HIN-24-024.- Geneva : CERN, 2025 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003: PDF; Figure_004: PDF; Figure_005: PDF; Figure_006: PDF; Figure_007: PDF; Figure_008-a: PDF; Figure_008-b: PDF; Figure_008-c: PDF; Figure_008-d: PDF; Figure_009: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-04-27
10:21
Study of χc production in pPb collisions at √sNN=8.16TeV with the CMS experiment /CMS Collaboration
The production of prompt P-wave charmonium states χc1(1P) and χc2(2P) is studied in proton-lead (pPb) collisions at a center-of-mass energy per nucleon pair of √sNN=8.16Te\hspace{-.08em}V. The analysis is based on data with an integrated luminosity of 175nb−1 that were collected by CMS at the LHC. [...]
CMS-PAS-HIN-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: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2025-04-24
23:27
Constraining low-x gluon densities with low-pT D0 meson production in ultraperipheral lead-lead collisions at 5.36 TeV /CMS Collaboration
This analysis presents a rapidity-differential measurement of low transverse momentum (pT) D0 meson production in ultraperipheral lead-lead collisions at √sNN=5.36 TeV. The study is performed in the D0 meson pT range of 2<pT<5 GeV and in intervals of D0 meson rapidity −2<y<2. [...]
CMS-PAS-HIN-25-002.- Geneva : CERN, 2025 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_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: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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