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CMS Physics Analysis Summaries

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2024-06-05
21:32
Search for top squarks in final states with many light flavor jets and 0, 1, or 2 leptons in proton-proton collisions at sqrt(s) = 13 TeV /CMS Collaboration
Several new physics models including versions of supersymmetry (SUSY) characterized by $R$-parity violation (RPV) or with additional hidden sectors predict the production of events with top quarks, low missing transverse momentum, and many additional quarks or gluons. The results of a search for top squarks decaying to two top quarks and six additional light-flavor quarks or gluons are reported. [...]
CMS-PAS-SUS-23-001.- Geneva : CERN, 2024 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_003: 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_005-e: PDF; Figure_005-f: 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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2024-06-05
00:08
Search for excited tau leptons in the $\tau\tau\gamma$ final state in pp collisions at $\sqrt{s}=13\,\mathrm{TeV}$ /CMS Collaboration
We report the results of a test of the compositeness of the heaviest charged lepton, $\tau$, using data collected in proton-proton collisions at a center of mass energy of 13 TeV at the Large Hadron Collider at CERN in 2016-2018, corresponding to an integrated luminosity of $138\,\mathrm{fb}^{-1}$. We seek tau lepton pair production in which one tau lepton is produced in an excited state and decays to a ground state tau lepton and photon. The analysis selects events with two isolated tau lepton decay candidates plus a high energy photon. The mass of the excited tau lepton is reconstructed using the missing transverse momentum in the event, assuming the momentum of the neutrinos from each tau lepton decay lie along the visible tau lepton decay product direction. We observe no excess of events above the standard model background prediction and use this null result to set lower bounds on the excited tau lepton mass. For a compositeness scale $\Lambda$ equal to the excited tau lepton mass (10 TeV), we exclude excited tau leptons with masses below 4700 GeV (2800 GeV)..
CMS-PAS-EXO-22-007.- Geneva : CERN, 2024 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_003-c: PDF; Figure_004: PDF; Figure_005: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2024-06-04
15:24
Search for a neutral gauge boson with non-universal fermion couplings in vector boson fusion processes in proton-proton collisions at $\sqrt{s}=$ 13$~\mathrm{TeV}$ /CMS Collaboration
The first search for a heavy neutral spin-1 gauge boson ($\mathrm{Z'}$) produced via vector boson fusion processes is presented. The analysis considers scenarios in which the $\mathrm{Z'}$ boson has non-universal fermion couplings, favoring higher-generation fermions. [...]
CMS-PAS-EXO-21-015.- Geneva : CERN, 2024 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; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2024-06-03
22:51
Measurement of event shapes in minimum bias events from $\mathrm{p}\mathrm{p}$ collisions at $13~\mathrm{TeV}$ /CMS Collaboration
This note presents a measurement of event-shape variables using a data sample of low-pileup inelastic proton-proton collisions collected by the CMS detector at a centre-of-mass energy of $13~\mathrm{TeV}$, corresponding to an integrated luminosity of $64~\mu\text{b}^{-1}$. A number of observables related to the overall distribution of charged particles in the collisions is corrected for detector effects and compared to simulations. [...]
CMS-PAS-SMP-23-008.- Geneva : CERN, 2024 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_003-a: PDF; Figure_003-b: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_A001-a: PDF; Figure_A001-b: PDF; Figure_A002-a: PDF; Figure_A002-b: PDF; Figure_A003: PDF; Figure_A004-a: PDF; Figure_A004-b: PDF; Figure_A004-c: PDF; Figure_A004-d: PDF; Figure_A005-a: PDF; Figure_A005-b: PDF; Figure_A005-c: PDF; Figure_A005-d: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2024-06-03
22:02
Angular analysis of the $B^0 \to K^{*0}(892) \mu^+ \mu^-$ decay at $\sqrt{s}$ = 13 TeV /CMS Collaboration
The full set of optimised CP-averaged observables is measured in the angular analysis of the decay ${\mathrm{B}^0} \to \mathrm{K^{\ast 0}(892)} \mu^+\mu^-$ using a sample of proton-proton collisions at $\sqrt{s}=13$ TeV collected with the CMS detector at the LHC, corresponding to an integrated luminosity of ${140}~\mathrm{fb^{-1}}$. The analysis is performed in bins of the invariant mass squared of the dimuon system. [...]
CMS-PAS-BPH-21-002.- Geneva : CERN, 2024 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_003-g: PDF; Figure_003-h: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2024-06-03
20:45
Search for heavy neutral resonances decaying to $\tau$ lepton pairs in $\mathrm{pp}$ collisions at $\sqrt{s}=13~\mathrm{TeV}$ /CMS Collaboration
A search for heavy neutral gauge bosons ($\mathrm{Z}'$) decaying to two tau leptons is performed in proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$ at the CERN LHC. The data were collected with the CMS detector and correspond to an integrated luminosity of $138~\mathrm{fb}^{-1}$. [...]
CMS-PAS-EXO-21-016.- Geneva : CERN, 2024 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_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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2024-06-03
15:43
Dependence of two-particle azimuthal correlations on the forward rapidity gap width in pPb collisions at $\sqrt{s_{NN}}=8.16~\mathrm{TeV}$ /CMS Collaboration
Measurements of the Fourier coefficients ($V_{n\Delta}$) of the azimuthal distributions of charged hadron pairs produced in pPb collisions at 8.16 TeV are presented as functions of the forward rapidity gap width ($\Delta\eta^{\rm{F}} $) for events in which particle production is concentrated in the direction of the outgoing Pb beam. The sample includes contributions from pomeron and photon induced processes as well as nondiffractive events. [...]
CMS-PAS-HIN-22-004.- Geneva : CERN, 2024 Figure_001-a: PDF; Figure_001-b: 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; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2024-06-02
23:34
Azimuthal dependence of hyperon polarization along the beam direction in pPb collisions at $\sqrt{s_{_{NN}}}$ = 8.16 TeV /CMS Collaboration
The polarization of the $\Lambda$ and $\overline{\Lambda}$ hyperons along the beam ($z$) direction, $P_z$, has been measured for the first time in pPb collisions at the LHC with $\sqrt{s_{_{NN}}}$ = 8.16 TeV data collected by the CMS experiment. Assuming the largest contributions to $P_z$ come from collective flow, this polarization can be characterized by the Fourier sine coefficients $P_{z,sn} = \langle P_{z}\sin(n\phi - n\Psi_{n}) \rangle$, where $\phi$ is the hyperon azimuthal emission angle and $\Psi_{n}$ is the $n$-th order flow plane angle. [...]
CMS-PAS-HIN-24-002.- Geneva : CERN, 2024 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002: 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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2024-04-25
10:45
Measurement of azimuthal correlations among jets and determination of the strong coupling in pp collisions at $\sqrt{s}=13~\mathrm{TeV}$ /CMS Collaboration
A measurement is presented of the ratio observable $R_{\Delta\phi}(p_\mathrm{T})$ that provides a measure of the azimuthal correlations among jets with large transverse momentum $p_\mathrm{T}$. The $R_{\Delta\phi}(p_\mathrm{T})$ variable is defined as the ratio of the number of neighbouring jets in events with a 3-jet topology, enforced through an azimuthal angular separation of $2\pi/3<\Delta\phi<7\pi/8$, over the number of inclusive jets within the same jet $p_\mathrm{T}$ bin. [...]
CMS-PAS-SMP-22-005.- Geneva : CERN, 2023 Figure_001: PDF; Figure_002: PNG; Figure_003: PDF; Figure_004: PDF; Figure_005: PDF; Figure_006: PDF; Figure_007: PDF; Figure_008: PDF; Figure_009: PDF; Figure_010: PDF; Figure_011: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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2024-04-25
10:10
Measurements of the light-by-light scattering and the Breit--Wheeler processes, and searches for axion-like particles in ultraperipheral PbPb collisions at $\sqrt{s_\mathrm{NN}} = 5.02~\mathrm{TeV}$ /CMS Collaboration
Measurements of the light-by-light scattering (LbL, $\gamma\gamma\to\gamma\gamma$) and the Breit--Wheeler (B--W, $\gamma\gamma\to\mathrm{e}^+\mathrm{e}^-$) processes are reported in ultraperipheral PbPb collisions at a centre-of-mass energy per nucleon pair of 5.02 TeV using a data sample corresponding to an integrated luminosity of $1.65~\mathrm{nb}^{-1}$. Events with a pair of exclusively produced photons or $\mathrm{e}^+\mathrm{e}^-$ are selected, each with transverse energy $E_\mathrm{T}^{\gamma,\mathrm{e}}>2~\mathrm{GeV}$, pseudorapidity $|\eta^{\gamma,\mathrm{e}}|<2.2$, pair invariant mass $m^{\gamma\gamma,\mathrm{ee}}> 5~\mathrm{GeV}$, pair transverse momentum $p_\mathrm{T}^{\gamma\gamma,\mathrm{ee}}<1~\mathrm{GeV}$, and pair azimuthal acoplanarity $A_\phi<0.01$. [...]
CMS-PAS-HIN-21-015.- Geneva : CERN, 2024 Figure_001: 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_003: 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_006-c: PDF; Figure_006-d: PDF; Figure_006-e: PDF; Figure_006-f: PDF; Figure_006-g: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_008: PDF; Figure_009: PDF; Fulltext in PDF: PDF; External link: Additional information for the analysis (restricted access)

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