2024-06-05 21:32 |
დეტალური ჩანაწერი - მსგავსი ჩანაწერები
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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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დეტალური ჩანაწერი - მსგავსი ჩანაწერები
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2024-06-04 15:24 |
დეტალური ჩანაწერი - მსგავსი ჩანაწერები
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2024-06-03 22:51 |
დეტალური ჩანაწერი - მსგავსი ჩანაწერები
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2024-06-03 22:02 |
დეტალური ჩანაწერი - მსგავსი ჩანაწერები
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2024-06-03 20:45 |
დეტალური ჩანაწერი - მსგავსი ჩანაწერები
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2024-06-03 15:43 |
დეტალური ჩანაწერი - მსგავსი ჩანაწერები
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2024-06-02 23:34 |
დეტალური ჩანაწერი - მსგავსი ჩანაწერები
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2024-04-25 10:45 |
დეტალური ჩანაწერი - მსგავსი ჩანაწერები
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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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დეტალური ჩანაწერი - მსგავსი ჩანაწერები
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