Test of lepton flavor universality with 𝐵+ → 𝐾+ 𝜋+ 𝜋− ℓ+ ℓ− decays
The first test of lepton flavor universality between muons and electrons using 𝐵+→𝐾+𝜋+𝜋−ℓ+ℓ− (ℓ =𝑒, 𝜇) decays is presented. The measurement is performed with data from proton-proton collisions collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an in...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
9 May, 2025
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| In: |
Physical review letters
Year: 2025, Jahrgang: 134, Heft: 18, Pages: 1-13 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.134.181803 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.134.181803 Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.134.181803 
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| Verfasserangaben: | R. Aaij et al.* (LHCb Collaboration) |
MARC
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| 245 | 1 | 0 | |a Test of lepton flavor universality with + → + + − ℓ+ ℓ− decays |c R. Aaij et al.* (LHCb Collaboration) |
| 246 | 3 | 3 | |a Test of lepton flavor universality with + → + + − ℓ + ℓ − decays |
| 246 | 3 | 3 | |a Test of lepton flavor universality with plus → plus pi plus pi minuis ℓ plus ℓ minus decays |
| 264 | 1 | |c 9 May, 2025 | |
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| 500 | |a Im Text ist "+" und "-" jeweils hochgestellt | ||
| 500 | |a LHCb Collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascón, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S.R. Roy, M. Ruiz Diaz, M. Schiller, M.D. Tat, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und viele weitere] | ||
| 500 | |a Gesehen am 11.02.2026 | ||
| 520 | |a The first test of lepton flavor universality between muons and electrons using +→++−ℓ+ℓ− (ℓ =, ) decays is presented. The measurement is performed with data from proton-proton collisions collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The ratio of branching fractions between +→++−+− and +→++−+− decays is measured in the dilepton invariant-mass-squared range 1.1<2<7.0 GeV2/4 and is found to be −1=1.31+0.18−0.17(stat) +0.12−0.09(syst), in agreement with the standard model prediction. The first observation of the + →++−+− decay is also reported. | ||
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