First test of lepton flavor universality in the charmed baryon decays Ωc0→Ω-ℓ+νℓ using data of the Belle experiment
説明
We present the first observation of the Ωc0→Ω-μ+νμ decay and present measurements of the branching fraction ratios of the Ωc0→Ω-ℓ+νℓ decays compared to the reference mode Ωc0→Ω-π+, (ℓ=e or μ). This analysis is based on 89.5 fb-1, 711 fb-1, and 121.1 fb-1 data samples collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at the center-of-mass energies of 10.52 GeV, 10.58 GeV, and 10.86 GeV, respectively. The Ωc0 signal yields are extracted by fitting MΩℓ and MΩπ spectra. The branching fraction ratios B(Ωc0→Ω-e+νe)/B(Ωc0→Ω-π+) and B(Ωc0→Ω-μ+νμ)/B(Ωc0→Ω-π+) are measured to be 1.98±0.13(stat)±0.08(syst) and 1.94±0.18(stat)±0.10(syst), respectively. The ratio of B(Ωc0→Ω-e+νe)/B(Ωc0→Ω-μ+νμ) is measured to be 1.02±0.10(stat)±0.02(syst), which is consistent with the expectation of lepton flavor universality.
Physical review / D 105(9), L091101 (2022). doi:10.1103/PhysRevD.105.L091101
Published by Inst., Woodbury, NY
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キーワード
- Omega-
- Physics
- ddc:530
- branching ratio: ratio: measured
- Omega/c0 --> Omega- positron neutrino/e
- Omega/c0: semileptonic decay
- BELLE
- electron positron: colliding beams
- electron positron: annihilation
- 530
- lepton: flavor
- KEK-B
- flavor: universality
- Omega/c0: electroproduction
- charmed baryon: decay
- Omega/c0 --> Omega- muon+ neutrino/mu
- info:eu-repo/classification/ddc/530
- Omega/c0: branching ratio
- experimental results
詳細情報 詳細情報について
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- CRID
- 1873679867491032576
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- HANDLE
- 11588/938565
- 11568/1216679
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- 本文言語コード
- en
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- データソース種別
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- OpenAIRE