First test of lepton flavor universality in the charmed baryon decays Omega(0)(c) -> Omega(-)l(+)nu(l) using data of the Belle experiment

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10456069" target="_blank" >RIV/00216208:11320/22:10456069 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=z3sS8ah.4Z" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=z3sS8ah.4Z</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.105.L091101" target="_blank" >10.1103/PhysRevD.105.L091101</a>

Result language
angličtina
Original language name
First test of lepton flavor universality in the charmed baryon decays Omega(0)(c) -> Omega(-)l(+)nu(l) using data of the Belle experiment
Original language description
We present the first observation of the Omega(0)(c) -> Omega(-)mu(+)nu(mu) decay and present measurements of the branching fraction ratios of the Omega(0)(c) -> Omega(-)l(+)nu(l) decays compared to the reference mode Omega(0)(c) -> Omega(-)pi(+), (l = e or mu). 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 Omega(0)(c) signal yields are extracted by fitting M-Omega l' and M-Omega pi spectra. The branching fraction ratios B(Omega(0)(c) -> Omega(-)e(+)nu(e))/B(Omega(0)(c) -> Omega(-)pi(+)) and B(Omega(0)(c) -> Omega(-)mu(+)nu(mu))/B(Omega(0)(c) -> Omega(-)pi(+)) 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(Omega(0)(c) -> Omega(-)e(+)nu(e))/B(Omega c0 -> Omega(-)mu(+)nu(mu)) is measured to be 1.02 +/- 0.10(stat) +/- 0.02(syst), which is consistent with the expectation of lepton flavor universality.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10300 - Physical sciences

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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