Search for the lepton-flavour violating decays B0(s)→ e±μ∓

Авторы: Бережной А.В., Горелов И.В., Лефлат А.К., Никитин Н.В., Саврина Д.В., Волков В.Ю., Жуков В.Ю., LHCb Collaboration
Журнал: Journal of High Energy Physics
Том: 2018
Номер: 3
Год издания: 2018
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
DOI: 10.1007/jhep03(2018)078
Аннотация: A search for the lepton-flavour violating decays B0s → e±μ∓ and B0 → e±μ∓ is performed based on a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yields are consistent with the background-only hypothesis. Upper limits on the branching fraction of the B0s → e±μ∓ decays are evaluated both in the hypotheses of an amplitude completely dominated by the heavy eigenstate and by the light eigenstate. The results are @@B(B0s→e±μ∓)<6.3(5.4)×10−9 and @@B(B0s→e±μ∓)<7.2(6.0)×10−9 at 95% (90%) confidence level, respectively. The upper limit on the branching fraction of the B0 → e±μ∓ decay is also evaluated, obtaining @@B(B0→e±μ∓)<1.3(1.0)×10−9 at 95% (90%) confidence level. These are the strongest limits on these decays to date.
Добавил в систему: Бережной Александр Викторович

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