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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/185395
Search for the lepton-flavour violating decays B (s) 0 → e ± μ ∓
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A search for the lepton-flavour violating decays B0 s → 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 B0 s → 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(B0 s → e ±µ ∓) < 6.3 (5.4) × 10−9 and B(B0 s → 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
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ALFONSO ALBERO, Alejandro, et al. Search for the lepton-flavour violating decays B (s) 0 → e ± μ ∓. Journal of High Energy Physics. 2018. Vol. 2018, num. 3, pags. 1-20. ISSN 1126-6708. [consulted: 13 of August of 2026]. Available at: https://hdl.handle.net/2445/185395