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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/133324
Search for the Lepton-Flavor-Violating Decays Bs0→e±μ∓ and B0→e±μ∓
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A search for the lepton-flavor-violating decays B 0 s → e ± μ ∓ and B 0 → e ± μ ∓ is performed with a data sample, corresponding to an integrated luminosity of 1.0 fb − 1 of p p collisions at √ s = 7 TeV , collected by the LHCb experiment. The observed number of B 0 s → e ± μ ∓ and B 0 → e ± μ ∓ candidates is consistent with background expectations. Upper limits on the branching fractions of both decays are determined to be B ( B 0 s → e ± μ ∓ ) < 1.1 ( 1.4 ) × 10 − 8 and B ( B 0 → e ± μ ∓ ) < 2.8 ( 3.7 ) × 10 − 9 at 90% (95%) confidence level (C.L.). These limits are a factor of 20 lower than those set by previous experiments. Lower bounds on the Pati-Salam leptoquark masses are also calculated, M LQ ( B 0 s → e ± μ ∓ ) > 101 TeV / c 2 and M LQ ( B 0 → e ± μ ∓ ) > 126 TeV / c 2 at 95% C.L., and are a factor of 2 higher than the previous bounds.
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CALVO GÓMEZ, Míriam, et al. Search for the Lepton-Flavor-Violating Decays Bs0→e±μ∓ and B0→e±μ∓. Physical Review Letters. 2013. Vol. 111, num. 14, pags. 141801. ISSN 0031-9007. [consulted: 27 of August of 2026]. Available at: https://hdl.handle.net/2445/133324