In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2018, No. 3 ( 2018-03)
Abstract:
A search for the lepton-flavour violating decays B s 0 → e ± μ ∓ and B 0 → 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 B s 0 → 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 $$ \frac{@}{@}\mathrm{\mathcal{B}}\left({B}_s^0\to {e}^{\pm }{\mu}^{\mp}\right)〈6.3(5.4)\times 1{0}^{-9} $$ @ @ ℬ B s 0 → e ± μ ∓ 〈 6.3 5.4 × 1 0 − 9 and $$ \frac{@}{@}\mathrm{\mathcal{B}}\left({B}_s^0\to {e}^{\pm }{\mu}^{\mp}\right)〈7.2(6.0)\times 1{0}^{-9} $$ @ @ ℬ B s 0 → e ± μ ∓ 〈 7.2 6.0 × 1 0 − 9 at 95% (90%) confidence level, respectively. The upper limit on the branching fraction of the B 0 → e ± μ ∓ decay is also evaluated, obtaining $$ \frac{@}{@}\mathrm{\mathcal{B}}\left({B}^0\to {e}^{\pm }{\mu}^{\mp}\right)〈1.3(1.0)\times 1{0}^{-9} $$ @ @ ℬ B 0 → e ± μ ∓ 〈 1.3 1.0 × 1 0 − 9 at 95% (90%) confidence level. These are the strongest limits on these decays to date.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP03(2018)078
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2018
detail.hit.zdb_id:
2027350-2
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