Search for the lepton-flavour violating decays B[subscript (s)][superscript 0] → e[superscript ±]μ[superscript ∓]
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13130_2018_Article_7847.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Alfonso Albero, A.
Ali, S.
Date Issued
March 2018
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
The LHCb collaboration, et al. “Search for the Lepton-Flavour Violating Decays B[subscript (s)][superscript 0] → E[superscript ±]μ[superscript ∓].” Journal of High Energy Physics, vol. 2018, no. 3, Mar. 2018. © 2018 The Authors
Version
Final published version
Abstract
A search for the lepton-flavour violating decays B[subscript s][superscript 0] → e[superscript ±]μ[superscript ∓] and B[superscript 0] → e[superscript ±]μ[superscript ∓] is performed based on a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb[superscript −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[subscript s][superscript 0] → e[superscript ±]μ[superscript ∓] 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(B[superscript 0][subscript s]→e[superscript ±]μ[superscript ∓])<6.3(5.4)×10[superscript −9] and @/@B(B[superscript 0][subscript s]→e[superscript ±]μ[superscript ∓])<7.2(6.0)×10[supercript −9] at 95% (90%) confidence level, respectively. The upper limit on the branching fraction of the B[superscript 0] → e[superscript ±]μ[superscript ∓] decay is also evaluated, obtaining @/@B(B[superscript 0]→e[superscript ±]μ[superscript ∓])<1.3(1.0)×10[superscript −9] at 95% (90%) confidence level. These are the strongest limits on these decays to date. Keywords: B physics, Branching fraction, Flavor physics, Hadron-Hadron scattering (experiments), Rare decay
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
http://dx.doi.org/10.1007/JHEP03(2018)078
