In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2013, No. 5 ( 2013-05)
Abstract:
The branching fraction of the rare decay B 0 → K ∗0 e + e − in the dilepton mass region from 30 to 1000 MeV /c 2 has been measured by the LHCb experiment, using pp collision data, corresponding to an integrated luminosity of 1.0 fb −1 , at a centre-of-mass energy of 7 TeV. The decay mode B 0 → J/ψ ( e + e − ) K ∗0 is utilized as a normalization channel. The branching fraction $ \mathcal{B}\left( {{B^0}\to {K^{*0 }}{e^{+}}{e^{-}}} \right) $ is measured to be $ \mathcal{B}{{\left( {{B^0}\to {K^{*0 }}{e^{+}}{e^{-}}} \right)}^{{30-1000\,{{\mathrm{MeV}} \left/ {{{c^2}}} \right.}}}}=\left( {3.1_{-0.8}^{+0.9 }{\,}_{-0.3}^{+0.2}\pm 0.2} \right)\times {10^{-7 }}, $ where the first error is statistical, the second is systematic, and the third comes from the uncertainties on the B 0 → J/ ψ K ∗0 and J/ ψ → e + e − branching fractions.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP05(2013)159
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2013
detail.hit.zdb_id:
2027350-2
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