Measurement of the B 0 → K ∗0 e + e − branching fraction at low dilepton mass
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Author(s)
Williams, M.
Date Issued
May 2013
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Aaij, R., C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. “Measurement of the B 0 → K ∗0 e + e − Branching Fraction at Low Dilepton Mass.” J. High Energ. Phys. 2013, no. 5 (May 2013). doi:10.1007/jhep05(2013)159.
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Final published version
Abstract
The branching fraction of the rare decay B[superscript 0] --> K[superscript ∗0] e + e − in the dilepton mass region from 30 to 1000 MeV/c[superscript 2] has been measured by the LHCb experiment, using pp collision data, corresponding to an integrated luminosity of 1.0 fb[superscript −1], at a centre-of-mass energy of 7 TeV. The decay mode B[superscript 0] --> J/ψ (e + e −)K[superscript ∗0] is utilized as a normalization channel. The branching fraction B(B[superscript 0] -->K[superscript ∗0]e+e−) is measured to be B(B[superscript 0]-->K[superscript ∗0]e+e−)[superscript 30−1000MeV/c2]=(3.1+0.9−0.8+0.2−0.3±0.2)×10[superscript −7], where the first error is statistical, the second is systematic, and the third comes from the uncertainties on the B[superscript 0] --> J/ψ K [superscript ∗0] and J/ψ --> e + e − branching fractions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP05(2013)159
