Observation of the B[0 over s] → n[superscript ']n[superscript '] Decay
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PhysRevLett.115.051801.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Affolder, A.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Date Issued
July 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R., et al. "Observation of the B[0 over s] → n[superscript ']n[superscript '] Decay." Phys. Rev. Lett. 115, 051801 (July 2015). © 2015 CERN, for the LHCb Collaboration
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Final published version
Abstract
The first observation of the B[s over 0] → η[superscript ′]η[superscript ′] decay is reported. The study is based on a sample of proton-proton collisions corresponding to 3.0 fb[superscript -1] of integrated luminosity collected with the LHCb detector. The significance of the signal is 6.4 standard deviations. The branching fraction is measured to be [3.31 ± 0.64(stat) ± 0.28(syst) ± 0.12(norm)] × 10[superscript -5], where the third uncertainty comes from the B[superscript ±] → η[superscript ′]K[superscript ±] branching fraction that is used as a normalization. In addition, the charge asymmetries of B[superscript ±] → η[superscript ′]K[superscript ±] and B[superscript ±] → ϕK[superscript ±], which are control channels, are measured to be (-0.2 ± 1.3)% and (+1.7 ± 1.3)%, respectively. All results are consistent with theoretical expectations.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.115.051801
