Skip to main content

Search for B→K(*) vv̄ and invisible quarkonium decays

Citations of this article
Mendeley users who have this article in their library.
Get full text
This PDF is freely available from an open access repository. It may not have been peer-reviewed.


We search for the flavor-changing neutral-current decays B→K(*) νν̄, and the invisible decays J/ψ→νν̄ and ψ(2S)→νν̄ via B→K(*) J/ψ and B→K(*) ψ(2S), respectively, using a data sample of 471×106 BB̄ pairs collected by the BABAR experiment. We fully reconstruct the hadronic decay of one of the B mesons in the Υ(4S)→BB̄ decay, and search for the B→K(*) νν̄ decay in the rest of the event. We observe no significant excess of signal decays over background and report branching fraction upper limits of B(B+→K +νν̄)<3.7×10-5, B(B0→K0νν ̄)<8.1×10-5, B(B+→K *+νν̄)<11.6×10-5, B(B0→K*0νν̄)<9.3×10-5, and combined upper limits of B(B→Kνν̄)<3.2×10-5 and B(B→K*νν̄)<7.9×10-5, all at the 90% confidence level. For the invisible quarkonium decays, we report branching fraction upper limits of B(J/ψ→νν̄)<3. 9×10-3 and B(ψ(2S)→νν̄)<15. 5×10-3 at the 90% confidence level. Using the improved kinematic resolution achieved from hadronic reconstruction, we also provide partial branching fraction limits for the B→K(* νν̄ decays over the full kinematic spectrum. © 2013 American Physical Society.




Lees, J. P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., … Wu, S. L. (2013). Search for B→K(*) vv̄ and invisible quarkonium decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 87(11).

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free