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Search for B→K(*)νν and invisible quarkonium decays
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BaBar Collaboration (Including: Gershon, T. J., Harrison, P. F. and Latham, Thomas). (2013) Search for B→K(*)νν and invisible quarkonium decays. Physical Review D (Particles, Fields, Gravitation and Cosmology), Volume 87 (Number 11). Article number 112005 . doi:doi: 10.5606/tgkdc.dergisi.2013.6683 ISSN 1550-7998.
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Official URL: http://dx.doi.org/10.1103/PhysRevD.87.112005
Abstract
We search for the flavor-changing neutral-current decays B→K(*)νν̅ , and the invisible decays J/ψ→νν̅ and ψ(2S)→νν̅ via B→K(*)J/ψ and B→K(*)ψ(2S), respectively, using a data sample of 471×106 BB̅ pairs collected by the BABAR experiment. We fully reconstruct the hadronic decay of one of the B mesons in the Υ(4S)→BB̅ decay, and search for the B→K(*)νν̅ 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+νν̅ )<3.7×10-5, B(B0→K0νν̅ )<8.1×10-5, B(B+→K*+νν̅ )<11.6×10-5, B(B0→K*0νν̅ )<9.3×10-5, and combined upper limits of B(B→Kνν̅ )<3.2×10-5 and B(B→K*νν̅ )<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→νν̅ )<3.9×10-3 and B(ψ(2S)→νν̅ )<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(*)νν̅ decays over the full kinematic spectrum.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1550-7998 | ||||
| Official Date: | 2013 | ||||
| Dates: |
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| Volume: | Volume 87 | ||||
| Number: | Number 11 | ||||
| Page Range: | Article number 112005 | ||||
| DOI: | doi: 10.5606/tgkdc.dergisi.2013.6683 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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