PUB-13/002 Search for B->K(*)nunu and invisible quarkonium decays |
Doc Type |
Journal Papers |
Record Created |
January 15, 2013 |
SLAC-PUB |
Preprint # |
1303.7465 [hep-ex] |
Accession Code |
DD11136 |
First Author |
Lees |
Abstract |
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We search for the flavor-changing neutral-current decays B->K(*)nunubar, and the invisible decays J/psi->nunubar and psi(2S)->nunubar via B->K(*)J/psi and B->K(*)psi(2S) respectively, using a data sample of 471 x10^6 BB pairs collected by the BaBar experiment. We fully reconstruct the hadronic decay of one of the B mesons in the Upsilon(4S)->BB decay, and search for the B->K(*)nunubar decay in the rest of the event. We observe no significant excess of signal decays over background and report branching fraction upper limits of BR(B+->K+nunubar)<3.7 x10^-5, BR(B0->K0nunubar)< 8.1 x10^-5, BR(B+->K*+nunubar)<11.6 x10^-5, BR(B0->K*0nunubar)<9.3 x10^-5, and combined upper limits of BR(B->Knunubar)<3.2 x10^-5 and BR(B->K*nunubar)<7.9 x10^-5, all at the 90% confidence level. For the invisible quarkonium decays, we report branching fraction upper limits of BR(J/psi->nunubar)<3.9 x10^-3 and BR(psi(2S)->nunubar)<15.5 x10^-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(*)nunubar decays over the full kinematic spectrum.
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Revisions and Files |
1 revised January 15, 2013 no files
Submitted To | Physical Review D |
Date Submitted | April 1, 2013 |
Journal Year | 2013 |
Journal Volume | 87 |
Journal Article/Page Range | 112005 |
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Categories |
- AWG: Leptonic b and c Decays
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