BABAR Publications

Detailed Index as of March 29, 2024 02:56

PUB-13/002 Search for B->K(*)nunu and invisible quarkonium decays
Doc Type Journal Papers
Record Created January 15, 2013
SLAC-PUB
SLAC-PUB-15411  No citations
Preprint # 1303.7465 [hep-ex]
Accession Code DD11136
First Author Lees
Abstract
content_type = "text/x-tex"
user_agent   = "claudebot"
moz          = "claudebot"
moz_version  = ""
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.
Revisions and Files 1 revised January 15, 2013
no files
Submitted ToPhysical Review D
Date SubmittedApril 1, 2013
Journal Year2013
Journal Volume87
Journal Article/Page Range112005
Categories
  • AWG: Leptonic b and c Decays