A Search for B -> K(*) nu nubar and Invisible Quarkonium Decays
- Lees, J.P.
- Poireau, V.
- Tisserand, V.
- Arnaud, N.
- Davier, M.
- Derkach, D.
- Grosdidier, G.
- Le Diberder, F.
- M. Lutz, A.
- Malaescu, B.
- Roudeau, P.
- H. Schune, M.
- Stocchi, A.
- Wormser, G.
- Bernard , D.
- Verderi, M.
- Emery, S.
- Hamel De Monchenault, G.
- Vasseur, G.
- Yèche, Ch.
- Akar, S.
- Ben-Haim, E.
- Bomben, M.
- Bonneaud, G.R.
- Briand, H.
- Calderini, G.
- Chauvau, J.
- Hamon, O.
- Leruste, Ph.
- Marchiori, G.
- Ocariz, J.
- Sitt, S.
DOIAbstract
15 pages, 7 postscript figures, submitted to Phys. Rev. D - See paper for full list of authorsWe search for the flavor-changing neutral-current decays B->K(*)\nu\nu, and the invisible decays J/psi->\nu\nu\ and psi(2S)->\nu\nu\ 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(*)\nu\nu\ 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+\nu\nu)K0\nu\nu)K*+\nu\nu)K*0\nu\nu)K\nu\nu)K*\nu\nu)\nu\nu)\nu\nu)K(*)\nu\nu\ decays over the full kinematic spectr...
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