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

  • Author(s): Lees, JP
  • Poireau, V
  • Tisserand, V
  • Grauges, E
  • Palano, A
  • Eigen, G
  • Stugu, B
  • Brown, DN
  • Kerth, LT
  • Kolomensky, YG
  • Lee, M
  • Lynch, G
  • Koch, H
  • Schroeder, T
  • Hearty, C
  • Mattison, TS
  • McKenna, JA
  • So, RY
  • Khan, A
  • Blinov, VE
  • Buzykaev, AR
  • Druzhinin, VP
  • Golubev, VB
  • Kravchenko, EA
  • Onuchin, AP
  • Serednyakov, SI
  • Skovpen, YI
  • Solodov, EP
  • Todyshev, KY
  • Yushkov, AN
  • Kirkby, D
  • Lankford, AJ
  • Mandelkern, M
  • Dey, B
  • Gary, JW
  • Long, O
  • Vitug, GM
  • Campagnari, C
  • Franco Sevilla, M
  • Hong, TM
  • Kovalskyi, D
  • Richman, JD
  • West, CA
  • Eisner, AM
  • Lockman, WS
  • Martinez, AJ
  • Schumm, BA
  • Seiden, A
  • Chao, DS
  • Cheng, CH
  • Echenard, B
  • Flood, KT
  • Hitlin, DG
  • Ongmongkolkul, P
  • Porter, FC
  • Andreassen, R
  • Huard, Z
  • Meadows, BT
  • Sokoloff, MD
  • Sun, L
  • Bloom, PC
  • Ford, WT
  • Gaz, A
  • Nauenberg, U
  • Smith, JG
  • Wagner, SR
  • Ayad, R
  • Toki, WH
  • Spaan, B
  • Schubert, KR
  • Schwierz, R
  • Bernard, D
  • Verderi, M
  • Playfer, S
  • Bettoni, D
  • Bozzi, C
  • Calabrese, R
  • Cibinetto, G
  • Fioravanti, E
  • Garzia, I
  • Luppi, E
  • Piemontese, L
  • Santoro, V
  • Baldini-Ferroli, R
  • Calcaterra, A
  • De Sangro, R
  • Finocchiaro, G
  • Martellotti, S
  • Patteri, P
  • Peruzzi, IM
  • Piccolo, M
  • Rama, M
  • Zallo, A
  • Contri, R
  • Guido, E
  • Lo Vetere, M
  • Monge, MR
  • Passaggio, S
  • Patrignani, C
  • Robutti, E
  • et al.
Abstract

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.

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