Search for exclusive BB decays to J/ψJ/\psi and η\eta or π0\pi^0 with the L3 detector

Collaboration
Oct, 1996
15 pages
Published in:
  • Phys.Lett.B 391 (1997) 481-490
Report number:
  • CERN-PPE-96-152
Experiments:

Citations per year

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Abstract: (Elsevier)
A search for exclusive decays of B d 0 and B s 0 mesons has been performed in the channels B d 0 → J η , B s 0 → J η , B d 0 → J π 0 and B s 0 → J π 0 . The data sample consisted of more than three and half million hadrozic Z decays collected by the L3 experiment at LEP from 1991 through 1995. No candidate events have been observed for any of the modes thus determining upper limits at 90% confidence level: 3.2 × 10 −4 on Br(B d 0 → J π 0 ) and the first experimental limits: Br(B d 0 → J η ) < 1.2 × 10 −3 , Br(B s 0 → J η ) < 3.8 × 10 −3 , Br(B s 0 → J π 0 ) < 1.2 × 10 −3 .
  • electron positron: colliding beams
  • electron positron: annihilation
  • Z0: electroproduction
  • Z0: hadronic decay
  • B0: hadronic decay
  • B/s0: hadronic decay
  • J/psi(3100): leptonic decay
  • eta: radiative decay
  • pi0: radiative decay
  • B0: branching ratio
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