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hep-ex2003
Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
The Belle Collaboration, S. -K. Choi, S. L. Olsen
We report the observation of a narrow charmonium-like state produced in the exclusive decay process B+ -> K+ pi+pi- J/psi. This state, which decays into pi+pi- J/psi, has a mass of…
hep-ex2003
Observation of
A. Ishikawa
We report the first observation of the flavor-changing neutral current decay and an improved measurement of the decay , where $\ell…