ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2008, vol. 100, p. -
Observation of a new DsJ meson in B+→D̄0D0K+ decays
We report the observation of a new DsJ meson produced in B+→D̄0DsJ→D̄0D0K+. This state has a mass of M=2708±9-10+11MeV/c2, a width Γ=108±23-31+36MeV/c2 and a 1- spin-parity. The statistical significance of this observation is 8.4σ. The results are based on an analysis of 449×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. © 2008 The American Physical Society.