ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2005, vol. 72, p. 1-6
Observation of B̄0→D0η′ and B̄0→D *0η′
We report the observation of B̄0→D0η′ and the first observation of B̄0→D*0η′, using 140fb-1 of data collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. We find the branching fractions to be B(B̄0→D0η′)=[1.14±0.20(stat)+0.10-0.13(syst)] ×10-4 and B(B̄0→D*0η′)=[1.21±0.34(stat) ±0.22(syst)]×10-4 with significances including systematic uncertainties of 8.9 and 5.3 standard deviations, respectively. © 2005 The American Physical Society.