Recent measurements of hadronic branching fractions of D and Ds mesons,
performed by the BaBar and Belle experiments at the asymmetric e+e- B factories
colliders PEP II and KEKB, are reviewed.Comment: To be published in the proceedings of CHARM07, Ithaca, NY, August
2007, eConf C07080
A Dalitz plot analysis of B0→ηc​(1S)K+π− decays is performed using data samples of pp collisions collected with the LHCb detector at centre-of-mass energies of s​=7, 8 and 13 TeV, corresponding to a total integrated luminosity of 4.7 fb−1. A satisfactory description of the data is obtained when including a contribution representing an exotic ηc​(1S)π− resonant state. The significance of this exotic resonance is more than three standard deviations, while its mass and width are 4096±20 −22+18​ MeV and 152±58 −35+60​ MeV, respectively. The spin-parity assignments JP=0+ and JP=1− are both consistent with the data. In addition, the first measurement of the B0→ηc​(1S)K+π− branching fraction is performed and gives B(B0→ηc​(1S)K+π−)=(5.73±0.24±0.13±0.66)×10−4, where the first uncertainty is statistical, the second systematic, and the third is due to limited knowledge of external branching fractions