Abstract
The decays and are analyzed using a sample of events collected with the BESIII detector. The decay of with a large isospin violation is observed for the first time. The width of the observed in the dipion mass spectra is anomalously narrower than the world average. Decay rates for three-pion decays of the are also measured precisely.
- Received 14 January 2012
DOI:https://doi.org/10.1103/PhysRevLett.108.182001
© 2012 American Physical Society