First observation of $\eta(1405)$ decays into $f_0(980)\pi^0$

Abstract
The decays $J/\psi\rightarrow\gamma\pi^+\pi^-\pi^0$ and $J/\psi\rightarrow\gamma\pi^0\pi^0\pi^0$ are analyzed using a sample of $225\times10^6$ $J/\psi$ events collected with the BESIII detector. The decay of $\eta(1405)$→$f_0(980)\pi^0$ with a large isospin violation is observed for the first time. The width of the $f_0(980)$ observed in the dipion mass spectra is anomalously narrower than the world average. Decay rates for three-pion decays of the $\eta^′$ are also measured precisely.
Description
Keywords
Decayrate, Isospin violation, Mass spectra, Mass spectrometry, Decay (organic)
Citation
Ablikim, M., Achasov, M. N., Alberto, D., Ambrose, D. J., An, F. F., An, Q., . . . Zuo, J. X. (2012). First observation of $\eta(1405)$ decays into $f_0(980)\pi^0$. Physical Review Letters, 108(18), 182001. http://dx.doi.org/10.1103/PhysRevLett.108.182001
DOI
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Rights
© 2012 American Physical Society.
Type
Article