1. Searches for isospin-violating transitions χc0,2 → π0ηc.
- Author
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Ablikim, M., Cao, G. F., Chen, M. L., Dong, L. Y., Fang, J., Gong, W. X., Gu, M. H., Guo, A. Q., Guo, Y., Ji, Q., Li, G., Fang Liu, Min, T. J., Niu, S. L., Zhang, J. L., Zhao, Q., Zhao, Q. W., Zhou, L., Zhu, K., and Shepherd, M. R.
- Subjects
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ISOBARIC spin , *IONS , *BRANCHING ratios , *SYMMETRY breaking , *PHASE transitions , *ELECTRON-positron interactions - Abstract
We present the first upper-limit measurement of the branching fractions of the isospin-violating transitions χc0,2 → π0ηc. The measurements are performed using 106×106 ψ(3686) events accumulated with the BESIII detector at the BEPCII e+e− collider at a center-of-mass energy corresponding to the ψ(3686) mass. We obtained upper limits on the branching fractions at a 90% confidence level of B(χc0 → π0ηc)<1.6 × 10−3 and B(χc2 → π0ηc) < 3.2 × 10−3. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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