Three-body final state interaction in η → 3π updated
Three-body final state interaction in η → 3π updated
复制标题
DOI：
10.1016/j.physletb.2017.05.092
复制
发表时间：
2016-08
影响因子：
4.4
通讯作者：
P. Guo;I. Danilkin;I. Danilkin;C. Fernández-Ramírez;V. Mathieu;A. Szczepaniak;A. Szczepaniak
中科院分区：
文献类型：
--
作者：
P. Guo;I. Danilkin;I. Danilkin;C. Fernández-Ramírez;V. Mathieu;A. Szczepaniak;A. Szczepaniak
In view of the recent high-statistic KLOE data for the η→ π+ π− π 0 decay, a new determination of the quark mass double ratio has been done. Our approach relies on a dispersive model that takes into account rescattering effects between three pions via subenergy unitarity. The latter is essential to reproduce the Dalitz plot distribution. A simultaneous description of the KLOE and WASA-at-COSY data is achieved in terms of just two real parameters. From a global fit, we determine Q= 21.6±1.1. The predicted slope parameter for the neutral channel α=− 0.025±0.004 is in reasonable agreement with the PDG average value.
