Pole position of measured in reactions

相川 脩*; 橋本 直; 谷田 聖; 他73名*

Physics Letters B, 837, p.137637_1 - 137637_8, 2023/02

https://doi.org/10.1016/j.physletb.2022.137637

We measured a set of , , and invariant mass spectra below and above the mass threshold in -induced reactions on deuteron. We deduced the -wave and scattering amplitudes in the isospin 0 channel in the framework of a and coupled channel. We find that a resonance pole corresponding to is located at 1417.7(fitting errors)(systematic errors) + (fitting errors)(systematic errors)] MeV/, closer to the mass threshold than the value determined by the Particle Data Group.