Topic: Three-body unitary coupled channel analysis on η (1405/1475) 

Speaker: Prof. Jia-Jun Wu

Coordinates: PCFT C1124, 16:00, Thursday, May 16

Abstract: The new BESIII data on J/ψ→γη(1405/1475)→γKKπ is more precise than before. A three-body unitary coupled-channel analysis of experimental Monte Carlo outputs for J/ψ→γη(1405/1475)→γKKπ is introduced. This model does not only fit the KKπ Dalitz plot distributions but also the branching ratios of “γππη” and “γγππ” final states relative to that of “γKKπ”. After fitting, we successfully extract the η(1405/1475) pole locations. The η(1405/1475) states are described by two bare states dressed with continuum states. At last, we post predict the distribution of J/ψ→γη(1405/1475)→γππη, γπππ, γγππ .