The Decay {eta}->{pi}+{pi}-{pi}0 and the u3-Term of the (3,Formula)+(Formula,3) Model

Autor: Matsubara, Yoshimi, Tameike, Seiichi
Zdroj: Progress of Theoretical Physics: PTP; May 1977, Vol. 57 Issue: 5 p1679-1679, 1p
Abstrakt: A detailed analysis of the decay η→π+π-π0 is presented based on the u3-term of the (3,3)+(3,3) model. A perturbation scheme is given in which π0-η-η' mixing is treated systematically. It is shown that the rapidly varying pole structures disappear. The slope parameter -2/µη is derived in a convincing way. While the rate Γ+-0 is not determined completely, it is argued that η-pole contribution may not be negligible and that the contribution has a possibility to save the factor 3 discrepancy of the width between the theory and the experiment.
Databáze: Supplemental Index