Author/Authors :
C.A. Baker، نويسنده , , C.J. Batty، نويسنده , , K. Braune، نويسنده , , D.V. Bugg، نويسنده , , N. Djaoshvili، نويسنده , , W. Dünnweber، نويسنده , , M.A. Faessler، نويسنده , , F. Meyer-Wildhagen، نويسنده , , L. Montanet، نويسنده , , I. Uman، نويسنده , , S. Wallis-Plachner، نويسنده , , B.S. Zou، نويسنده ,
Abstract :
Crystal Barrel data are presented for p̄p→ωπ+π−π0 at rest, with ω→π+π−π0. A small but definite signal confirms a0(1450) decaying to ωρ. Its branching ratio to ωρ is a factor 10.7±2.3 larger than to ηπ, where it was first identified. When fitted with a Breit–Wigner amplitude which includes the s-dependence of the ωρ channel, the pole position is M=1440+40−15−i(55±7) MeV.
The exotic π1(1600) is observed decaying to b1π with orbital angular momenta L=0 and 2. There is also a strong JPC=1++ signal consistent with a1(1640) decaying to ωρ and a much weaker signal for decays to [b1(1235)π]L=1. The strongest contribution to the data is a JPC=0−+ signal in ωρ suggesting a pole at M=1470±15−i(57±7) MeV.
