Study of dynamics of Phi --> pi+ pi- pi0 decay with CMD-2 detector
1998
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Abstract: (Elsevier)
A study of the φ → π + π − π 0 decay mode has been performed using a data sample of about 2.0 million φ decays collected by the CMD-2 detector at VEPP-2M collider in Novosibirsk. The following parameters of the φ -meson have been measured: Br ( φ → π + π − π 0 )=0.145±0.009±0.003 and δ φ − ω =162±17°. The analysis of the Dalitz plot showed the dominance of the φ → ρπ intermediate mechanism, the limits for the ratio of the direct amplitude of φ →3 π to that of φ → ρπ are −0.16< a 1 <0.11 at 90% C.L. The upper limits for the probabilities of the decay modes φ → π + π − η and direct φ → ργγ have been found for the first time: Br ( φ → π + π − η )<3×10 −4 and Br ( φ → ργγ )<5×10 −4 at 90% C.L.- electron positron: colliding beams
- electron positron: annihilation
- Phi(1020): electroproduction
- Phi(1020): hadronic decay
- Phi(1020): radiative decay
- Phi(1020): branching ratio
- upper limit
- interference: (Phi(1020) omega(783))
- rho(770): intermediate state
- magnetic detector: experimental results
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