期刊
PHYSICAL REVIEW D
卷 96, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.96.036013
关键词
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资金
- Russian Foundation for Basic Research [16-02-00065]
- Presidium of the Russian Academy of Sciences [0314-2015-0011]
Using the data on the decay D-s(+) -> f(0)(980)pi(+) -> K+ K- pi(+), we estimate the amplitude of the process D-s(+) -> [f(0)(980) -> (K+ K- + K-0 K-0) -> a(0)(0(980))]pi(+) -> eta pi(0)pi(+), caused by the mixing of a(0)(0)(980) and f(0)(980) resonances that breaks the isotopic invariance due to the K+ and K-0 meson mass difference. Effects of the interference of this amplitude with the amplitudes of the main mechanisms responsible for the decay D-s(+) -> eta pi(0)pi(+) are analyzed. As such mechanisms, we examine the transition D-s(+) -> eta rho(+) -> eta pi(0)pi(+) , which is observed in experiment, and the possible transition D-s(+) -> (a(0)(0)(980)pi(+) + a(0)(+)(980)pi(0)) -> eta pi(0)pi(+) , It is shown that the rapidly varying phase of the a(0)(0)(980) - f(0)(980) transition amplitude strongly influences the interference curves.
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