Further study of D+ s decays into π-π+π+

E. Klempt, M. Matveev, A.V. Sarantsev
2008 European Physical Journal C: Particles and Fields  
A Dalitz plot analysis of the OZI rule violating decay D^+_s into π^- π^+ π^+ is presented using different partial wave approaches. Scalar and vector waves are described by K-matrices; their production is parameterized in a P-vector approach. Alternatively, Breit-Wigner amplitudes and Flatté parametrization are used. Special emphasis is devoted to scalar mesons. The f_0(980) resonance provides the most significant contribution. Adding f_0(1500) to the scalar wave leads to an acceptable fit
more » ... acceptable fit while introduction of f_0(1370) and/or f_0(1710) does not lead to significant improvements. A scan of the scalar wave optimizes for M=1452± 22 MeV/c^2. When f_0(1710) is added, the mass uncertainty increases, and the fit yields M=1470± 60 MeV/c^2 which is fully compatible with the nominal f_0(1500) mass. The scalar wave seems to exhibit a phase motion of 270^∘ units in the mass range from 1200 to 1650 MeV/c^2.
doi:10.1140/epjc/s10052-008-0581-y fatcat:bacbv6upkrfirduspujoikk23i