https://doi.org/10.1140/epjc/s10052-008-0581-y
Regular Article - Experimental Physics
Further study of D+ s decays into π-π+π+
1
Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nußallee 14–16, 53115, Bonn, Germany
2
Petersburg Nuclear Physics Institute, Gatchina, Leningrad district, 188300, Russia
* e-mail: klempt@hiskp.uni-bonn.de
Received:
23
July
2007
Revised:
29
February
2008
Published online:
10
April
2008
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 f0(980) resonance provides the most significant contribution. Adding f0(1500) to the scalar wave leads to an acceptable fit while introduction of f0(1370) and/or f0(1710) does not lead to significant improvements. A scan of the scalar wave optimizes for M=1452 ± 22 MeV/c 2. When f0(1710) is added, the mass uncertainty increases, and the fit yields M=1470 ± 60 MeV/c 2 which is fully compatible with the nominal f0(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.
© Springer-Verlag , 2008
