Speaker
Dmitri Ryabchikov
(Institute for High Energy Physics (RU))
Description
The upgraded VES detector has recently collected the highest
world statistics of the reaction pi- Be -> pi- pi0 pi0 Be
- about 14 000 000 events. This allows us to perform mass
independent partial wave analysis in 10 non-equidistant
intervals of squared momentum transfer t' in the region
0 < t' < 1 GeV^2.
The second stage of the analysis is the model-dependent
fit describing 2-dim dependence of PWA sub-density matrix
on (m(3pi) , t') by resonant and background contributions.
Results of the fit demonstrate that production of resonances is observed
by both coherent and incoherent diffraction mechanisms.
The resonant parameters are discussed as well as t'-dependence
of their intensities and production phases.
Author
Dmitri Ryabchikov
(Institute for High Energy Physics (RU))
