Analysis of the reaction π{sup −}Be → π{sup −}π{sup 0}π{sup 0}Be at VES

• Published in: AIP conference proceedings Vol. 1701; no. 1
• Main Authors: Ryabchikov, D., Dorofeev, V., Ekimov, A., Gotman, V., Ivashin, A., Kachaev, I., Kalendarev, V., Kholodenko, M., Konstantinov, V., Matveev, V., Nazarov, E., Nikolaenko, V., Plekhanov, A., Salomatin, Yu, Sugonyaev, V., Volkov, E., Khokhlov, Y., Zaitsev, A., Moscow Institute of Physics and Technology, Dolgoprudny, Mikhasenko, M., now at Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, Polyakov, B.
• Format: Journal Article
• Language: English
• Published: United States 22.01.2016
• Subjects: BREIT-WIGNER FORMULA; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DENSITY MATRIX; MASS; MEV RANGE 10-100; MOMENTUM TRANSFER; PARITY; PARTIAL WAVES; SPIN; STATISTICS
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.4938637

We present the results of the analysis of diffractive reaction π{sup −}Be → π{sup −}π{sup 0}π{sup 0}Be measured with upgraded VES detector with the statistics of about 16 · 10{sup 6} events. The mass-independent partial-wave analysis is performed using set of 70 partial waves corresponding to natural-parity exchange mechanism and restricting the rank of spin-density matrix N{sub r} = 1. The data is divided into 40 MeV m(3π) bins and in 10 intervals of momentum transfer squared t′. The sub-density-matrix of mass independent PWA is subject to further mass dependent fits using Breit-Wigner resonant terms and coherent non-resonant backgrounds.