Study of the ηπ0 system in the mass range up to 1200 MeV
/ Authors
D. Alde, F. Binon, M. Boutemeur, C. Bricman, S. Donskov, M. Gouanére, A. Inyakin, S. Inaba, V. Kachanov, G. Khaustov
and 16 more authors
E. A. Knapp, A. Kondashov, A. Lednev, V. Lishin, J. Peigneux, M. Poulet, Y. Prokoshkin, S. Sadovsky, V. Samoylenko, P. Shagin, A. Singovsky, A. Sobol, J. Stroot, V. Sugonyaev, K. Takamatsu, T. Tsuru
/ Abstract
The reaction π−p→ηπ0n has been studied with GAMS-2000 spectrometer in the secondary 38 GeV/c π−-beam of the IHEP U-70 accelerator. Partial wave analysis of the reaction has been performed in the ηπ0 mass range up to 1200 MeV. The a0(980)-meson is seen as a sharp peak in S-wave. The t-dependence of a0(980) production cross section has been studied. Dominant production of the a0(980) at a small transfer momentum t confirms the hypothesis of Achasov and Shestakov about significant contribution of the ρ2 exchange (IGJPC=1+2−−) in the mechanism of a0(980) meson production in t-channel of the reaction.
DOI: 10.1063/1.56089