Light-meson spectroscopy and combined analysis of processes with pseudoscalar mesons

0341380 - ÚJF 2010 RIV US eng J - Journal Article
Surovtsev, Yu .S. - Bydžovský, Petr - Kaminski, R. - Nagy, M.
Light-meson spectroscopy and combined analysis of processes with pseudoscalar mesons.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 81, č. 1 (2010), 016001/1-016001/21. ISSN 1550-7998
R&D Projects: GA ČR GA202/08/0984
Institutional research plan: CEZ:AV0Z10480505
Keywords : COUPLED-CHANNEL ANALYSIS * CHEW-LOW EXTRAPOLATIONS * SCATTERING PHASE-SHIFT
Subject RIV: BE - Theoretical Physics
Impact factor: 4.964, year: 2010

The status and parameters of the scalar, vector, and tensor mesonic resonances are obtained in the multichannel analysis of processes pi pi -> pi pi, K (K) over bar, eta eta, and eta eta' and compared with other results. For example, we obtained the f(0)(600) meson with mass 774 +/- 15 MeV and width 988 +/- 36 MeV (the pole position on sheet II is 596 - i494 MeV) and the first rho-like meson with mass 1275 +/- 32 MeV and total width 304 +/- 24 MeV, which differ significantly from the mean value 1459 +/- 11 MeV cited in the Particle Data Group tables. Spectroscopic implications from results of these analyses and possible classification of the resonance states in terms of the SU(3) multiplets are also discussed.
Permanent Link: http://hdl.handle.net/11104/0184390