1997/05/23 by A. V. Anisovich, A. Sarantsev, A. V. Sarantsev · 6 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/s0370-2693(97)01089-7
published as Phys.Lett.B413:137-146,1997 · 18 pages, 3 Postscript figures
arxiv created 1997/05/23 · openalex publication_date 1997/11/01 · arxiv updated 2009/11/30 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
A K-matrix re-analysis of the K-pi S-wave is performed in the mass region 900-2100 MeV, and solutions which describe the data well are found. The solution with two resonances in the (IJP=1/2 0+)-wave has poles at (1415 pm 25)- i(165 pm 25) MeV and (1820 pm 40) -i(125 pm 50) MeV, close to the previous result of D. Aston et al., Nucl.Phys., B296 (1988) 493. The corresponding bare states, which are the subjects of a qqbar classification, are: K0bare(1220+50-60) and K0bare(1885+50-80). Within the restored bare states, a construction of the 13P0 qqbar and 23P0 qqbar nonets is completed. The three resonance solutions are analysed as well, the corresponding bare states are found, and the qqbar-nonet classification is suggested. In all variants of our qqbar-classification, the resonances a0(980) and f0(980) (or their bare counterparts) are non-exotic, and an extra scalar/isoscalar state exists in the mass region 1300-1700 MeV, being a good candidate for the lightest scalar glueball.