On the S-wave piD-scattering length in the relativistic field theory model of the deuteron

The S-wave scattering length of the strong pion-deuteron (pi D) scattering is calculated in the relativistic field theory model of the deuteron suggested in [1,2].The theoretical result agrees well with the experimental data. The important role of the Delta-resonance contribution to the elastic pi D-scattering is confirmed.Comment: 7 pages, no figures, accepted for publication in Z. Phys.

Weinberg like sum rules revisited

The generalized Weinberg sum rules containing the difference of isovector vector and axial-vector spectral functions saturated by both finite and infinite number of narrow resonances are considered. We summarize the status of these sum rules and analyze their overall agreement with phenomenological Lagrangians, low-energy relations, parity doubling, hadron string models, and experimental data.Comment: 31 pages, noticed misprints are corrected, references are added, and other minor corrections are mad

Update on the kappa

New Focus data on Dplus -> Kminus piplus piminus are fitted to the kappa, together with earlier data from LASS, E791 and BES 2. There is a clear low mass K-pi peak due to the kappa pole. Inclusion of the I=3/2 K-pi amplitude gives only a marginal improvement to the fit and almost no change to the kappa peak. An improved formula for the kappa gives a better fit than that used earlier. The kappa pole moves to 663 +- 8(stat) +- 34(syst) -i[329 +- 5(stat) +- 22(syst)] MeV. The K0(1430) pole is at 1427 +- 4(stat) +- 13(stat) -i[135 +- 5(stat) +- 20(syst)] MeV.Comment: 11 pages figures, 2 table

Electronics Circuits Amplifiers And Gates

xii, 377 hal.; ill.; 38c