a Study of Leading Strange Meson Resonances and Spin-Orbit Splittings in Negative Kaon Proton ---> Negative Kaon Positive Pion Neutron at 11 Gev/c.
Abstract
The results from a high statistics study of K(pi) elastic scattering in the reaction K('-)p (--->) K('-)(pi)('+)n are presented. The data for this analysis is taken from an 11 GeV/c K('-)p experiment performed on the Large Aperture Solenoidal Spectrometer (LASS) facility at the Stanford Linear Accelerator Center (SLAC). By selecting the very forward produced K('-)(pi)('+) events, a sample consisting of data for the K(pi) (--->) K(pi) elastic scattering reaction was extracted. The angular distribution for this meson -meson scattering is studied by using both a spherical harmonic monents analysis and a partial wave analysis (PWA). The previously established leading natural spin-parity strange meson resonances (the J('p) = 1('-) K*(895), the 2('+) K*(1430), and the 3('-) K*(1780)) are observed in the results from both the moments analysis and the PWA. In addition, evidence for a new spin 4 K* resonance with a mass of 2080 MeV and a width of about 225 MeV is presented. The results from the PWA confirm the existence of a 0('+)(kappa)(1490) and propose the existence of a second scalar meson resonance, the 0('+)(kappa)'(1900). Structure in the P wave amplitude indicates resonance behavior in the mass region near 1700 MeV. In two of the four ambiguous solutions for the mass region above 1800 MeV, there is strong evidence for another P wave resonant structure near 2100 MeV. The observed strange meson resonances are found to have a natural interpretation in terms of states predicted by the quark model. In particular, the mass splittings of the leading trajectory natural spin -parity strange meson states and the mass splittings between the spin-orbit triplet states are discussed.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- August 1981
- Bibcode:
- 1981PhDT........11H
- Keywords:
-
- Physics: Elementary Particles and High Energy;
- Elastic Scattering;
- Meson Resonance;
- Meson-Meson Interactions;
- Strangeness;
- Spherical Harmonics;
- Spin-Orbit Interactions;
- Atomic and Molecular Physics