Norio Hoshizaki

p-p scattering at 660 Mev.

A method is presented for analyzing data on nucleonnucleon scattering in the energy region where absorption processes cannot be neglected. The imaginary parts of the phase shifts are estimated from data on pion production with the use of the (3/2,3/2) resonance model. Secondly the scattering data are analyzed to obtain real phase shifts. The search is made for real phase shifts in the phase- shift space, which is restricted by extrapolating the solution established below about 400 Mev. An analysis is made, according to this scheme, for p-p scattering at 660 Mev. The absorption occurs mainly in the initial P, D, and F states. Data on elastic differential cross section, polarization, and depolarization can be reproduced by a set of phase shifts that is smoothly connected with a particular solution below about 400 Mev. The measured C/sub nn/(90 nif- ) and C /sub Kp/(90 nif- ) values are also consistent with those predicted by the solution obtained. (auth)

Absorption, Polarization Phenomena and Two-Baryon Interactions

A study is made of polarization effects in high-energy scattering. Consideration in the limiting case of complete absorption, or of the absence of real phase shifts, leads to the possibility of obtaining information on two- baryon elastic interactions from polarization experiments at high energies. An approach to two-baryon interactions at close distance is briefly described.

(3, 3)-Resonance and Energy Dependence of a Normal Spin-Correlation Coefficient in p-p Scattering

The energy dependence of the normal spin-correlation coefficient C/sub nn/(90 deg ) in p-p scattering is analyzed to investigate the proposal that the large value of the coefficient at 660 Mev can be interpreted as an effect of the formation of a (3,3)-resonance in the meson ( pi ) production processes. (C.E.S.)

p-p Scattering at 660 MeV. II

It is shown that the values of the rotation parameter R and the spin correlation coefficient C/sub nn/ predicted in a previous solution are consistent with recent data. The R values predicted by the phase shifts are plotted against center-of-mass scattering angle be- , where the relativistic formalism is employed in the calculation. A plot of C/sub nn/ vs. be- is given for comparison with the new data. (C.E.S.)

pp phase shifts and dibaryon resonances

The 3F3(2.22 GeV) and 1D2(2.17 GeV) structures are analyzed for 1.1–3.0 GeV/c pp interactions. (AIP)