No abstract

Assuming that the magnetic moment operator is a tensor transforming as the (15, 3) member of a 63 representation of U(8) or SU(8), we have compared the magnetic moments of all the baryons belonging to the 2 representation. The moments of the conventional particles like the S U P ) decuplets or octets stay unchanged. The charmed-baryon moments are expressed in terms of the magnetic moment of the proton.

Cross sections for elastic scattering of slow electrons (<10 eV) by He (Is, 2s) l **S have been computed in the static Hartree-Fock field and in the induced-polarization potential field of the atom, using the approximate parametrized form of Reeh's potential. The equation describing the complete elastic scattering process has been deduced from the Schrodinger equation. The potential terms are identified as the static central and the induced polarization potential. The scattering equation is numerically integrated to obtain the phase shifts for each partial wave. The computed cross section can satisfactorily account for the observed cross section. The characteristic feature is the relatively large contribution of higher partial waves to the total cross section, and the contributions of nine partial waves have been included.

The Lehmann-Symanzik-Zimmermann (LSZ) formalism is used in the Bronzan-Lee model to investigate the scattering processes in the lowest sectors. In this model, there are three heavy recoilless particles U, V, and N interacting with a θ particle. The processes allowed are U⇄Vθ and V⇄Nθ. In U and V sectors of this model all τ functions have been calculated, and relevant scattering and production amplitudes are evaluated. The mass, wavefunction, and vertex function renormalization constants have been found and they agree with the results previously obtained by Bronzan and later also by Liossatos.

The Lehmann-Symanzik-Zimmermann (LSZ) technique has been used to calculate all τ -functions of the UN-sector of the Bronzan-Lee model. Using the prescription of Liossatos, the Z