Showing papers in "Physical Review D in 1969"

Structure of phenomenological Lagrangians. 1.

Abstract: The general structure of phenomenological Lagrangian theories is investigated, and the possible transformation laws of the phenomenological fields under a group are discussed. The manifold spanned by the phenomenological fields has a special point, called the origin. Allowed changes in the field variables, which do not change the on-shell S matrix, must leave the origin fixed. By a suitable choice of fields, the transformations induced by the group on the manifold of the phenomenological fields can be made to have standard forms, which are described in detail. The mathematical problem is equivalent to that of finding all (nonlinear) realizations of a (compact, connected, semisimple) Lie group which become linear when restricted to a given subgroup. The relation between linear representations and nonlinear realization is discussed. The important special case of the chiral groups SU(2)×SU(2) and SU(3)×SU(3) is considered in detail.

Inelastic Electron-Proton and γ-Proton Scattering and the Structure of the Nucleon

Abstract: A model for highly inelastic electron-nucleon scattering at high energies is studied and compared with existing data. This model envisages the proton to be composed of pointlike constituents (“partons”) from which the electron scatters incoherently. We propose that the model be tested by observing ϒ rays scattered inelastically in a similar way from the nucleon. The magnitude of this inelastic Compton-scattering cross section can be predicted from existing electron-scattering data, indicating that the experiment is feasible, but difficult, at presently available energies.

Levels of Te-124 from the Decay of 4.2-Day I-124

Abstract: The population of levels of $^{124}\mathrm{Te}$ from the decay of 4.2-day $^{124}\mathrm{I}$ has been investigated by studying the $^{124}\mathrm{I}$ $\ensuremath{\gamma}$ rays with a Ge(Li) Compton suppression spectrometer and with NaI(Tl)-Ge(Li) coincidence systems. Seventy-two $\ensuremath{\gamma}$ rays were identified as originating from $^{124}\mathrm{I}$, and 62 of them were assigned to 24 levels of $^{124}\mathrm{Te}$. The levels populated from $^{124}\mathrm{I}$ decay are compared to the levels of $^{124}\mathrm{Te}$ populated from the decay of the $^{124}\mathrm{Sb}$ isomers. The nature of the levels is discussed in the framework of the quasiparticle and spherical vibrational models.