15479695
Excited states of heavy baryons in the Skyrme model.
We obtain the spectra of excited heavy baryons containing one heavy quark by quantizing the exactly solved heavy meson bound states to the Skyrme soliton. The results are comparable to the recent experimental observations and quark model predictions, and are consistent with heavy quark spin symmetry. However, the somewhat large dependence of the results on the heavy quark mass strongly calls for the incorporation of the soliton-recoil effects. {copyright} {ital 1996 The American Physical Society.}
41496235
Comments on "Neutron-proton mass difference in the chiral solitonic bag model"
It is pointed out that the topological soliton bag is incompletely quantized in the papers of Durgut, Pak, and Yilmaz and of Wittman and Woloshyn, leading to results on the neutron-proton mass difference and other phenomena that are not implied by the model. The purpose of this paper is to clarify how and where their scheme goes wrong and to propose an alternative consistent scheme of quantization.
7089219
Energy dependence of the Gamow-Teller strength in p-shell nuclei observed in the (n,p) reaction.
Cross sections from 0{degree} to 10{degree} (lab) have been measured for ground-state Gamow-Teller transitions for the reactions {sup 6}Li({ital n},{ital p}){sup 6}He, {sup 12}C({ital n},{ital p}){sup 12}B and {sup 13}C({ital n},{ital p}){sup 13}B from 60 to 260 MeV. The 90-m station at the Weapons Neutron Research facility at Los Alamos National Laboratory was used to obtain these data. Unit cross sections ({sigma}) have been obtained and are compared with existing ({ital n},{ital p}) and ({ital p},{ital n}) data. The volume integrals ({ital J}{sub {sigma}{tau}}) for the spin-flip isospin-flip part of the effective nucleon-nucleon interaction have also been obtained and are compared with theoretical predictions.