Quark exchange currents in nuclei: Effective operator description
作者： Yoshiaki Yamauchi , Alfons Buchmann , Amand Faessler , Akito Arima
DOI: 10.1016/0375-9474(91)90431-5
关键词: Top quark 、 Top quark condensate 、 Meson 、 Quark 、 Up quark 、 Quark model 、 Physics 、 Down quark 、 Particle physics 、 Nucleon 、 Quantum electrodynamics
摘要: Abstract In this paper we introduce for the first time effective quark exchange current operators which can be used in nuclear structure calculations. To end solve equation of motion a microscopic hamiltonian using cluster model. We then construct electromagnetic operator on level, i.e. photon is coupled directly to quarks. By eliminating (internal) degrees freedom, derive an nucleon level. A part corresponds conventional impulse and meson currents with vertex factors predicted by addition, contains new non-local isospin-dependent terms are generated Pauli principle level (quark between nucleons). When evaluate these currents, use harmonic-oscillator wave functions as including short-range correlations. correlations solving Bethe-Goldstone our NN potential, derived from hamiltonian. investigate role additional magnetic moments elastic form several closed-shell ± 1 nuclei, such 15N, 17O, 39K.
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