The Gamow-Teller States in Relativistic Nuclear Models
Abstract
The Gamow-Teller(GT) states are investigated in relativistic models. The Landau-Migdal(LM) parameter is introduced in the Lagrangian as a contact term with the pseudo-vector coupling. In the relativistic model the total GT strength in the nucleon space is quenched by about 12% in nuclear matter and by about 6% in finite nuclei, compared with the one of the Ikeda-Fujii-Fujita sum rule. The quenched amount is taken by nucleon-antinucleon excitations in the time-like region. Because of the quenching, the relativistic model requires a larger value of the LM parameter than non-relativistic models in describing the excitation energy of the GT state. The Pauli blocking terms are not important for the description of the GT states.
Keywords
Cite
@article{arxiv.nucl-th/0306080,
title = {The Gamow-Teller States in Relativistic Nuclear Models},
author = {Haruki Kurasawa and Toshio Suzuki and Nguyen Van Giai},
journal= {arXiv preprint arXiv:nucl-th/0306080},
year = {2009}
}
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