Conservation laws in the $1f_{7/2}$ shell model of ${}^{48}$Cr

Abstract

Conservation laws in the $1f_{7/2}$ shell model of ${}^{48}$Cr found in numeric studies by Escuderos, Zamick and Bayman [A. Escuderos, L. Zamick, and B. F. Bayman, arXiv:0506050 (2005)] and me [K. Neergård, Phys. Rev. C \textbf{90}, 014318 (2014)] are explained by symmetry under particle-hole conjugation and the structure of the irreps of the symplectic group Sp(4). A generalization is discussed.

Comments: Some typos corrected