Baryon mass splitting by the strong hyperfine interaction and SU(3) breaking

π+π0 and K+K0 mass differences in the st

π+π0 and K+K0 mass differences in the standard SU(3)c × SU(2)L × U(1) theory of strong, electromagnetic, and weak interactions: B. Machet and A. A. Natale, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 141 KB

Lattice actions are constructed for free Dirac and Majorana fermions of arbitrary (half integer) spin using various extensions of the spin f Kogut-Susskind, Klhler, and Wilson formalisms. In each case, the spectrum degeneracy and preservation of gauge invariance are analysed, and the equivalence or