出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We discuss mass splitting for degenerate tastes of staggered fermions based on an SO(2D) Clifford
algebra formulation. Rotationally invariant terms are added to the original staggered action with
the formulation. We have four candidates for improved mass terms that can split the degenerate
mass of staggered fermions. Among them, three type combinations are considered. We analyze
the mass matrix and the propagator in two-dimensional free theories and find only one case that
can identify with a light single Dirac mode.
