标题： 接近手征极限的重叠和固定点作用下的束缚态 显示英文标题

标题： Bound states for Overlap and Fixed Point Actions close to the chiral limit

摘要： 我们研究了双味格点施温格模型中质量费米子的重叠和固定点狄拉克算子。 三重态（介子）和单态（eta）束缚态的质量被确定到小费米子质量，并且质量依赖性与各种连续模型近似进行了比较。 在手征极限附近，在非常小的费米子质量下，固定点算子存在稳定性问题，这些问题在本研究中主要由有限尺寸效应主导。 显示英文摘要

摘要： We study the overlap and the fixed point Dirac operators for massive fermions in the two-flavor lattice Schwinger model. The masses of the triplet (pion) and singlet (eta) bound states are determined down to small fermion masses and the mass dependence is compared with various continuum model approximations. Near the chiral limit, at very small fermion masses the fixed point operator has stability problems, which in this study are dominated by finite size effects,