广西科学2016，Vol.23Issue(3)：202-205,4.DOI:10.13656/j.cnki.gxkx.20160713.007
次领头阶低能常数的改进
Improvement of the Next Leading Order Low-energy Constants
摘要
Abstract
Objective]There is not an effective way to calculate the low-energy constants (LECs) for the pseudoscalar meson chiral perturbation theory.There are too many input parameters, which reduce the predictability of the theory.Reducing the input parameters in the calculation was carried out through the appropriate treatment,in order to get a set of theoretical values that are consistent with the experiments.[Methods]The Schwinger-proper time method was in-troduced into theΛto infinity,and a leading order of the LECs was renormalized in the meson mass at 770 MeV.All the next leading order LECs can be obtained through Schwinger-Dyson e-quation.[Results]A set of parameters that match the experiments was obtained through meas-uring parameters and comparing the relationships between the LECs and coupling constants. Finally the input parametersΛand F0 were reduced in the three-flavor and two-flavor quark.[Conclusion]The new method that treats LECs by reducing the input parameters is feasible. Two-flavor LECs are sensitive to the coupling constants,but three-flavor LECs are not.关键词
手征微扰理论/耦合常数/低能常数Key words
chiral perturbation theory/coupling constants/low-energy constants分类
数理科学引用本文复制引用
蒋绍周,蒋杰臣..次领头阶低能常数的改进[J].广西科学,2016,23(3):202-205,4.基金项目
国家自然科学基金项目(11565004)资助。 （11565004）
