We calculated the decay constant and radius of the pion in the framework of the Bethe-Salpeter equation with the vector-vector-type flat-bottom potential.The calculated results,f_(π)=102MeV and<r_(π)^(2)>^(1/2...We calculated the decay constant and radius of the pion in the framework of the Bethe-Salpeter equation with the vector-vector-type flat-bottom potential.The calculated results,f_(π)=102MeV and<r_(π)^(2)>^(1/2)=0.632fm,are close to experimental values of f_(π)=93 MeV and<r_(π)^(2)>^(1/2)=0.663±0.023fm.展开更多
The calculation model of the large bipolaron binding energy proposed by Verbist et al.is extended to arbitrary dimensions including fractal dimensions.It is found that the fractal dimension D=1.25 corresponds to the l...The calculation model of the large bipolaron binding energy proposed by Verbist et al.is extended to arbitrary dimensions including fractal dimensions.It is found that the fractal dimension D=1.25 corresponds to the lowest critical coupling constantα_(c)=1.9,D=1.73 corresponds to the highest critical ratio of dielectric constantsη_(c)=0.163,and when D≤1.145 bipolarons can not exist for any coupling constants and ratios of dielectric constants.展开更多
文摘We calculated the decay constant and radius of the pion in the framework of the Bethe-Salpeter equation with the vector-vector-type flat-bottom potential.The calculated results,f_(π)=102MeV and<r_(π)^(2)>^(1/2)=0.632fm,are close to experimental values of f_(π)=93 MeV and<r_(π)^(2)>^(1/2)=0.663±0.023fm.
基金Supported by the National Nonlinear Science Foundation.
文摘The calculation model of the large bipolaron binding energy proposed by Verbist et al.is extended to arbitrary dimensions including fractal dimensions.It is found that the fractal dimension D=1.25 corresponds to the lowest critical coupling constantα_(c)=1.9,D=1.73 corresponds to the highest critical ratio of dielectric constantsη_(c)=0.163,and when D≤1.145 bipolarons can not exist for any coupling constants and ratios of dielectric constants.
