解析类时过渡形状因子的实用指南
A practical guide to unravel time-like transition form factors
摘要：
定义了一种确定矢量介子如φ（1020）、ω（782）和ρ 0（770）递归介子的质量、宽度和耦合常数的方法。从过程的衰变率和截面数据开始：phi -> M_I γ，phi -> M_I e+e-和e+e- -> M_I phi，其中M_I是赝标或标量介子，同位旋I= 0，1，描述顶点phi-γ-M_I的类时跃迁形状因子在低能区<3-4 GeV用矢量介子传播子描述参数化，夸克计数规则规定的高能量行为，和解析性强加的色散关系的手段。
英文摘要：
A method to determine masses, widths and coupling constants of vector mesons, like phi(1020), omega(782) and rho0(770) recurrences is defined. Starting from data on decay rates and cross sections for the processes: phi -> M_I gamma, phi -> M_I e+e- and e+e- -> M_I phi, where M_I is a pseudoscalar or scalar meson with isospin I=0,1, the time-like transition form factors, which describe the vertex phi-gamma-M_I, are parametrized using a vector meson-propagators description in the low energy region <3-4 GeV, the quark-counting rule prescription for the high energy behavior, and the analyticity imposed by means of the dispersion relations.
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