标题： f_0(600), kappa(800), rho(770) 以及 K*(892)，由单位化SU(3)手征微扰理论得到的夸克质量依赖性 显示英文标题

标题： f_0(600), kappa(800), rho(770) and K*(892), quark mass dependence from unitarized SU(3) Chiral Perturbation Theory

摘要： 我们研究了由单位化的一圈级消量子色动力学（ChPT）从弹性介子-介子散射生成的共振态f_0(600)、kappa(800)、rho(770)和K*(892)的参数对奇异夸克和非奇异夸克质量的依赖性。 我们同时拟合了所有实验上的散射数据，范围从0.8到1GeV，以及格点计算中直到π介子质量达到440MeV时的衰变常数和散射长度的结果。 然后，奇异夸克和非奇异夸克的质量从手征极限开始变化，直至格点研究感兴趣的数值。 在这些振幅中，rho(770)和K*(892)的质量和宽度呈现出相似且平滑的夸克质量依赖性。 相比之下，这两个标量在高夸克质量下表现出类似的非解析行为。 然而，f_0(600)对两个夸克质量的依赖性比kappa(800)和矢量更强。 我们还验证了格点假设中的矢量双介子耦合对夸克质量的独立性，而这一性质对于标量却失效了。 显示英文摘要

摘要： We study the strange and non-strange quark mass dependence of the parameters of the f_0(600), kappa(800), rho(770) and K*(892) resonances generated from elastic meson-meson scattering using unitarized one-loop Chiral Perturbation Theory. We fit simultaneously all experimental scattering data up to 0.8-1 GeV together with lattice results on decay constants and scattering lengths up to a pion mass of 440 MeV. Then, the strange and non-strange quark masses are varied from the chiral limit up to values of interest for lattice studies. In these amplitudes, the mass and width of the rho(770) and K*(892) present a similar and smooth quark mass dependence. In contrast, both scalars present a similar non-analyticity at high quark masses. Nevertheless the f_0(600) dependence on both quark masses is stronger than for the kappa(800) and the vectors. We also confirm the lattice assumption of quark mass independence of the vector two-meson coupling that, in contrast, is violated for scalars.