具有动量依赖相互作用的KKbar分子
KKbar molecules with momentum-dependent interactions
摘要：
结果表明，由标准SU_V（3）× SU_A（3）相互作用拉格朗日量通过矢量介子交换产生动量相关的K ~-反K ~-相互作用，在坐标空间中产生一个非定域势，该势可以不经近似地引入包含径向相关的K ~-有效质量的非相对论Bethe-Salpeter波动方程，该方程出现在完全对称的动能算符中，除了局部电势之外。本文给出了f_0（980）和a_0（980）的质量和衰变宽度的估计值，它们被认为是同位旋为0和1的KKbar分子，以及K^+K^-原子束缚态（kaonium）的质量和衰变宽度，并与以前类似性质的研究进行了比较。有人认为，没有一个更好的强子形状因子的知识，它是不可能区分分子与基本粒子模型的轻标量介子的结构。
英文摘要：
It is shown that the momentum-dependent kaon-antikaon interactions generated via vector meson exchange from the standard SU_V(3) x SU_A(3) interaction Lagrangian lead to a non-local potential in coordinate space that can be incorporated without approximation into a non-relativistic version of the Bethe-Salpeter wave equation containing a radial-dependent effective kaon mass appearing in a fully symmetrized kinetic energy operator, in addition to a local potential. Estimates of the mass and decay widths of f_0(980) and a_0(980), considered as KKbar molecules of isospin 0 and 1, as well as for K^+K^- atomic bound states (kaonium) are presented, and compared with previous studies of a similar nature. It is argued that without a better knowledge of hadronic form factors it is not possible to distinguish between the molecular versus elementary particle models for the structure of the light scalar mesons.
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