论文标题
单位化手性扰动理论中的两个膜形式因素
Two-Meson Form Factors in Unitarized Chiral Perturbation Theory
论文作者
论文摘要
我们对标量，矢量和张Q夸克操作员诱导的两个光伪粘膜膜的形态进行了全面分析。理论框架是基于单位化手性扰动理论和分散关系的组合。手性扰动理论中低能的常数是通过全球拟合对两膜散射相移的可用数据固定的。通过迭代应用分散关系，可以改善从单位化手性扰动理论得出的每个形式。这项研究更新了文献中现有的结果，并探讨了先前未进行系统研究的结果，特别是单位化手性扰动理论中的两烯量张量形式。我们还讨论了这些形式的应用作为低能现象的强制输入的应用，例如半leptonic衰变$ b_s \toπ^+π^ - \ ell^+el^+el^+\ el^ - $和$τ$ Lepton decay $ thates for} for} for} $ fortation fortation for yourthation forthact
We present a comprehensive analysis of form factors for two light pseudoscalar mesons induced by scalar, vector, and tensor quark operators. The theoretical framework is based on a combination of unitarized chiral perturbation theory and dispersion relations. The low-energy constants in chiral perturbation theory are fixed by a global fit to the available data of the two-meson scattering phase shifts. Each form factor derived from unitarized chiral perturbation theory is improved by iteratively applying a dispersion relation. This study updates the existing results in the literature and explores those that have not been systematically studied previously, in particular the two-meson tensor form factors within unitarized chiral perturbation theory. We also discuss the applications of these form factors as mandatory inputs for low-energy phenomena, such as the semi-leptonic decays $B_s\to π^+π^-\ell^+\ell^-$ and the $τ$ lepton decay $τ\rightarrowπ^{-}π^{0}ν_τ$, in searches for physics beyond the Standard Model.
