We perform a matching of the two loop-chiral perturbation theory representation of the scalar K pi form factor to a dispersive one. Knowing the value of F-K/F-pi and f(+)(0) in the Standard Model (SM) allows to determine two O(P-6) LECs, the slope of the scalar form factor and the deviation of the Callan-Treiman theorem. Going beyond the SM and assuming the knowledge of the slope of the scalar form factor from experiment, the matching allows us to determine the ratio of F-K/F-pi, f(+)(0), a certain combination of non-standard couplings, the deviation of the Callan-Treiman theorem and the two O(p(6)) LECs. (C) 2008 Elsevier B.V. All rights reserved.
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机译：我们将标量 K pi 形状因子的两个环手性微扰理论表示与色散因子进行匹配。知道标准模型 （SM） 中 F-K/F-pi 和 f（+）（0） 的值可以确定两个 O（P-6） LEC、标量形状因子的斜率和 Callan-Treiman 定理的偏差。超越 SM 并假设从实验中了解标量外形因子的斜率，匹配使我们能够确定 F-K/F-pi、f（+）（0）、非标准耦合的某种组合、Callan-Treiman 定理和两个 O（p（6）） LEC 的偏差。（C） 2008 Elsevier B.V.保留所有权利。
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