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arXiv 1609.07413hep-ph
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四体Dalitz图对K_{l3} ^0衰变辐射修正的贡献及其在确定|V_{us}|

Four-body Dalitz plot contribution to the radiative corrections in K_{l3}^0 decays and its role in the determination of |V_{us}|

M. Neri, A. Martinez, C. Juarez-Leon, J. J. Torres, Ruben Flores-Mendieta

摘要:

计算了模型无关辐射修正对中性K介子半轻子衰变Dalitz图的四体贡献,其量级为(α/π)(q/M_1),其中q为动量传递,M_1为K介子质量。最终结果以两种形式呈现。第一个是在三重积分的韧致辐射光子准备进行数值计算;第二个是一个完全解析表达式。本文的组织,使其访问和可靠的精度实验涉及K介子的Dalitz图的分析,并不妥协,以固定在预定值的形状因子。作为一个副产品,收集三体和四体辐射修正的贡献,通过对测量的K介子衰变率的最小二乘拟合,得到f_+^{K^0π^-}| V_{us}| = 0.2168(3).

英文摘要:

The four-body contribution of the model-independent radiative corrections to the Dalitz plot of the semileptonic decays of neutral kaons are computed to order (α/π)(q/M_1), where q is the momentum transfer and M_1 is the kaon mass. The final result is presented in two forms. The first one is given in terms of the triple integration of the bremsstrahlung photon ready to be performed numerically; the second one is a fully analytical expression. This paper is organized to make it accessible and reliable in the analysis of the Dalitz plot of precision experiments involving kaons and is not compromised to fixing the form factors at predetermined values. As a byproduct, gathering together three- and four-body contributions of radiative corrections yields, through a least-squares fit to the measured kaon decay rates, the value f_+^{K^0π^-}|V_{us}| = 0.2168(3).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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