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格点QCD在介子衰变辐射修正中的应用

Aug 10, 2022, 7:36 PM
6m

Speaker

Mr Pengxiang Ma (Peking University)

Description

$\gamma W$ -box图修正是电弱辐射修正中对强子尺度敏感的唯一项, 且对强子尺度敏感. 我们组将格点QCD引入$\pi$介子的辐射衰变修正计算中, 在计算中结合格点理论和微扰论, 将理论计算的不确定度降低为原来的1/3. 此外, 这一计算方案还可以在味SU(3)极限下推广到K介子衰变的辐射修正的计算中. 结合手征微扰论, 我们的计算方案可以给出又良好不确定度估计的低能有效常数的结果.

Primary author

Mr Pengxiang Ma (Peking University)

Presentation materials