论文标题
Pion引起的辐射校正中子β-末期
Pion-induced radiative corrections to neutron beta-decay
论文作者
论文摘要
我们使用低能量的HADRONIC有效场理论计算了电磁校正为中子β衰变。我们识别并计算由先前研究中错过的虚拟旋转产生的新的辐射校正。最大的校正是核子轴向电荷的百分比变化，与Pion-Mass分裂的电磁部分成比例。较小的校正，可与预期的实验精度相当，会影响$β$ - $ν$角相关性和$β$ - 米对称性。我们评论结果对实验测量的轴向电荷与使用晶格QCD进行的第一原则计算的含义以及$β$ - 订单实验的潜力，以限制超越标准模式相互作用的限制。
We compute the electromagnetic corrections to neutron beta decay using a low-energy hadronic effective field theory. We identify and compute new radiative corrections arising from virtual pions that were missed in previous studies. The largest correction is a percent-level shift in the axial charge of the nucleon proportional to the electromagnetic part of the pion-mass splitting. Smaller corrections, comparable to anticipated experimental precision, impact the $β$-$ν$ angular correlations and the $β$-asymmetry. We comment on implications of our results for the comparison of the experimentally measured axial charge with first-principle computations using lattice QCD and on the potential of $β$-decay experiments to constrain beyond-the-Standard-Model interactions.
