运动NRQCD action和重-轻算符的辐射修正
Radiative corrections to the m(oving)NRQCD action and heavy-light operators
摘要：
B介子的稀有衰变，如B \to K^*γ和B \to K^{（*）} \ell^+ \ell^-，在标准模型中被圈抑制，并且对新物理敏感。在大反冲的重-轻衰变中，末态介子在衰变介子的静止坐标系中具有相当大的动量。为了减少由此产生的离散误差，我们制定了非相对论性重夸克作用在一个移动的框架。我们讨论了首阶重-轻算符的微扰重正化问题，即m（oving）NRQCD理论。我们还提出了辐射修正的NRQCD行动使用自动晶格微扰理论计算。通过将该技术与理论的弱耦合区域中的高β模拟相结合，可以非常有效地计算高阶回路校正。
英文摘要：
Rare decays of B mesons, such as B \to K^*γand B\to K^{(*)}\ell^+\ell^- are loop suppressed in the Standard Model and sensitive to new physics. The final state meson in heavy-light decays at large recoil has sizeable momentum in the rest frame of the decaying meson. To reduce the resulting discretization errors we formulate the nonrelativistic heavy quark action in a moving frame. We discuss the perturbative renormalization of the leading order heavy-light operators in the resulting theory which is known as m(oving)NRQCD. We also present radiative corrections to the NRQCD action computed using automated lattice perturbation theory. By combining this technique with high-beta simulations in the weak coupling regime of the theory higher order loop corrections can be calculated very efficiently.
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