Non-local contributions to b->smumu processes and constraints on sbcc operators from data

罕见的B->smumu衰变受到持续的和难以量化的非局域贡献，主要来自sbcc四夸克算符。我们的方法将涉及计算一个大的两点函数之间的四夸克运营商和各种各样的插值电流在类空动量。强子B->K粲偶素的振幅在类时动量的两点函数中产生极点。从类空到类时区域的外推，我们将能够推断出Wilson系数的信息，接下来，我们将把得到的信息转化为B->smumu过程的理论预言。这样，我们就不会被迫假设四夸克算符的标准模型贡献。这将从理论预测中消除难以量化的系统不确定性。整个项目将使用各种方法，包括分散界限，算子乘积扩展和贝叶斯统计领域的各种统计方法。

Rare b->smumu decays suffer from persistent and hard-to-quantify non-local contributions that arise primarily from sbcc four-quark operators.As part of this project, we will first constrain the potential size of the Wilson coefficients of said four-quark operators from experimental measurements. Our approach will involve computing a large set of two-point functions between the four-quark operators and a variety of interpolating currents at spacelike momenta. The measured amplitudes of hadronic B->K charmonium give rise to poles in the two-point functions at timelike momenta. Extrapolating from the spacelike to the timelike region, we will be able to infer information on the Wilson coefficients.Next, we will transfer the information obtained to theory predictions of b->smumu processes. In this way, we will not be forced to assume Standard-Model-like contributions by the four-quark operators. This will remove a hardly quantifiable systematic uncertainty from the theory predictions.The overall project will make use of a variety of methods, including dispersive bounds, operator-product expansions, and a variety of statistical methods from the field of Bayesian statistics.