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

罕见的b->smumu衰变受到持续且难以量化的非局部贡献的影响，这些贡献主要来自sbcc四夸克算子。作为该项目的一部分，我们将首先从实验测量中约束上述四夸克算子的威尔逊系数的潜在大小。我们的方法将涉及计算在四夸克算子和各种空间动量内插电流之间的大量两点函数。强子B- >k调和子的测量振幅在类时动量的两点函数中产生了极点。从类空间区域向类时间区域外推，我们将能够推断出威尔逊系数的信息。接下来，我们将把获得的信息转化为b->smumu过程的理论预测。这样，我们就不会被迫假设四夸克算子对标准模型的贡献。这将消除理论预测中难以量化的系统性不确定性。整个项目将使用多种方法，包括色散界、算子积展开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.