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

对 b->smumu 过程的非本地贡献以及数据对 sbcc 运算符的约束

• 批准号: 2876664
• 金额: --
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2876664
• 关键词: Non; local; contributions; smumu; processes

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.

稀有的b&gt；Smumu衰变主要来自SBCC四夸克算符的持久且难以量化的非局域贡献。作为该项目的一部分，我们将首先从实验测量中限制所述四夸克算符的威尔逊系数的潜在大小。我们的方法将涉及在类太空动量下计算四夸克算符和各种内插电流之间的一大组两点函数。测量到的强子B-K的振幅在类时动量的两点函数中产生极点。从类空区域外推到类时区域，我们将能够推断威尔逊系数的信息。接下来，我们将把所获得的信息转化为b&gt；smumu过程的理论预测。这样，我们就不会被迫承担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，包括离散界、算符乘积展开和贝叶斯统计领域的各种统计方法。