The flavour of New Physics in the loops of hadronic beauty decays

新物理学的味道在强子之美的循环中逐渐衰退

基本信息

批准号：
EP/X014746/2
负责人：
Matthew Kenzie
金额：
$ 160.55万
依托单位：
University of Cambridge
依托单位国家：
英国
项目类别：
Research Grant
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=EP%2FX014746%2F2
关键词：
flavour New Physics loops hadronic

项目摘要

The Standard Model (SM) of Particle Physics, whilst incredibly successfully, is known not to provide anadequate description for various observed physical phenomena. Precision measurements in the flavoursector are an ideal laboratory to search for New Physics (NP) beyond the SM at very high energy scales.This proposal will make precise measurements of highly NP sensitive decay rate ratios and weak phases,which arise in beauty-quark to strange- or down-quark transitions, using data collected at the LargeHadron Collider beauty (LHCb) experiment.The weak phase under consideration, called phi-s, has a very small and precisely known value in the SMmaking its determination a prime avenue for exploration of NP. However, interpretation of the experimentalmeasurement, within the framework of the SM, is complicated by unknown polluting contributions. Thisissue is overcome in this proposal using a novel analysis technique, which simultaneously extracts theunknown contribution by exploiting flavour symmetries that are known to hold for the decays under study.This proposal will make the world's first precision measurement of phi-s using this analysis method.A family of seven inter-related decay modes of neutral B-mesons to hadrons, via vector-vector states, willbe investigated. Beyond extraction of the weak phase, phi-s, understanding of the complex amplitudestructure of these decays will provide insights into the role of New Physics in their decay dynamics. Thisproposal will make world's first and world's most precise measurements of various compelling decay rateparameters and phases which probe the fundamental nature of these processes.During the timeline of this proposal the available datasets will increase by a factor of forty and theproject will deliver cutting-edge developments in analysis techniques and software tools. The outcome isa step-change in the physics reach, which will permit these precision measurements to be made for thefirst time.

粒子物理学的标准模型（SM）虽然非常成功，但已知不为各种观察到的物理现象提供厌食的描述。口号的精确测量是在非常高的能量尺度上寻找新物理（NP）的理想实验室。该提案将精确测量高度NP敏感的衰减率和弱相，在美容范围内对奇怪或下降的过渡产生，使用在大型或下降的过渡中，使用了较大的数据，该数据在较大的范围内被称为“较大的阶段”。在确定其探索NP的主要途径中，它的确定途径很小且精确地为已知的价值。但是，在SM的框架内对实验测量的解释使未知的污染贡献变得复杂。在本提案中使用新颖的分析技术克服了这一问题，该技术通过利用风味对称性来提取未知的贡献，这些贡献已知，这些风味对称性符合所研究的衰减。该提案将使用此分析方法对世界的第一个精确度量进行PHI-S的测量。除了提取弱相，PHI-S，对这些衰减的复杂振幅的理解将提供有关新物理学在其衰减动力学中的作用的见解。这种普罗帕萨尔将使世界上第一个也是世界上最精确的测量值对各种引人注目的衰减速率参数和阶段，这些阶段探测了这些过程的基本性质。在该提案的时间表中，可用数据集的时间表将增加40倍，而Promoject将在分析技术和软件工具中提供最新的开发项目。物理范围内的ISA逐步变化，这将允许第一次进行这些精确测量。