Theory and Phenomenology of New Particles in the Standard Model and Beyond

标准模型及其他模型中新粒子的理论和现象学

• 批准号: SAPIN-2015-00038
• 负责人: Steele, Thomas
• 金额: $ 2.67万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=665872
• 关键词: Theory; Phenomenology; New; Particles; Standard

The landmark discovery of the Higgs boson by the ATLAS and CMS collaborations at the Large Hadron Collider (LHC) are accompanied by exciting hadronic physics discoveries by LHCb on the charmonium-like XYZ hadronic states (e.g., the recent confirmation of the charged Z(4430) state). These LHC experimental collaborations illustrate the main two themes of my research program: theoretical studies of the Higgs sector and exotic hadrons. ***In electroweak symmetry breaking mechanisms with classically scale-invariant Higgs sectors, the Higgs mechanism emerges from the quantum corrections to the effective potential (i.e. the Coleman-Weinberg mechanism). In this approach, the experimentally observed 125 GeV Higgs mass can be accommodated in these scale-invariant models by a large Higgs self-coupling solution, and the small mass scale of the Higgs boson is attributed to a custodial classical scale-invariance symmetry.  With the inclusion of a Higgs portal interaction, extensions of this mechanism beyond the Standard Model  provides a natural scenario for cosmologically-stable dark matter. ***My proposed research includes exploration of classically scale-invariant extensions of the Higgs sector to two-doublet models, and to hidden sector dark-matter models with Higgs portal interactions. The purpose of this program is to provide predictions from these scenarios that can help interpret future experimental results emerging from the LHC, new Higgs experimental programs, and dark matter searches. The eventual measurement of the Higgs self-coupling will be particularly important, because it is one of the striking signals of the scale-invariant Higgs mechanism.***Another exciting area in particle physics are the intriguing observations of the charmonium-like XYZ mesons that challenge our concepts of conventional quark-antiquark models of mesons. The Zc(3900) observed by BESIII and Belle along with the Zc(4430) observed by Belle and confirmed by LHCb are the most striking examples, because their minimal quark content requires a tetraquark configuration. ***My proposed research includes study of QCD exotica; states that go beyond conventional quark-antiquark  models of mesons.  QCD sum-rule methods will be used to study the mass spectrum  and decay decay modes of the Zc states, with a goal of distinguishing between competing interpretations for these states.  A comprehensive QCD sum-rule study of the spin-zero and spin-one light and heavy-light hybrids (states composed of a quark, antiquark, and gluonic excitation) with conventional and exotic JPC will be conducted, with a goal of identifying overall supermultiplet patterns and  mass hierarchies to aid in the interpretation of the upcoming GlueX and PANDA experiments.*** Thus my research program will advance knowledge of new particles in the Standard Model (Higgs, exotic hadronic states) and  beyond the Standard Model (dark matter).*****

大型强子对撞机（LHC）在Atlas和CMS合作中对Higgs Boson的具有里程碑意义的发现，并伴随着L​​HCB在类似Charmium的XYZ HADRONEC State上的激动人心的HADRONIC物理学发现（例如，最近对被指控的Z（4430）州证实。这些LHC实验合作说明了我的研究计划的主要两个主题：希格斯部门和异国黑人的理论研究。 ***在具有经典尺度不变的Higgs领域的电动对称性破坏机制中，HIGGS机制从量子校正到有效电位（即Coleman-Weinberg机制）。在这种方法中，实验观察到的125个GEV Higgs质量可以通过大型Higgs自耦合解决方案来容纳这些规模不变的模型，而Higgs Boson的较小质量尺度归因于保管经典规模不变的对称性。随着HIGGS门户相互作用的包含，该机制的扩展超出了标准模型，为宇宙学稳定的暗物质提供了一种自然场景。 ***我提出的研究包括探索希格斯扇区对两双模型的经典规模不变扩展，以及与Higgs门户相互作用的隐藏扇区深色模型。该计划的目的是从这些方案中提供预测，这些预测可以帮助解释LHC，New Higgs实验程序和暗物质搜索的未来实验结果。希格斯自我耦合的事件测量尤其重要，因为它是尺度不变的希格斯机制的引人注目的信号之一。 BESIII和Belle与Belle观察到并由LHCB确认的ZC（3900）是最引人注目的例子，因为它们的最小夸克含量需要四夸克构型。 ***我提出的研究包括对QCD Exotica的研究；规定超越了传统的媒体媒体模型的介体模型。 QCD总规则方法将用于研究ZC状态的质谱和衰减模式，其目的是对这些状态进行竞争。将进行一项全面的QCD总和研究，对零旋转和重型轻便的杂种（由夸克，古夸克和麸质兴奋组成的状态（由常规和异国情调的JPC组成），其目的将进行，目的是确定超级超级层次的整体模式和大规模层次的研究，以帮助对以下gluex和panda的研究来识别我的研究。标准模型中的颗粒（希格斯，外来的忍者状态），超出标准模型（暗物质）。****