Elementary particles at colliders and in astrophysics

对撞机和天体物理学中的基本粒子

• 批准号: 0653354
• 负责人: George Sterman
• 金额: --
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-11-15 至 2010-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0653354&HistoricalAwards=false
• 关键词: Elementary; particles; colliders; astrophysics

This project involves the theory and phenomenology of experiments at the upcoming Large Hadron Collider (LHC), and of observations in astrophysics and cosmology that search for physics beyond the current Standard Model (SM) of elementary particles and forces. The project will involve the study of many aspects of the only ultra-heavy quark, the top. Because of its special features, such as the accessibility of its spin and charge information, its large mass and linkage to EW symmetry breaking, it is expected to be very useful in analyzing signals of SM extensions at the LHC. At the astroparticle physics and cosmology frontier, there are many additional issues, which will be studied, including dark matter searches and the LHC reach for direct observation of a dark matter candidate, neutrino physics in the context of late neutrino masses, weak scale leptogenesis and observation of relic supernova neutrinos. The proposed collider physics program is related to the detailed study of the top quark properties, and includes interesting and promising methods to extract information about new physics. Another aspect of the proposal is phenomenological studies of warped extra dimensional scenarios. The PI will study the phenomenological implications of Kaluza Klein (KK) (small compact extra dimensional) gluons, decaying mostly into top-quark pairs, and KK gravitons, decaying prominently into longitudinal gauge bosons. The emphasis will be on a proposed method to differentiate between SUSY and universal extra dimension scenarios. There is also a proposal to use the diffuse anti-neutrino flux from core-collapse supernovae to extract cosmological parameters. Another proposed investigation is a study of minimal flavor violating models, as well as of the properties of what the PI calls NMFV, by exploring the LHCb physics results could shed light on the origin of flavor and put strong constraints on a large class of models.

该项目涉及即将到来的大型强子对撞机（LHC）实验的理论和现象学，以及天体物理学和宇宙学的观测，这些观测旨在寻找超越当前基本粒子和力的标准模型（SM）的物理学。该项目将涉及研究唯一的超重夸克，顶夸克的许多方面。由于其特殊的功能，如它的自旋和电荷信息的可访问性，它的大质量和链接到EW对称性破缺，预计将是非常有用的在LHC的SM扩展的信号分析。在天体粒子物理学和宇宙学前沿，还有许多其他问题将被研究，包括暗物质搜索和LHC直接观测暗物质候选者，晚中微子质量背景下的中微子物理学，弱尺度leptogenesis和遗迹超新星中微子的观测。拟议中的对撞机物理计划与顶夸克性质的详细研究有关，并包括提取新物理信息的有趣和有前途的方法。该提案的另一个方面是对扭曲的额外维度场景的现象学研究。PI将研究Kaluza Klein（KK）（小型紧凑额外维度）胶子的现象学意义，主要衰减为顶夸克对，以及KK引力子，主要衰减为纵向规范玻色子。重点将是一个建议的方法来区分超对称性和普遍额外的维的情况。还有一个建议是利用来自核心坍缩超新星的扩散反中微子通量来提取宇宙学参数。另一项研究建议是研究最小味道违反模型，以及PI称之为NMFV的性质，通过探索LHCb物理结果可以揭示味道的起源，并对一大类模型施加强有力的约束。