High Energy Physics Research at the CMS Experiment

CMS 实验中的高能物理研究

• 批准号: 1806573
• 负责人: Salvatore Rappoccio
• 金额: $ 145万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1806573&HistoricalAwards=false
• 关键词: Energy; Physics; Research; CMS; Experiment

The Standard Model of particle physics has been a successful theory, agreeing with decades of experimental observations involving weak, electromagnetic, and strong interactions. The discovery of the Higgs boson at the LHC was further confirmation of this success. However, the Standard Model remains an incomplete theory. The precise measurements of the properties of the Higgs boson at the LHC could provide insight into new physics beyond the Standard Model. This research focuses on exploiting Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) to search for new particles, study the decay of Higgs bosons, carry out precision measurements of other Standard Model (SM) processes, use jet substructure to reconstruct high-momentum objects, and extend the capabilities of the CMS particle-tracking detector to increase its acceptance and tolerance to high collision rates. This research will search for subtle signatures of Beyond Standard Model (BSM) physics using advanced methods for identifying rare signals and addressing systematic uncertainties. These include detailed studies of the properties of the Higgs boson, extending the search program for BSM physics, and systematically improving techniques to maximize the physics potential. This research will also extend the capabilities of the CMS tracking detector to handle conditions at the High Luminosity LHC, extend its geometric coverage, and add tracking information to the far-forward particle flow algorithm. In addition, studies will be performed on the properties of highly Lorentz-boosted SM Higgs bosons decaying to bottom quark-antiquark pairs to fully explore the Higgs coupling to quarks, as well as to search for new phenomena in unexplored signatures at higher masses. This program will also develop and maintain object reconstruction for heavy- and light-flavor jets, as well as perform measurements of SM physics processes including production of W/Z/gamma in ssociation with heavy flavor jets, and detailed understanding of the quantum chromodynamic evolution of jets. This research activity will also foster collaboration with high school teachers and students through the QuarkNet and Science Olympiad outreach efforts, and foster female participation in STEM disciplines through the university's Women in Science and Engineering initiative.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

粒子物理学的标准模型是一个成功的理论，与几十年来涉及弱、电磁和强相互作用的实验观察相一致。在大型强子对撞机上发现希格斯玻色子进一步证实了这一成功。然而，标准模型仍然是一个不完整的理论。在大型强子对撞机上对希格斯玻色子性质的精确测量，可以为超越标准模型的新物理学提供洞见。本研究的重点是利用大型强子对撞机（LHC）的紧凑型介子螺杆管（CMS）实验来寻找新粒子，研究希格斯玻色子的衰变，对其他标准模型（SM）过程进行精确测量，利用射流子结构重建高动量物体，扩展CMS粒子跟踪探测器的能力，以提高其对高碰撞率的接受和容忍能力。这项研究将使用先进的方法来识别稀有信号和解决系统不确定性，寻找超越标准模型（BSM）物理的细微特征。其中包括对希格斯玻色子性质的详细研究，扩展BSM物理的搜索计划，以及系统地改进技术以最大限度地发挥物理潜力。本研究还将扩展CMS跟踪探测器的能力，以处理高亮度LHC的条件，扩展其几何覆盖范围，并在远前粒子流算法中添加跟踪信息。此外，还将研究高洛伦兹增强的SM希格斯玻色子衰变成底夸克-反夸克对的性质，以充分探索希格斯与夸克的耦合，并在更高质量的未探索特征中寻找新的现象。该项目还将开发和维护重味和轻味射流的物体重建，以及执行SM物理过程的测量，包括与重味射流相关的W/Z/ γ的产生，以及对射流量子色动力学演化的详细理解。这项研究活动还将通过QuarkNet和科学奥林匹克外展努力促进与高中教师和学生的合作，并通过大学的女性科学与工程计划促进女性参与STEM学科。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Explainable AI for ML jet taggers using expert variables and layerwise relevance propagation

使用专家变量和分层相关性传播的 ML jet 标记器的可解释 AI

• DOI: 10.1007/jhep05(2021)208
• 发表时间: 2021
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Agarwal, Garvita;Hay, Lauren;Iashvili, Ia;Mannix, Benjamin;McLean, Christine;Morris, Margaret;Rappoccio, Salvatore;Schubert, Ulrich
• 通讯作者: Schubert, Ulrich

The experimental status of direct searches for exotic physics beyond the standard model at the Large Hadron Collider

• DOI: 10.1016/j.revip.2018.100027
• 发表时间: 2018-10
• 期刊: Reviews in Physics
• 作者: S. Rappoccio

Measurements of the differential jet cross section as a function of the jet mass in dijet events from proton-proton collisions at s=13$$ \sqrt{s}=13 $$ TeV

• DOI: 10.1007/jhep11(2018)113
• 发表时间: 2018-07
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
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