Probing Dark Sector Physics in Collider and Cosmology

探索对撞机和宇宙学中的暗区物理

• 批准号: 2014165
• 负责人: Yuhsin Tsai
• 金额: $ 7万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2014165&HistoricalAwards=false
• 关键词: Probing; Dark; Sector; Physics; Collider

This award funds the research activities of Professor Yuhsin Tsai at the University of Notre Dame.Imagine the possibility that there is another "hidden" world that coexists with ours in the same space and time, but which is practically invisible to us because the interactions between the hidden world and ours are very weak. While this may sound like science fiction, recent developments in particle physics and cosmology have shown that an invisible sector of the universe might actually exist. Indeed, the existence of such a hidden sector would help explain several long-standing theoretical and observational puzzles. Professor Tsai’s research is aimed at using gravitational waves, early-time cosmology, and high-energy particle colliders (such as the Large Hadron Collider) to uncover such hidden worlds. As such, this research advances the national interest by promoting the progress of science in the discovery of new physical laws and new components of the natural world. This work will also have several broader impacts. The results of this work will not only guide future experiments and technology development, but also involve graduate students and postdocs, thereby providing critical training for junior physicists beginning research in this field. Professor Tsai also intends to give public lectures on his research results and help to develop outreach programs for high-school students.More technically, Professor Tsai will study energy perturbations in the stochastic gravitational-wave background. He will also study the size of non-Gaussian signatures of the gravitational-wave signal produced by the hidden particles in the early universe. The result of this analysis will help in the identification of the gravitational-wave detectors that can observe the energy fluctuations from the hidden world that interacts with us solely through gravity. Professor Tsai will also study the cosmological signatures of models that address the Higgs hierarchy problem, such as the Mirror Twin Higgs model and the N-Naturalness model. Based on the idea that these scenarios can produce acoustic oscillations between hidden particles, we can study these model through the changes they induce for gravity perturbations in the early universe. Exploiting the current and the expected future sensitivity of the LHCb experiment, Prof. Tsai will also develop new ways to study the signature of long-lived particles that couple not only to regular matter but also to particles in the hidden world.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.

该奖项为巴黎圣母院大学的Yuhsin Tsai教授的研究活动提供了资金。想象一下，有另一个“隐藏”世界与我们的世界共存在同一时空和时间上，但实际上对我们来说是看不见的，因为隐藏世界之间的互动非常薄弱。尽管这听起来像是科幻小说，但粒子物理和宇宙学方面的最新发展表明，宇宙的一个看不见的部门实际上可能存在。确实，这种隐藏的部门的存在将有助于解释几个长期的理论和观察性拼图。 Tsai教授的研究旨在使用引力波，早期宇宙学和高能量粒子山脉（例如大型强子对撞机）来揭示这种隐藏的世界。因此，这项研究通过在发现新的物理定律和自然界的新组成部分中促进科学的进步来推动国家利益。这项工作还将产生更广泛的影响。这项工作的结果不仅将指导未来的实验和技术开发，而且还涉及研究生和博士后，从而为初级物理学家提供了重要的培训，开始研究该领域的研究。 Tsai教授还打算就其研究结果进行公开讲座，并有助于为高中生开发外展计划。从技术上讲，Tsai教授将研究随机重力波动的能量扰动。他还将研究早期宇宙中隐藏颗粒产生的重力波信号的非高斯信号的大小。该分析的结果将有助于识别引力波检测器，这些检测器可以观察到仅通过重力与我们相互作用的隐藏世界的能量波动。 Tsai教授还将研究解决Higgs层次结构问题的模型的宇宙学特征，例如Mirror Twin Higgs模型和N-NATALENS模型。基于这些场景可以在隐藏粒子之间产生声学振荡的想法，我们可以通过它们引起的重力扰动的变化来研究这些模型。 Tsai教授还将利用LHCB实验的当前和预期未来敏感性，还将开发新的方法来研究长寿颗粒的签名，这些颗粒不仅与规律性有关，而且对隐藏世界中的粒子也是如此。这项奖项反映了NSF的法定任务，并通过使用基金会的知识优点和广泛的影响来评估NSF的法定任务，并通过评估来获得珍贵的支持。

项目成果

B modes from postinflationary gravitational waves sourced by axionic instabilities at cosmic reionization

来自宇宙再电离轴子不稳定性的膨胀后引力波的 B 模式

• DOI: 10.1103/physrevd.104.083517
• 发表时间: 2021
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Geller, Michael;Lu, Sida;Tsai, Yuhsin
• 通讯作者: Tsai, Yuhsin

Non-Gaussian stochastic gravitational waves from phase transitions

• DOI: 10.1007/jhep11(2021)107
• 发表时间: 2021-02
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Soubhik Kumar;R. Sundrum;Yuhsin Tsai

Free-streaming and coupled dark radiation isocurvature perturbations: constraints and application to the Hubble tension

自由流和耦合暗辐射等曲率扰动：哈勃张力的约束和应用

• DOI: 10.1088/1475-7516/2022/05/014
• 发表时间: 2022
• 期刊: Journal of Cosmology and Astroparticle Physics
• 影响因子: 6.4
• 作者: Ghosh, Subhajit;Kumar, Soubhik;Tsai, Yuhsin
• 通讯作者: Tsai, Yuhsin

Cosmological particle production and pairwise hotspots on the CMB

宇宙学粒子的产生和 CMB 上的成对热点

• DOI: 10.1007/jhep11(2021)158
• 发表时间: 2021
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Kim, Jeong Han;Kumar, Soubhik;Martin, Adam;Tsai, Yuhsin
• 通讯作者: Tsai, Yuhsin

Unleashing the full power of LHCb to probe stealth new physics

• DOI: 10.1088/1361-6633/ac4649
• 发表时间: 2021-05
• 期刊: Reports on Progress in Physics
• 影响因子: 18.1
• 作者: M. Borsato;X. C. Vidal;Yuhsin Tsai;C. Sierra;J. Zurita;G. Alonso-Álvarez;A. Boyarsky;Alexandre Brea Rodr'iguez;D. B. Franzosi;G. Cacciapaglia;A. Vidal;M. Du;Gilly Elor;M. Escudero;G. Ferretti;T. Flacke;P. Foldenauer;Jan Hajer;L. Henry;P. Ilten;J. Kamenik;B. Jashal;S. Knapen;F. Redi;M. Low;Zuowei Liu;A. O. Campos;E. Polycarpo;M. Ramos;M. R. Pernas;E. Salvioni;M. Rangel;R. Schafer;L. Sestini;Y. Soreq;V. Tran;I. Timiryasov;M. Veghel;S. Westhoff;Michael Williams;J. Zupan