Invisible and semi-invisible decays of bottom baryons* * The work is partly Supported by the National Key Research and Development Program of China (2020YFA0406400, 2023YFA1606000), and the National Natural Science Foundation of China (12335003, 12275277)

IF 3.6 2区物理与天体物理 Q1 PHYSICS, NUCLEAR

中国物理C Pub Date : 2024-08-01 DOI:10.1088/1674-1137/ad4afa

Yong Zheng, Jian-Nan Ding, Dong-Hao Li, Lei-Yi Li, Cai-Dian Lü, Fu-Sheng Yu

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引用次数: 0

Abstract

The similar densities of dark matter and baryons in the universe imply that they may arise from the same ultraviolet model. B-Mesogenesis, which assumes dark matter is charged under the baryon number, attempts to simultaneously explain the origin of baryon asymmetry and dark matter in the universe. In particular, B-Mesogenesis may induce bottom-baryon decays into invisible or semi-invisible final states, which provide a distinctive signal for probing this scenario. In this work, we systematically study the invisible decays of bottom baryons into dark matter and the semi-invisible decays of bottom baryons into a meson or a photon together with a dark matter particle. In particular, the fully invisible decay can reveal the stable particles in B-Mesogenesis. Some QCD-based frameworks are used to calculate the hadronic matrix elements under the B-Mesogenesis model. We estimate the constraints on the Wilson coefficients or the product of some new physics couplings with the Wilson coefficients according to the semi-invisible and invisible decays of bottom baryons detectable at future colliders.

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底重子的隐形和半隐形衰变* * 本研究得到国家重点研发计划（2020YFA0406400，2023YFA1606000）和国家自然科学基金（12335003，12275277）的部分资助。

宇宙中暗物质和重子的密度相似，这意味着它们可能产生于同一个紫外线模型。B-Mesogenesis 假设暗物质在重子数下带电，试图同时解释宇宙中重子不对称和暗物质的起源。特别是，B-介子发生可能诱导底重子衰变为不可见或半不可见的终态，这为探测这种情况提供了一个独特的信号。在这项工作中，我们系统地研究了底重子向暗物质的不可见衰变，以及底重子与暗物质粒子一起向介子或光子的半不可见衰变。特别是完全不可见衰变可以揭示B-介子发生过程中的稳定粒子。一些基于 QCD 的框架被用来计算 B-Mesogenesis 模型下的强子矩阵元素。我们根据在未来对撞机上可探测到的底重子的半隐形和隐形衰变来估计威尔逊系数的约束或一些新物理耦合与威尔逊系数的乘积。

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来源期刊

中国物理C 物理-物理：核物理

CiteScore

6.50

自引率

8.30%

发文量

8976

审稿时长

1.3 months

期刊介绍： Chinese Physics C covers the latest developments and achievements in the theory, experiment and applications of: Particle physics; Nuclear physics; Particle and nuclear astrophysics; Cosmology; Accelerator physics. The journal publishes original research papers, letters and reviews. The Letters section covers short reports on the latest important scientific results, published as quickly as possible. Such breakthrough research articles are a high priority for publication. The Editorial Board is composed of about fifty distinguished physicists, who are responsible for the review of submitted papers and who ensure the scientific quality of the journal. The journal has been awarded the Chinese Academy of Sciences ‘Excellent Journal’ award multiple times, and is recognized as one of China''s top one hundred key scientific periodicals by the General Administration of News and Publications.