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研究生: 詹大衛
Chan, Ta-Wei
論文名稱: 隱區連續體暗物質
Secluded Continuum Dark Matter
指導教授: 張嘉泓
Chang, Chia-Hung
口試委員: 阮自強
Yuan, Tzu-Chiang
陳傳仁
Chen, Chuan-Ren
張嘉泓
Chang, Chia-Hung
口試日期: 2023/06/28
學位類別: 碩士
Master
系所名稱: 物理學系
Department of Physics
論文出版年: 2023
畢業學年度: 111
語文別: 英文
論文頁數: 21
中文關鍵詞: 暗物質
英文關鍵詞: dark matter, continuum, secluded sector
研究方法: 現象學
DOI URL: http://doi.org/10.6345/NTNU202300661
論文種類: 學術論文
相關次數: 點閱:67下載:8
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  • We study the possibility of the gapped continuum dark matter(DM) in a hidden sector scenario. The focus of our study is to extend the idea of Weak Interacting Continuum WIC DM to the model of dark vector portal. We elevate a dark U(1)′ charged DM in the hidden sector to continuum status. The U(1)′ gauge boson is mixed with SM U(1) gauge boson to form a dark photon. Dark photon exchange provide a viable portal s-channel interaction that drives the freeze out mechanism, very similar to the original weakly-interacting continuum (WIC) model, but with the option to adjust the mediating dark photon mass. We calculate possible parameters in GeV and sub-GeV ranges that could generate the correct DM relic density and compare to some of the constraints.

    1. Introduction 1 2. Continuum DM 1 2.1 Continuum Field Theory and Continuum DM gas in Equilibrium 1 2.2 The freeze out process and Boltzmann equation for continuum DM 3 2.3 Decays and elastic scattering of Continuum DM after Freeze Out 7 2.4 Weak Interacting Continuum (WIC), a concrete model with Z-portal 8 3 Relic Density Calculation 9 3.1 Cross Section calculation 10 3.2 Analytically solving Boltzmann equation, approximately 10 4 Secluded continuum DM 14 4.1 Secluded DM 14 4.2 Dark photon portal 15 4.3 Continuum DM with dark photon 16 4.4 GeV scale Secluded DM 17 4.5 Sub-GeV Secluded DM 18 5 Conclusion 19 References 20

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