Light gravitino dark matter: LHC searches and the Hubble tension

被引：22
作者：
Gu, Yuchao [1 ,2 ,3 ]
Khlopov, Maxim [4 ,5 ,6 ,7 ]
Wu, Lei [1 ,2 ]
Yang, Jin Min [8 ,9 ,10 ]
Zhu, Bin [3 ,11 ]
机构：
[1] Nanjing Normal Univ, Dept Phys, Nanjing 210023, Peoples R China
[2] Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210023, Peoples R China
[3] Yantai Univ, Sch Phys, Yantai 264005, Peoples R China
[4] Univ Paris, CNRS, Astroparticule & Cosmol, F-75013 Paris, France
[5] Ctr Cosmoparticle Phys Cosm, Kashirskoe Shosse 31, Moscow 115409, Russia
[6] Natl Res Nucl Univ MEPHI, Moscow Engn Phys Inst, Kashirskoe Shosse 31, Moscow 115409, Russia
[7] Southern Fed Univ, Inst Phys, Stachki 194, Rostov Na Donu 344090, Russia
[8] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
[9] Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
[10] Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
[11] Chung Ang Univ, Dept Phys, Seoul 06974, South Korea
来源：
PHYSICAL REVIEW D | 2020年 / 102卷 / 11期
基金：
新加坡国家研究基金会; 中国国家自然科学基金;
关键词：
COSMOLOGICAL CONSTRAINTS; POWER SPECTRA; SUPERSYMMETRY; PHYSICS;
D O I：
10.1103/PhysRevD.102.115005
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The recent measurements of the cosmological parameter H-0 from the direct local observations and the inferred value from the cosmic microwave background show approximately 4 sigma discrepancy. This may indicate new physics beyond the standard ACDM. We investigate the keV gravitino dark matter that has a small fraction of nonthermal components (e.g., from the late decay of next-to-lightest-supersymmetric-particle bino) under various cosmological constraints. We find such a scenario is highly predictive and can be tested by searching for the dilepton plus missing energy events at the LHC. Besides, we also discuss its implication for Hubble tension, which can be reduced to 3 sigma level marginally.
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页数：6
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