On the coverage of neutralino dark matter in coannihilations at the upgraded LHC

doi:10.1140/epjc/s10052-020-7793-1

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	On the coverage of neutralino dark matter in coannihilations at the upgraded LHC
	Abdughani, Murat 1,2; Wu, Lei
刊名	EUROPEAN PHYSICAL JOURNAL C
	2020
卷号	80 期号:3 页码:233
关键词	STAU COANNIHILATION SUSY PARTICLES PROGRAM REGION LIGHT MASS
ISSN号	1434-6044
DOI	10.1140/epjc/s10052-020-7793-1
英文摘要	In the supersymmetric models, the coannihilation of the neutralino DM with a lighter supersymmetric particle provides a feasible way to accommodate the observed cosmological DM relic density. Such a mechanism predicts a compressed spectrum of the neutralino DM and its coannihilating partner, which results in the soft final states and makes the searches for sparticles challenging at colliders. On the other hand, the abundance of the freeze-out neutralino DM usually increases as the DM mass becomes heavier. This implies an upper bound on the mass of the neutralino DM. Given these observations, we explore the HE-LHC coverage of the neutralino DM for the coannihilations. By analyzing the events of the multijet with the missing transverse energy (E-T(miss)), the monojet, the soft lepton pair plus E-T(miss), and the monojet plus a hadronic tau, we find that the neutralino DM mass can be excluded up to 2.6, 1.7 and 0.8 TeV in the gluino, stop and wino coannihilations at the 2 sigma level, respectively. However, there is still no sensitivity of the neutralino DM in stau coannihilation at the HE-LHC, due to the small cross section of the direct stau pair production and the low tagging efficiency of soft tau from the stau decay.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27049]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 2.Nanjing Normal Univ, Inst Theoret Phys, Dept Phys, Nanjing 210023, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Abdughani, Murat,Wu, Lei. On the coverage of neutralino dark matter in coannihilations at the upgraded LHC[J]. EUROPEAN PHYSICAL JOURNAL C,2020,80(3):233.
APA	Abdughani, Murat,&Wu, Lei.(2020).On the coverage of neutralino dark matter in coannihilations at the upgraded LHC.EUROPEAN PHYSICAL JOURNAL C,80(3),233.
MLA	Abdughani, Murat,et al."On the coverage of neutralino dark matter in coannihilations at the upgraded LHC".EUROPEAN PHYSICAL JOURNAL C 80.3(2020):233.