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Abdughani, Murat1,2; Wu, Lei
On the coverage of neutralino dark matter in coannihilations at the upgraded LHC
Source PublicationEUROPEAN PHYSICAL JOURNAL C
Language英语
KeywordSTAU COANNIHILATION SUSY PARTICLES PROGRAM REGION LIGHT MASS
AbstractIn 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.
2020
ISSN1434-6044
Volume80Issue:3Pages:233
Cooperation Status国内
Subject AreaPhysics
MOST Discipline CataloguePhysics, Particles & Fields
DOI10.1140/epjc/s10052-020-7793-1
Indexed BySCIE
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27049
CollectionSCI期刊论文
Affiliation1.Nanjing Normal Univ, Inst Theoret Phys, Dept Phys, Nanjing 210023, Peoples R China
2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
Recommended Citation
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.
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