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题名: New approach for detecting a compressed bino/wino at the LHC
作者: Han, CC;  Wu, L;  Yang, JM;  Zhang, MC;  Zhang, Y
刊名: PHYSICAL REVIEW D
出版日期: 2015
卷号: 91, 期号:5, 页码:55030
学科分类: Astronomy & Astrophysics ;  Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.91.055030
通讯作者: Han, CC (reprint author), Asia Pacific Ctr Theoret Phys, San 31, Pohang 790784, South Korea.
文章类型: Article
英文摘要: In some supersymmetric models like split supersymmetry or models with nonuniversal gaugino mass, 'bino [lightest sparticle (LSP)] and wino [next-to-lightest sparticle (NLSP)] may have rather small mass splitting in order to provide the correct dark matter relic density through bino/wino coannihilation. Such a scenario with the compressed bino/wino is difficult to explore at the LHC. In this work we propose to probe this scenario from pp -> j (chi) over tilde (0)(2)(chi) over tilde (+/-)(1) followed by (chi) over tilde (0)(2) -> gamma(chi) over tilde (0)(1) and (chi) over tilde (+/-)(1) -> W*(chi) over tilde (0)(1) -> l(+/-)nu(chi) over tilde (0)(1) (this method is also applicable to the compressed bino/Higgsino scenario). Through a detailed Monte Carlo simulation for both the signal and the backgrounds, we find that for a mass splitting Delta M similar to 10-15 GeV between bino (LSP) and wino (NLSP), the 14 TeV LHC with a luminosity of 1000 fb(-1) can probe the wino up to 150 GeV (the sensitivity can reach 3.4 sigma for Delta M = 10 GeV and 2 sigma for Delta M = 15 GeV). We also investigate the dark matter detection sensitivities for this scenario and find that the planned XENON-1T (2017) cannot fully cover the parameter space with a wino below 150 GeV allowed by relic density and the LUX limits.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: EVEN HIGGS BOSONS ;  DARK-MATTER ;  NEUTRALINO ;  MSSM ;  PROGRAM ;  PREDICTIONS ;  SEARCH ;  MASSES ;  SECTOR
收录类别: SCI
项目资助者: Korea Ministry of Education, Science and Technology (MEST) under the Young Scientist Training Program at the Asia Pacific Center for Theoretical Physics (APCTP) ;  Australian Research Council ;  National Natural Science Foundation of China (NNSFC) [11222548, 11305049, 11405047, 11275245, 10821504, 11135003] ;  Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21045
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Recommended Citation:
Han, CC,Wu, L,Yang, JM,et al. New approach for detecting a compressed bino/wino at the LHC[J]. PHYSICAL REVIEW D,2015,91(5):55030.
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