New approach for detecting a compressed bino/wino at the LHC

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	New approach for detecting a compressed bino/wino at the LHC
	Han, CC; Wu, L; Yang, JM; Zhang, MC; Zhang, Y
刊名	PHYSICAL REVIEW D
	2015
卷号	91 期号:5 页码:55030
通讯作者	Han, CC (reprint author), Asia Pacific Ctr Theoret Phys, San 31, Pohang 790784, South Korea.
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.
学科主题	Astronomy & Astrophysics ; Physics
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
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21045]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	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.
APA	Han, CC,Wu, L,Yang, JM,Zhang, MC,&Zhang, Y.(2015).New approach for detecting a compressed bino/wino at the LHC.PHYSICAL REVIEW D,91(5),55030.
MLA	Han, CC,et al."New approach for detecting a compressed bino/wino at the LHC".PHYSICAL REVIEW D 91.5(2015):55030.