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题名: Constricted SUSY from No-Scale F-SU(5): A "blind spot" for LHC top quark reconstruction?
作者: Li, TJ ;  Maxin, JA ;  Nanopoulos, DV ;  Walker, JW
刊名: EPL
出版日期: 2013
卷号: 104, 期号:3, 页码:31001
学科分类: Physics
通讯作者: Li, TJ (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
部门归属: [Li, Tianjun] Chinese Acad Sci, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Li, Tianjun] Chinese Acad Sci, KITPC, Inst Theoret Phys, Beijing 100190, Peoples R China; [Li, Tianjun; Maxin, James A.; Nanopoulos, Dimitri V.] Texas A&M Univ, George P & Cynthia W Mitchell Inst Fundamental Ph, College Stn, TX 77843 USA; [Maxin, James A.] Ball State Univ, Dept Phys & Astron, Muncie, IN 47306 USA; [Nanopoulos, Dimitri V.] HARC, Astroparticle Phys Grp, The Woodlands, TX 77381 USA; [Nanopoulos, Dimitri V.] Acad Athens, Div Nat Sci, Athens 10679, Greece; [Walker, Joel W.] Sam Houston State Univ, Dept Phys, Huntsville, TX 77341 USA
英文摘要: We describe a region of the No-Scale F-SU(5) supersymmetric model with TeV-scale vector-like matter multiplets that is potentially opaque to LHC observations based upon top quark reconstruction. Possessing a 100% on-shell branching fraction for gluino-to-light stop decays, the gluino-light stop mass splitting in F-SU(5) lies very close to the top quark rest mass in the region 810 (650) less than or similar to M((g) over tilde) (M((t) over tilde)) less than or similar to 1170 (975) GeV. For unboosted gluino pair production, this could render two soft top quarks in the dominant 4-top signature, greatly reducing the likelihood for discrimination from the combinatoric background. We therefore suggest that caution is warranted when gluino exclusion bounds on models possessing a similar spectral character (gluino heavier than the light stop but lighter than all other squarks) using multijet SUSY search tactics. Alternate search methods are highlighted, including those based upon same-sign dileptons and multiple heavy flavor tags, which are more sensitive to this delicate kinematic "blind spot" crease. Copyright (C) EPLA, 2013
资助者: DOE [DE-FG03-95-Er-40917]; Natural Science Foundation of China [10821504, 11075194, 11135003, 11275246]; Mitchell-Heep Chair in High Energy Physics; Sam Houston State University
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000328564200005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15250
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Li, TJ,Maxin, JA,Nanopoulos, DV,et al. Constricted SUSY from No-Scale F-SU(5): A "blind spot" for LHC top quark reconstruction?[J]. EPL,2013,104(3):31001.
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