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ATLAS Z-peaked excess in the MSSM with a light sbottom or stop
Kobakhidze, A; Liu, N; Wu, L; Yang, JM; Liu, N (reprint author), Henan Normal Univ, Coll Phys & Elect Engn, Xinxiang 453007, Peoples R China.
2015
发表期刊PHYSICAL REVIEW D
卷号92期号:7页码:75008
文章类型Article
摘要We attempt to explain the recent ATLAS 3 sigma excess of dilepton events with an invariant mass near Z peak through the gluino-mediated sbottom production in a simplified scenario inspired by the minimal supersymmetric Standard Model. The additional Z bosons can be produced through the cascade decay chain (g) over tilde -> b (b) over tilde1(dagger) -> b (b) over bar(chi) over tilde (0)(2,3) -> b (b) over bar(chi) over tilde (0)(1)Z, in which (b) over tilde (1) is the right-handed sbottom, (chi) over tilde (0)(1) is the bino-like lightest supersymmetric particle (LSP) and (chi) over tilde (0)(2,3) are two nearly degenerate Higgsino-like next-to LSPs. Taking into account the constraint from the LHC search for the gluino-mediated sbottom production in the final states with the missing transverse energy and at least three b-jets, we find that the ATLAS on-Z excess can only be marginally explained at the 2 sigma level. We also note that within the scenario where the gluino predominantly decays to the right-handed stop instead of the sbottom, the excess can hardly be explained, since the Z-boson is not produced in the stop dominant decay channel, (t) over tilde (1) -> b (chi) over tilde (+)(1).
学科领域Astronomy & Astrophysics ; Physics
资助者Australian Research Council ; Australian Research Council ; Australian Research Council ; Australian Research Council ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Australian Research Council ; Australian Research Council ; Australian Research Council ; Australian Research Council ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002]
DOIhttp://dx.doi.org/10.1103/PhysRevD.92.075008
关键词[WOS]PP COLLISIONS ; LHC ; SEARCH ; DETECTOR ; PARTICLE ; SQUARK ; BOSON ; MODEL
收录类别SCI
语种英语
资助者Australian Research Council ; Australian Research Council ; Australian Research Council ; Australian Research Council ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Australian Research Council ; Australian Research Council ; Australian Research Council ; Australian Research Council ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; National Natural Science Foundation of China (NNSFC) [11275057, 11305049, 11405047, 11375001] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002] ; Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002]
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/20837
专题理论物理所SCI论文
通讯作者Liu, N (reprint author), Henan Normal Univ, Coll Phys & Elect Engn, Xinxiang 453007, Peoples R China.
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Kobakhidze, A,Liu, N,Wu, L,et al. ATLAS Z-peaked excess in the MSSM with a light sbottom or stop[J]. PHYSICAL REVIEW D,2015,92(7):75008.
APA Kobakhidze, A,Liu, N,Wu, L,Yang, JM,&Liu, N .(2015).ATLAS Z-peaked excess in the MSSM with a light sbottom or stop.PHYSICAL REVIEW D,92(7),75008.
MLA Kobakhidze, A,et al."ATLAS Z-peaked excess in the MSSM with a light sbottom or stop".PHYSICAL REVIEW D 92.7(2015):75008.
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