ATLAS Z-peaked excess in the MSSM with a light sbottom or stop
文献类型：期刊论文
| 作者 | Kobakhidze, A; Liu, N; Wu, L; Yang, JM
|
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2015 |
| 卷号 | 92期号:7页码:75008 |
| 通讯作者 | Liu, N (reprint author), Henan Normal Univ, Coll Phys & Elect Engn, Xinxiang 453007, Peoples R China. |
| 英文摘要 | 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). |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 关键词[WOS] | PP COLLISIONS ; LHC ; SEARCH ; DETECTOR ; PARTICLE ; SQUARK ; BOSON ; MODEL |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/20837]  |
| 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 | 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.(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. |
入库方式： OAI收割
来源：理论物理研究所
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