ATLAS Z-peaked excess in the MSSM with a light sbottom or stop

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	ATLAS Z-peaked excess in the MSSM with a light sbottom or stop
	Kobakhidze, A; Liu, N; Wu, L; Yang, JM
刊名	PHYSICAL REVIEW D
	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
内容类型	期刊论文
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.