SUSY effects in R-b: Revisited under current experimental constraints

doi:http://dx.doi.org/10.1016/j.physletb.2016.03.075

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	SUSY effects in R-b: Revisited under current experimental constraints
	Su, W; Yang, JM; Yang, JM (reprint author), Acad Sinica, Inst Theoret Phys, Beijing 100190, Peoples R China.; Yang, JM (reprint author), Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan.
刊名	PHYSICS LETTERS B
	2016
卷号	757 页码:136-141
关键词	Supersymmetry R-b
DOI	http://dx.doi.org/10.1016/j.physletb.2016.03.075
英文摘要	In this note we revisit the SUSY effects in R-b under current experimental constraints including the LHC Higgs data, the B-physics measurements, the dark matter relic density and direct detection limits, as well as the precision electroweak data. We first perform a scan to figure out the currently allowed parameter space and then display the SUSY effects in R-b. We find that although the SUSY parameter space has been severely restrained by current experimental data, both the general MSSM and the natural-SUSY scenario can still alter R-b with a magnitude sizable enough to be observed at future Z-factories (ILC, CEPC, FCC-ee, Super Z-factory) which produce 10(9)-10(12) Z-bosons. To be specific, assuming a precise measurement delta R-b = 2.0 x 10(-5) at FCC-ee, we can probe a right-handed stop up to 530 GeV through chargino-stop loops, probe a sbottom to 850 GeV through neutralino-sbottom loops and a charged Higgs to 770 GeV through the Higgs-top quark loops for a large tan beta. The full one-loop SUSY correction to R-b can reach 1 x 10(-4) in natural SUSY and 2 x 10(-4) in the general MSSM. (C) 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21621]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Su, W; Yang, JM (reprint author), Acad Sinica, Inst Theoret Phys, Beijing 100190, Peoples R China.; Yang, JM (reprint author), Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan.
推荐引用方式 GB/T 7714	Su, W,Yang, JM,Yang, JM ,et al. SUSY effects in R-b: Revisited under current experimental constraints[J]. PHYSICS LETTERS B,2016,757:136-141.
APA	Su, W,Yang, JM,Yang, JM ,&Yang, JM .(2016).SUSY effects in R-b: Revisited under current experimental constraints.PHYSICS LETTERS B,757,136-141.
MLA	Su, W,et al."SUSY effects in R-b: Revisited under current experimental constraints".PHYSICS LETTERS B 757(2016):136-141.