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Su, W; Yang, JM
SUSY effects in R-b: Revisited under current experimental constraints
Source PublicationPHYSICS LETTERS B
AbstractIn 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 ( Funded by SCOAP(3).
Subject AreaAstronomy & Astrophysics ; Physics
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China [11275245, 11135003] ; CAS Center for Excellence in Particle Physics (CCEPP)
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Document Type期刊论文
Affiliation1.Acad Sinica, Inst Theoret Phys, Beijing 100190, Peoples R China
2.Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
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GB/T 7714
Su, W,Yang, JM. SUSY effects in R-b: Revisited under current experimental constraints[J]. PHYSICS LETTERS B,2016,757:136-141.
APA Su, W,&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.
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