Confronting electroweak fine-tuning with No-Scale Supergravity
Year: 2014
Type: article
Abstract: Applying No-Scale Supergravity boundary conditions at a heavy unification scale to the Flipped SU ( 5 ) grand unified theory with extra TeV-scale vector-like multiplets, i.e. No-Scale F - SU ( 5 ) , we express the Z -boson mass M Z as an explicit function of the boundary gaugino mass M 1 / 2 , M Z 2 = M Z 2 ( M 1 / 2 2 ) , with implicit dependence upon a dimensionless ratio c of the supersymmetric Higgs mixing parameter μ and M 1 / 2 . Setting the top Yukawa coupling consistent with m t = 174.3 GeV at M Z = 91.2 GeV , the value of c naturally tends toward c ≃ 1 , which indirectly suggests underlying action of the Giudice–Masiero mechanism. Proportional dependence of all model scales upon the unified gaugino mass M 1 / 2 in the No-Scale F - SU ( 5 ) model suggests one possible mechanism of confronting the electroweak fine-tuning problem.
Source: Physics Letters B
Institutions: Texas A&M University, University of Electronic Science and Technology of China, Chinese Academy of Sciences, Kavli Institute for Theoretical Sciences, Institute of Theoretical Physics, Ball State University, University of Tulsa, Houston Advanced Research Center, Academy of Athens, Sam Houston State University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2049874577