Confronting electroweak fine-tuning with No-Scale Supergravity

Confronting electroweak fine-tuning with No-Scale Supergravity
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面对无尺度超重力的电弱微调

DOI:
10.1016/j.physletb.2014.11.023
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发表时间:
2014-08
期刊:
影响因子:
4.4
通讯作者:
Walker, Joel W.
Walker, Joel W.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Li, Tianjun;Maxin, James A.;Nanopoulos, Dimitri V.;Walker, Joel W.

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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, ie 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.
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