Effects of Curvature-Higgs Coupling on Electroweak Fine-Tuning
arXiv:1405.0300 · doi:10.1016/j.physletb.2014.05.002
Abstract
It is shown that, nonminimal coupling between the Standard Model (SM) Higgs field and spacetime curvature, present already at the renormalizable level, can be fine-tuned to stabilize the electroweak scale against power-law ultraviolet divergences. The nonminimal coupling acts as an extrinsic stabilizer with no effect on the loop structure of the SM, if gravity is classical. This novel fine-tuning scheme, which could also be interpreted within Sakharov's induced gravity approach, works neatly in extensions of the SM involving additional Higgs fields or singlet scalars.
arXiv comment11 pp. Added references
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