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Effects of curvature-Higgs coupling on electroweak fine-tuning

By Turkey) İzmir TR35430 IZTECH İzmir Institute of Technology Durmuş Ali(Department of Physics Demir


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

Year: 2014
DOI identifier: 10.1016/j.physletb.2014.05.002
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