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One-loop radiative correction to Kaluza-Klein masses in $$S^2/Z_2$$ universal extra-dimensional model. (English) Zbl 1331.83098
Summary: We investigate a radiative correction to the masses of Kaluza-Klein (KK) modes in a universal extra-dimensional model defined on a six-dimensional spacetime with extra space as a two-sphere orbifold $$S^2/Z_2$$. We first define the Feynman rules which are necessary for the calculation. We then calculate the one-loop diagrams which contribute to the radiative corrections to the KK masses, and obtain one-loop corrections to masses for fermions, gauge bosons, and scalar bosons. We estimate the one-loop corrections to KK masses for the first KK modes of standard model particles as a function of momentum cut-off scale, and we determine the lightest KK particle which would be a promising candidate for dark matter.

##### MSC:
 83E15 Kaluza-Klein and other higher-dimensional theories 83C47 Methods of quantum field theory in general relativity and gravitational theory
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