Torsion in Extra Dimensions and One-Loop Observables

Abstract

We study gravity with torsion in extra dimensions and derive an effective four-dimensional theory containing four-fermion contact operators at the fundamental scale of quantum gravity in the TeV range. These operators may have an impact on the low-energy observables and can manifest themselves or can be constrained in precision measurements. We calculate possible contributions of these operators to some observables at the one-loop level. We show that the existing precision data on the lepton decay mode of Z boson set limits on the fundamental scale of the gravity and compactification radius, which are more stringent than the limits previously derived in the literature.

7 pages and 2 figures. Accepted for publication in Phys. Rev. D

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Cited by in corpus (9)

• Axions in gravity with torsion
• Nonminimal couplings, gravitational waves, and torsion in Horndeski's theory
• Unimodular Einstein--Cartan gravity: Dynamics and conservation laws
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• Corrections to (pseudo)scalars decay into a fermion pair from gravitational torsion