Quantum corrections to the kinetic term in the Randall-Sundrum model

TL;DR

This paper investigates quantum corrections to the radion's kinetic term in the Randall-Sundrum model, finding that one-loop corrections from conformally coupled fermions vanish, impacting radion mass calculations.

Contribution

It provides a detailed analysis of quantum corrections to the radion kinetic term, highlighting the vanishing of one-loop effects from conformally coupled fermions.

Findings

One-loop quantum corrections from conformally coupled fermions vanish.

Kinetic terms are crucial for radion mass determination.

Fine tuning remains necessary for the observed hierarchy.

Abstract

The effective action of the radion in the Randall-Sundrum model is analysed. Fine tunings are needed to obtain the observed mass hierarchy and an invisible radion. since the kinetic terms are important for determining the radion mass, the finite quantum corrections from massless conformally coupled fermions are analysed and found to vanish at one loop order.