TeV Scale Lee-Wick Fields out of Large Extra Dimensional Gravity

TL;DR

This paper explores how large extra dimensional gravity models naturally generate TeV scale Lee-Wick partners for gauge and matter fields through quantum gravitational corrections, potentially extending the Standard Model.

Contribution

It demonstrates that quantum gravitational effects in large extra dimensions induce TeV scale Lee-Wick partners for Standard Model particles within an effective field theory framework.

Findings

Quantum gravitational corrections modify two-point functions of gauge and matter fields.

The effective Lagrangian includes TeV scale Lee-Wick partners as additional degrees of freedom.

Large extra dimensions provide a natural mechanism for the emergence of Lee-Wick particles.

Abstract

We study the gravitational corrections to the Maxwell, Dirac and Klein-Gorden theories in the large extra dimension model in which the gravitons propagate in the (4+n)-dimensional bulk, while the gauge and matter fields are confined to the four-dimensional world. The corrections to the two-point Green's functions of the gauge and matter fields from the exchanges of virtual Kaluza-Klein gravitons are calculated in the gauge independent background field method. In the framework of effective field theory, we show that the modified one-loop renormalizable Lagrangian due to quantum gravitational effects contains a TeV scale Lee-Wick partner of every gauge and matter field as extra degrees of freedom in the theory. Thus the large extra dimension model of gravity provides a natural mechanism to the emergence of these exotic particles which were recently used to construct an extension of the Standard Model.