Scalar Leptoquark Contribution to Two Photon Elastic Scattering

TL;DR

This paper investigates how Scalar Leptoquark loops influence high-energy two-photon elastic scattering, providing detailed amplitude calculations and combining these with Standard Model results to enhance understanding of potential new physics effects.

Contribution

It offers the first detailed calculation of Scalar Leptoquark loop contributions to two-photon scattering amplitudes at high energies, extending previous SM-focused analyses.

Findings

Scalar Leptoquark loops significantly modify the scattering cross section.

Helicity amplitudes are explicitly calculated for high-energy regimes.

Results suggest potential observable effects in future high-energy photon experiments.

Abstract

We study the contribution of Scalar Leptoquark (SLQ) loops to the two photon scattering cross section at high energies. The leading order helicity amplitudes are discussed at coupling O(e4) for Standard Model (SM) fermions, weak bosons and SLQs. Helicity amplitudes for the different types of loops are calculated for photon center of mass energies being much higher than weak boson mass scale but still much lower than the predicted Leptoquark mass scales. Finally, the cross section due to the SLQ loops is presented in conjunction with the known SM contribution.