Probing new physics at the LUXE experiment

TL;DR

The LUXE experiment at DESY aims to explore non-perturbative QED and search for new physics like axion-like particles using high-intensity laser-electron collisions, offering competitive sensitivity to existing experiments.

Contribution

This work demonstrates the potential of the LUXE experiment to probe axion-like particles and other new physics beyond the standard model through photon flux measurements.

Findings

Can probe ALPs up to 350 MeV mass

Achieves sensitivity comparable to NA62

Explores ALPs-electron coupling

Abstract

The proposed LUXE experiment (Laser und XFEL Experiment) at DESY Hamburg, using the electron beam from the European XFEL, aims to probe QED in the non-perturbative regime created in collisions between high-intensity laser pulses and high-energy electron or photon beams. This setup also provides a unique opportunity to probe physics beyond the standard model. In this proceedings, we show that by leveraging the large photon flux generated at LUXE, one can probe axion-like-particles (ALPs) up to a mass of 350 MeV and with a photon coupling of $3\times{10}^{-6}\ \mathrm{GeV}^{-1}$. This reach is comparable to the background-free projection from NA62. In addition, we will discuss other probes of new physics such as ALPs-electron coupling.