Exploring the Dark Axion Portal in the LUXE-NPOD Experiment
Noam Ness, Barry Cimring

TL;DR
This paper investigates the potential of the LUXE-NPOD experiment to detect dark axion portal particles, specifically dark photons and axion-like particles, by analyzing their spectra and setting new constraints in previously unexplored parameter regions.
Contribution
It introduces a systematic method for analyzing constraints on multi-dimensional parameter spaces of dark photons and axion-like particles using LUXE-NPOD data.
Findings
LUXE-NPOD can probe new regions of dark axion parameter space.
Derived constraints on DP kinetic mixing below 10^{-2}.
Set limits on ALP-photon couplings in the 10^{-4}-10^{-3} GeV^{-1} range.
Abstract
The optical dump at the LUXE experiment has the potential to create a large flux of photons that can be used to look for new physics when directed at a solid material dump. The LUXE-NPOD extension of LUXE, which focuses the hard photons onto a slab of tungsten, offers two interaction points (laser-electron and photon-tungsten), making it well-suited to test theories containing two or more new particles. We examine the dark axion portal, a scenario involving both dark photons (DPs) and axion-like particles (ALPs) and their mutual interactions, and its implications on the phenomenology at LUXE-NPOD. To simulate the spectra of particle populations generated at the electron-laser interaction point, we solve a set of extended 1D cascade equations. We recover a photon spectrum consistent with previous analyses and present previously unconsidered DP and ALP spectra. We…
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Particle physics theoretical and experimental studies · Astrophysics and Cosmic Phenomena
