Probing ALPs at the CERN Gamma Factory

Abstract

The aim of the proposed CERN Gamma Factory is to produce $\sim 10^{17}$ photons per second with energies up to 400 MeV. The photon beam intensity is expected to be a factor of $\mathcal{O}(10^7)$ larger than that of the presently available photon beams in the MeV energy range. In this work, we explore its potential to probe physics beyond the Standard Model. In particular, we discuss searches for axion like particles (ALPs) with dominant couplings to photons and consider various production scenarios - fixed target, photon-photon collision, and conversion by a magnetic field and detection schemes - via decay to photons or back-conversion. We find that the Gamma Factory in a fixed target mode can probe ALPs with mass $m_a\lesssim \mathcal{O}(100\mathrm{MeV})$ and decay constants larger than $10^7$ GeV, improving by an order of magnitude the discovery potential of previous beam dump experiments.

12 pages, 4 figures

References in corpus (10)

• New Fixed-Target Experiments to Search for Dark Gauge Forces
• Study of the decay K+ => pi+,nu,nubar in the momentum region 140<Ppi<199 MeV/c
• Revised constraints and Belle II sensitivity for visible and invisible axion-like particles
• New PVLAS results and limits on magnetically induced optical rotation and ellipticity in vacuum
• A taste of dark matter: Flavour constraints on pseudoscalar mediators
• A New Flavor of Searches for Axion-Like Particles
• Contributions of axion-like particles to lepton dipole moments
• Search for Axionlike and Scalar Particles with the NA64 Experiment
• A New Measurement of the ${\pi }^0$ Radiative Decay Width
• Relaxation from particle production