Axion searches with two superconducting radio-frequency cavities

• Published in: The journal of high energy physics Vol. 2021; no. 7; pp. 1 - 22
• Main Authors: Gao, Christina, Harnik, Roni
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2021; Springer Nature B.V; Springer Nature; SpringerOpen
• Subjects: Atoms & subatomic particles; Beyond Standard Model; Classical and Quantum Gravitation; Dark matter; Elementary Particles; Emitters; Experiments; High energy physics; Holes; Laboratories; Magnetic fields; Other experiments; Parameter sensitivity; Phase matching; Physics; Physics and Astronomy; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Receivers & amplifiers; Regular Article - Experimental Physics; Relativity Theory; Sensitivity enhancement; String Theory; Superconductivity; Other experiments; Beyond Standard Model
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP07(2021)053

A bstract We propose an experimental setup to search for Axion-like particles (ALPs) using two superconducting radio-frequency cavities. In this light-shining-through-wall setup the axion is sourced by two modes with large fields and nonzero E → ⋅ B → in an emitter cavity. In a nearby identical cavity only one of these modes, the spectator, is populated while the other is a quiet signal mode. Axions can up-convert off the spectator mode into signal photons. We discuss the physics reach of this setup finding potential to explore new ALP parameter space. Enhanced sensitivity can be achieved if high-level modes can be used, thanks to improved phase matching between the excited modes and the generated axion field. We also discuss the potential leakage noise effects and their mitigation, which is aided by O (GHz) separation between the spectator and signal frequencies.