Probing axion-like particles with RF cavities separated by thin barrier

Abstract

We address the Light-Shining-Through-a-thin-Wall (LSthinW) laboratory setup to estimate the sensitivity of axion-like particle (ALP) detection using two radio-frequency (RF) cavities immersed in a static magnetic field. We analytically evaluate the asymptotic sensitivity in the off-shell regime for the lowest electromagnetic pump modes. We show that a sufficiently thin wall separating can lead to the improved sensitivity of the pure laboratory probes of ALP in the mass range $10^{-6}\mathrm{eV}\lesssim m_a\lesssim 10^{-4}\mathrm{eV}$.

6 pages, 1 figure, 1 table