2013/10/30 by M. Betz, F. Caspers, M. Gasior +2
Physics and Astronomy · #physics.ins-det
paper · pdf · doi:10.1103/physrevd.88.075014
published as Phys. Rev. D 88, 075014 (2013)
arxiv created 2013/10/30 · arxiv updated 2013/10/31
The CERN Resonant WISP Search (CROWS) probes the existence of Weakly Interacting Sub-eV Particles (WISPs) like axions or hidden sector photons. It is based on the principle of an optical light shining through the wall experiment, adapted to microwaves. Critical aspects of the experiment are electromagnetic shielding, design and operation of low loss cavity resonators and the detection of weak sinusoidal microwave signals. Lower bounds were set on the coupling constant g = 4.5 ⋅ 10-8 GeV-1 for axion like particles with a mass of ma = 7.2 μeV. For hidden sector photons, lower bounds were set for the coupling constant χ= 4.1 ⋅ 10-9 at a mass of mγ' = 10.8 μeV. For the latter we were probing a previously unexplored region in the parameter space.