A Two Particle Hidden Sector and the Oscillations with Photons
In this work we analyze the phenomenology of oscillations in vacuum of a model that contains two particles in the Hidden Sector, Axion-Like Particles (ALPs) and Hidden Photons. In this model Hidden Photons and photon oscillate with each other via kinetic mixing, and the oscillation of ALPs and photon is also possible -if an external magnetic field is present- since there is an effective interaction between ALPs and Hidden Photons as well. Some signatures of this model can be search for in laboratory experiments such as vacuum polarization-like and photon regeneration experiments. Such a mixing between the photon and the Hidden Sector particles will generally induce changes in the angle of ellipticity and polarization plane in a beam of photons that propagates transversally to an external magnetic field. We will discuss the novelties that this model introduces into those observables and the limiting cases where the two particle model is recovered. Using experimental bounds, we find the parameter space that can be constrained for both particles. We also discuss the challenges for the detection of models with more than one hidden particle in "light shining trough wall"-like experiments.
HEP Feb28 Maldonado flyer