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Abstract: I discuss different aspects of the phenomenology of hypothetical sub eV massparticles arising in the context of extensions of the standard model. I focuson a simple extension based on an additional U1 gauge symmetry and itscorresponding gauge boson, called ``hidden photon-. Kinetic mixing with thestandard photon leads to photon-hidden photon oscillations that are searchedfor in laboratory experiments like ALPS at DESY. Hidden photons produced in theinterior of the Sun could be also detected in axion helioscopes like CAST atCERN and could play an interesting role in late cosmology, where the presenceof additional feebly interacting relativistic particles seems to be favored.All these effects disappear as the hidden photon mass decreases, allowingphenomenologically large kinetic mixings. However, in this case such a hiddenphoton will even play a role in gauge coupling unification.



Autor: Javier Redondo

Fuente: https://arxiv.org/



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