New bounds on millicharged particles from cosmology
High Energy Physics - Phenomenology
2008-11-26 v2
Abstract
Particles with millicharge q and sub-eV mass can be produced in photon-photon collisions, distorting the energy spectrum of the Cosmic Microwave Background. We derive the conservative bound q < 10^-7 e (as well as model-dependent bounds two orders of magnitude stronger), incompatible with proposed interpretations of the PVLAS anomaly based on millicharged production or on millicharged-mediated axion-like couplings.
Cite
@article{arxiv.hep-ph/0703144,
title = {New bounds on millicharged particles from cosmology},
author = {Alessandro Melchiorri and Antonello Polosa and Alessandro Strumia},
journal= {arXiv preprint arXiv:hep-ph/0703144},
year = {2008}
}
Comments
7 pages, 2 figures. Final version