Abstract
A particle coupling to two photons couples also radiatively to charged particles, like protons. If the particle is a light scalar, this induced coupling leads to spin-independent non-Newtonian forces. We show that the experimental constraints on exotic, fifth-type forces lead to stringent constraints on the γγ coupling. We discuss the impact on the recent PVLAS results and the role of paraphoton models introduced to solve the PVLAS-CAST puzzle. © 2007 The American Physical Society.
Original language | English |
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Article number | 131802 |
Journal | Physical Review Letters |
Volume | 98 |
Issue number | 13 |
DOIs | |
Publication status | Published - 27 Mar 2007 |