Light scalars coupled to photons and non-newtonian forces |
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Authors: | Dupays Arnaud Massó Eduard Redondo Javier Rizzo Carlo |
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Institution: | INAF-IASF, Via E. Bassini 15, I-20133 Milan, Italy. |
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Abstract: | A particle phi 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 phigammagamma coupling. We discuss the impact on the recent PVLAS results and the role of paraphoton models introduced to solve the PVLAS-CAST puzzle. |
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