On a Light Spinless Particle Coupled to Photons

Details On a Light Spinless Particle Coupled to Photons On a Light Spinless Particle Coupled to Photons

1995-03-10

arxiv.org/abs/hep-ph/9503293v3

Phys.Rev.D52:1755-1763,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex, 20p., 6 figures. Changes in sections 4, 5 and figure 2, our bounds are now more stringent. To be published in Physical

Scientific paper

10.1103/PhysRevD.52.1755

A pseudoscalar or scalar particle $\phi$ that couples to two photons but not to leptons, quarks and nucleons would have effects in most of the experiments searching for axions, since these are based on the $a \gamma \gamma $ coupling. We examine the laboratory, astrophysical and cosmological constraints on $\phi$ and study whether it may constitute a substantial part of the dark matter. We also generalize the $\phi$ interactions to possess $SU(2) \times U(1)$ gauge invariance, and analyze the phenomenological implications.

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