Effects of heavy bosonic excitations on QED vacuum

Details Effects of heavy bosonic excitations on QED vacuum Effects of heavy bosonic excitations on QED vacuum

2008-03-31

arxiv.org/abs/0803.4491v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

References adde and section II rewritten. MPLA in press

Scientific paper

We discuss the contribution of axion-like excitations (ALE) to the vacuum birrefringence in the limit $m_A \gtrsim \omega$, where $m_A$ is the mass of the excitation and $\omega$ the energy of test photons interacting with an external (intense) magnetic field. The relevance of this term with respect to the QED contribution depends on the ratio $g_A/m_A$ and, from present bounds on the mass and the coupling constant $g_A$, we find that in the present low energy regime, it ranges from $10^{-14}$ to $10^2$ suggesting an interesting alternative to explore.

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