Effects of heavy bosonic excitations on QED vacuum

Autor:	Arias, Paola, Falomir, Horacio, Gamboa, Jorge, Mendez, Fernando
Rok vydání:	2008
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Theory
Druh dokumentu:	Working Paper
DOI:	10.1142/S0217732309028898
Popis:	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. Comment: References adde and section II rewritten. MPLA in press
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0803.4491 Zobrazit plný text záznamu View this record from Arxiv