Axion hot dark matter bounds

Details Axion hot dark matter bounds Axion hot dark matter bounds

2008-08-06

arxiv.org/abs/0808.0814v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Contribution to Proc. 4th Patras Workshop on Axions, WIMPs and WISPs (18-21 June 2008, DESY)

Scientific paper

We derive cosmological limits on two-component hot dark matter consisting of neutrinos and axions. We restrict the large-scale structure data to the safely linear regime, excluding the Lyman-alpha forest. We derive Bayesian credible regions in the two-parameter space consisting of m_a and sum(m_nu). Marginalizing over sum(m_nu) provides m_a<1.02 eV (95% CL). In the absence of axions the same data and methods give sum(m_nu)< 0.63 eV (95% CL).

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