Sommerfeld Enhancement from Multiple Mediators

Details Sommerfeld Enhancement from Multiple Mediators Sommerfeld Enhancement from Multiple Mediators

2012-03-28

arxiv.org/abs/1203.6341v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

17p, 2 figures

Scientific paper

We study the Sommerfeld enhancement experienced by a scattering object that couples to a tower of mediators. This can occur in, e.g., models of secluded dark matter when the mediator scale is generated naturally by hidden-sector confinement. Specializing to the case of a confining CFT, we show that off-resonant values of the enhancement can be increased by ~ 20% for cases of interest when (i) the (strongly-coupled) CFT admits a weakly-coupled dual description and (ii) the conformal symmetry holds up to the Planck scale. Larger enhancements are possible for lower UV scales due to an increase in the coupling strength of the tower.

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