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2018

Non-parametric uncertainties in the dark matter velocity distribution

Fowlie, Andrew

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We investigate the impact of uncertainty in the velocity distribution of dark matter on direct detection experiments.

We construct an multinomial prior with a hyperparameter $\beta$ that describes the strength of our belief in an isotropic Maxwell-Boltzmann velocity distribution.
By varying $\beta$, we interpolate between a halo-independent and halo-dependent analysis.
We present a novel approximation for the marginalisation of this prior that is applicable to any counting experiment.

Non-parametric uncertainties in the dark matter velocity distribution · Around

Built on

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R. D. Cousins and V. L. Highland, Incorporating systematic uncertainties into an upper limit , Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 320
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G. Jungman, M. Kamionkowski and K. Griest, Supersymmetric dark matter , Phys. Rept. 267
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