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Energy loss during Dark Matter propagation in an overburden · Around

2017

Energy loss during Dark Matter propagation in an overburden

Mahdawi, M. Shafi, Farrar, Glennys R.

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As experimental constraints on DM interactions become ever more sensitive and push into new regimes of DM mass, it becomes more and more challenging to accurately model the process by which Dark Matter particles lose energy through scattering in the Earth's surface or other overburdens.

We show that a commonly-used approximation due to Starkman, Gould, Esmailzadeh and Dimopoulos (SGED) can fail badly in computing the attenuation, even while being useful for an order-of-magnitude estimate of the maximum cross section reach.
We introduce a method of importance sampling which makes Monte-Carlo simulation of energy loss feasible, in spite of factor-$10^7$ or greater attenuation.
We demonstrate the validity of our new method and expose multiple problems with the SGED approximation, this reveals interesting features of the energy loss process.

Built on

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G. D. Starkman, A. Gould, R. Esmailzadeh and S. Dimopoulos, Opening the window on strongly interacting dark matter , Phys. Rev. D 41
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G. Fricke, C. Bernhardt, K. Heilig, L. Schaller, L. Schellenberg, E. Shera et al., Nuclear ground state charge radii from electromagnetic interactions , Atomic Data and Nuclear Data Tables 60
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G. R. Farrar, A stable h-dibaryon: Dark matter, candidate within qcd? , International Journal of Theoretical Physics 42
2003
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