TY  - JOUR
AU  - Bernal, N.
AU  - Forero-Romero, J. E.
AU  - Garani, R.
AU  - Palomares-Ruiz, S.
PY  - 2014
DA  - 2014//
TI  - Systematic uncertainties from halo asphericity in dark matter searches
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 004
EP  - 30pp
VL  - 09
IS  - 9
PB  - Iop Publishing Ltd
KW  - dark matter theory
KW  - dark matter simulations
AB  - Although commonly assumed to be spherical, dark matter halos are predicted to be non-spherical by N-body simulations and their asphericity has a potential impact on the systematic uncertainties in dark matter searches. The evaluation of these uncertainties is the main aim of this work, where we study the impact of aspherical dark matter density distributions in Milky-Way-like halos on direct and indirect searches. Using data from the large N-body cosmological simulation Bolshoi, we perform a statistical analysis and quantify the systematic uncertainties on the determination of local dark matter density and the so-called J factors for dark matter annihilations and decays from the galactic center. We find that, due to our ignorance about the extent of the non-sphericity of the Milky Way dark matter halo, systematic uncertainties can be as large as 35%, within the 95% most probable region, for a spherically averaged value for the local density of 0.3-0.4 GeV/cm(3). Similarly, systematic uncertainties on the J factors evaluated around the galactic center can be as large as 10% and 15%, within the 95% most probable region, for dark matter annihilations and decays, respectively.
SN  - 1475-7516
UR  - http://arxiv.org/abs/arXiv:1405.6240
UR  - https://doi.org/10.1088/1475-7516/2014/09/004
DO  - 10.1088/1475-7516/2014/09/004
LA  - English
N1  - WOS:000342642500005
ID  - Bernal_etal2014
ER  -