Hadronic uncertainties in the elastic scattering of supersymmetric dark matter

被引：312

作者：

Ellis, John ^{[1
]}

Olive, Keith A. ^{[2
]}

Savage, Christopher ^{[2
]}

机构：

[1] CERN, Div TH, Dept Phys, CH-1211 Geneva 23, Switzerland

[2] Univ Minnesota, Sch Phys & Astron, William I Fine Theoret Phys Inst, Minneapolis, MN 55455 USA

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 06期

关键词：

D O I：

10.1103/PhysRevD.77.065026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We review the uncertainties in the spin-independent and spin-dependent elastic scattering cross sections of supersymmetric dark matter particles on protons and neutrons. We propagate the uncertainties in quark masses and hadronic matrix elements that are related to the pi-nucleon sigma term and the spin content of the nucleon. By far the largest single uncertainty is that in spin-independent scattering induced by our ignorance of the < N vertical bar(q) over barq vertical bar N > matrix elements linked to the pi-nucleon sigma term, which affects the ratio of cross sections on proton and neutron targets as well as their absolute values. This uncertainty is already impacting the interpretations of experimental searches for cold dark matter. We plead for an experimental campaign to determine better the pi-nucleon sigma term. Uncertainties in the spin content of the proton affect significantly, but less strongly, the calculation of rates used in indirect searches.

引用

页数：15

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