WIMP identification through a combined measurement of axial and scalar couplings

Details WIMP identification through a combined measurement of axial and scalar couplings WIMP identification through a combined measurement of axial and scalar couplings

2007-05-17

arxiv.org/abs/0705.2502v2

Phys.Rev.Lett.99:151301,2007

Astronomy and Astrophysics

Astrophysics

4 pages 2 figures, uses revtex. References added and Fig.2 improved. To appear in PRL

Scientific paper

10.1103/PhysRevLett.99.151301

We study the prospects for detecting Weakly Interacting Massive Particles (WIMPs), in a number of phenomenological scenarios, with a detector composed of a target simultaneously sensitive to both spin-dependent and spin-independent couplings, as is the case of COUPP (Chicagoland Observatory for Underground Particle Physics). First, we show that sensitivity to both couplings optimizes chances of initial WIMP detection. Second, we demonstrate that in case of detection, comparison of the signal on two complementary targets, such as in COUPP CF3I and C4F10 bubble chambers, allows a significantly more precise determination of the dark matter axial and scalar couplings. This strategy would provide crucial information on the nature of the WIMPs, and possibly allow discrimination between neutralino and Kaluza-Klein dark matter.

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