Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-04-08
Phys.Rev. D73 (2006) 031701
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 3 figures, to be published in Rapid Communication in Physical Review D
Scientific paper
10.1103/PhysRevD.73.031701
We investigate a possibility of neutralino dark matter (DM) direct detection in the future electron accelerators. That is counting of high p_T electron recoil events by neutralinos in halo. If selectron and neutralino masses would be precisely measured in future collider experiments, the beam energy could be tuned so that the scatterings are dominated by on-pole selectron exchange. When selectron and neutralino mass difference is smaller than O(10) GeV, the elastic cross section exceeds over micro barn. Discovery of the high p_T electron events would be a firm prove of the neutralino DM component in halo. In the experiment, the electron beam energy must be tuned within O(10) MeV and the electron beam with high currents of O(100)A is required for the detectors of the total length of a few hundred meters so that the sufficient event rate is obtained. The dependence of the event rate on the DM velocity distribution in halo is also discussed. This method might be applicable to other DM candidates.
Hisano Junji
Nagai Minoru
Nojiri Mihoko M.
Senami Masato
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