HAL : in2p3-00670808, version 1
 arXiv : 1202.3372
 Journal of Cosmology and Astroparticle Physics 04 (2012) 006
 Three-dimensional track reconstruction for directional Dark Matter detection
 J. Billard1, F. Mayet1, D. Santos1
 MIMAC Collaboration(s)
 (2012)
 Directional detection of Dark Matter is a promising search strategy. However, to perform such detection, a given set of parameters has to be retrieved from the recoiling tracks : direction, sense and position in the detector volume. In order to optimize the track reconstruction and to fully exploit the data of forthcoming directional detectors, we present a likelihood method dedicated to 3D track reconstruction. This new analysis method is applied to the MIMAC detector. It requires a full simulation of track measurements in order to compare real tracks to simulated ones. We conclude that a good spatial resolution can be achieved, i.e. sub-mm in the anode plane and cm along the drift axis. This opens the possibility to perform a fiducialization of directional detectors. The angular resolution is shown to range between 20$^\circ$ to 80$^\circ$, depending on the recoil energy, which is however enough to achieve a high significance discovery of Dark Matter. On the contrary, we show that sense recognition capability of directional detectors depends strongly on the recoil energy and the drift distance, with small efficiency values (50%-70%). We suggest not to consider this information either for exclusion or discovery of Dark Matter for recoils below 100 keV and then to focus on axial directional data.
 Thème(s) : Physique/Astrophysique/Instrumentation et méthodes pour l'astrophysiquePlanète et Univers/Astrophysique/Instrumentation et méthodes pour l'astrophysiquePhysique/Physique/Instrumentations et Détecteurs
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1202.3372
 in2p3-00670808, version 1 http://hal.in2p3.fr/in2p3-00670808 oai:hal.in2p3.fr:in2p3-00670808 Contributeur : Emmanuelle Vernay <> Soumis le : Jeudi 16 Février 2012, 10:30:54 Dernière modification le : Mercredi 11 Avril 2012, 08:44:24