Particle identification with the AMS-02 RICH detector: search for dark matter with antideuterons
| dc.creator | Arruda, Luísa | |
| dc.creator | Barão, Fernando | |
| dc.creator | Pereira, Rui | |
| dc.date | 2007-10-04 | |
| dc.date.accessioned | 2026-07-07T08:34:09Z | |
| dc.date.available | 2026-07-07T08:34:09Z | |
| dc.description | The Alpha Magnetic Spectrometer (AMS), whose final version AMS-02 is to be installed on the International Space Station (ISS) for at least 3 years, is a detector designed to measure charged cosmic ray spectra with energies up to the TeV region and with high energy photon detection capability up to a few hundred GeV, using state-of-the art particle identification techniques. It is equipped with several subsystems, one of which is a proximity focusing Ring Imaging Cherenkov (RICH) detector equipped with a dual radiator (aerogel+NaF), a lateral conical mirror and a detection plane made of 680 photomultipliers and light guides, enabling precise measurements of particle electric charge and velocity (Delta beta / beta ~ 10^-3 and 10^-4 for Z=1 and Z=10-20, respectively) at kinetic energies of a few GeV/nucleon. Combining velocity measurements with data on particle rigidity from the AMS-02 Tracker (Delta R / R ~ 2% for R=1-10 GV) it is possible to obtain a reliable measurement for particle mass. One of the main topics of the AMS-02 physics program is the search for indirect signatures of dark matter. Experimental data indicate that dark, non-baryonic matter of unknown composition is much more abundant than baryonic matter, accounting for a large fraction of the energy content of the Universe. Apart from antideuterons produced in cosmic-ray propagation, the annihilation of dark matter will produce additional antideuteron fluxes. Detailed Monte Carlo simulations of AMS-02 have been used to evaluate the detector's performance for mass separation, a key issue for anti-D/anti-p separation. Results of these studies are presented. | |
| dc.description | 5 pages. Contribution to the 20th European Cosmic Ray Symposium (Lisbon 2006). Presenter: Rui Pereira | |
| dc.identifier | https://arxiv.org/abs/0710.0993 | |
| dc.identifier | http://arxiv.org/abs/0710.0993 | |
| dc.identifier | Electronic publication in Proceedings of the 20th European Cosmic Ray Symposium - http://www.lip.pt/events/2006/ecrs/proc/ecrs06-s0-160.pdf | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/139333 | |
| dc.subject | Astrophysics | |
| dc.title | Particle identification with the AMS-02 RICH detector: search for dark matter with antideuterons | |
| dc.type | text |