2013/06/30 by N. Fornengo, N Fornengo, L. Maccione +3 · 1 citation
Physics and Astronomy · #Annihilation #Antiparticle #Antiproton #Astrophysics and Cosmic Phenomena #Coalescence (physics) #Cosmic ray #Dark Matter and Cosmic Phenomena #Dark matter #Interstellar medium #Neutrino Physics Research #Scalar field dark matter #WIMP #astro-ph.CO #astro-ph.HE #hep-ph
paper · pdf · doi:10.1088/1475-7516/2013/09/031
published as JCAP09(2013)031 · 48 pages, 31 figures; v2 matches version published on JCAP. In v3: a few typos in the equations of Section 3 have been corrected; a bug in the implementation of the "old" coalescence model has been fixed and, as a result, the curves for this model in Figs. 2,3,4 and 8 have been upscaled by a factor of 2. All the results of the analysis are not affected by these changes
openalex publication_date 2013/09/25 · openalex created_date 2016/06/24 · arxiv created 2017/07/25 · arxiv updated 2017/07/26 · openalex updated_date 2026/08/05
The search for antideuterons in cosmic rays has been proposed as a promising channel for dark matter indirect detection, especially for dark matter particles with a low or intermediate mass. With the current operational phase of the AMS-02 experiment and the ongoing development of a future dedicated experiment, the General Antiparticle Spectrometer (GAPS), there are exciting prospects for a dark matter detection in the near future. In this paper we develop a detailed and complete re-analysis of the cosmic-ray antideuteron signal, by discussing the main relevant issues related to antideuteron production and propagation through the interstellar medium and the heliosphere. In particular, we first critically revisit the coalescence mechanism for antideuteron production in dark matter annihilation processes. Then, since antideuteron searches have their best prospects of detection at low kinetic energies where the effect of the solar wind and magnetic field are most relevant, we address the impact of solar modulation modeling on the antideuteron flux at the Earth by developing a full numerical 4D solution of cosmic rays transport in the heliosphere. We finally use these improved predictions to provide updated estimates of the reaching capabilities for AMS-02 and GAPS, compatible with the current constraints imposed by the antiprotons measurements of PAMELA. After the antiproton bound is applied, prospects of detection of up to about 15 events in GAPS LDB+ and AMS-02 missions are found, depending on the dark matter mass, annihilation rate and production channel from one side, and on the coalescence process, galactic and solar transport parameters on the other.