PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - DM - Dark Matter
Searching for cosmic antihelium nuclei with the GAPS experiment
A.Β Stoessl
Full text: pdf
Pre-published on: July 05, 2021
Published on: β€”
At low energies, cosmic antideuterons and antihelium provide an ultra-low background signature
of dark matter annihilation, decay, and other beyond the Standard Model phenomena. The General
Antiparticle Spectrometer (GAPS) is an Antarctic balloon experiment designed to search for low-
energy (0.1βˆ’0.3 GeV/𝑛) antinuclei, and is planned to launch in the austral summer of 2022. While
optimized for an antideuteron search, GAPS also has unprecedented capabilites for the detection
of low-energy antihelium nuclei, utilizing a novel detection technique based on the formation,
decay, and annihilation of exotic atoms. The AMS-02 collaboration has recently reported several
antihelium nuclei candidate events, which sets GAPS in a unique position to set constraints on the
cosmic antihelium flux in an energy region which is essentially free of astrophysical background.
In this contribution, we illustrate the capabilities of GAPS to search for cosmic antihelium-3
utilizing complete instrument simulations, event reconstruction, and the inclusion of atmospheric
effects. We show that GAPS is capable of setting unprecedented limits on the cosmic antihelium
flux, opening a new window on exotic cosmic physics.
DOI: https://doi.org/10.22323/1.395.0499
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.