10-17 July 2019
Europe/Brussels timezone

The GAPS experiment for dark matter detection with cosmic ray antinuclei.

11 Jul 2019, 10:05
Campus Ledeganck - Aud. 2 (Ghent)

Campus Ledeganck - Aud. 2


Parallel talk Dark Matter Dark Matter


Riccardo Munini (INFN - Universita Studi Trieste)


The General Antiparticle Spectrometer (GAPS) will carry out a sensitive dark matter search by measuring low-energy (E < 0.25 GeV/nucleon) cosmic ray antinuclei. The primary target are low-energy antideuterons that might be produced in the annihilation or decay of dark matter. At these energies the antideuteron intensity from secondary/tertiary interactions is expected to be several orders of magnitude lower with respect to those predicted by beyond the standard model theories. GAPS will also conduct a low-energy antihelium search and will provide the highest-statistics spectral measurement of antiproton at these energies. Combined, these observations will provide a powerful search for dark matter and for primordial black hole evaporation.

GAPS will use a novel particle identification method based on exotic atom formation and
decay with emission of pions, protons and atomic X-rays from a common annihilation vertex.
This detection technique will give GAPS the high rejection factors necessary for rare antinuclei searches.

The detector consists of a tracker, made up by ten planes of lithium-drifted silicon Si(Li) detectors, surrounded by a plastic scintillator
time-of-flight system.

The first of a series of a long-duration Antarctic balloon flight is expected for the austral summer of 2020 or 2021. This presentation covers the scientific motivation for the GAPS experiment, its design and its current status.

Primary author

Riccardo Munini (INFN - Universita Studi Trieste)

Presentation Materials