Antihelium-3 fluxes near Earth using data-driven estimates for annihilation cross section

S. Acharya, S. Basu, P. Christiansen, O. Matonoha, A.F. Nassirpour, A. Ohlson, A. Oskarsson, T. Richert, O.V. Rueda, D. Silvermyr, N. Zurlo, ALICE Collaboration

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review


Antinuclei found in cosmic rays could provide a smoking gun signal for dark matter as this signal is virtually background free. The study of 3He cosmic rays requires the knowledge of their production, propagation in the galaxy and annihilation cross-section. While the former two have been already estimated with data-driven methods, there were no experimental data available for the 3He inelastic cross section. We measured for the first time the inelastic cross section of 3He using the ALICE detector itself as a target. To study the effect of 3He annihilation in the galaxy and estimate the transparency of the galaxy, the 3He source functions and annihilation cross sections were implemented in GALPROP. © Copyright owned by the author(s) under the terms of the Creative Commons.
Original languageEnglish
Title of host publication37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect
Publication statusPublished - 2022
Event37th International Cosmic Ray Conference - Online, Berlin, Germany
Duration: 2021 Jul 122021 Jul 23
Conference number: 37

Publication series

NameProceedings of Science
PublisherSissa Medialab Srl
ISSN (Print)1824-8039


Conference37th International Cosmic Ray Conference
Abbreviated titleICRC2021

Subject classification (UKÄ)

  • Subatomic Physics

Free keywords

  • Annihilation
  • Cosmic rays
  • Cosmology
  • Annihilation cross sections
  • Dark matter
  • Data driven
  • Data-driven methods
  • Inelastic cross sections
  • Near-Earth
  • Source functions
  • Galaxies


Dive into the research topics of 'Antihelium-3 fluxes near Earth using data-driven estimates for annihilation cross section'. Together they form a unique fingerprint.

Cite this