Origin of the tentative AMS antihelium events

Coogan, Adam; Profumo, Stefano

doi:10.1103/physrevd.96.083020

Title: Origin of the tentative AMS antihelium events

Journal Article · Tue Oct 31 00:00:00 EDT 2017 · Physical Review. D.

DOI:https://doi.org/10.1103/physrevd.96.083020· OSTI ID:1541090

Coogan, Adam ^[1]; Profumo, Stefano ^[1]

Univ. of California, Santa Cruz, CA (United States)

We demonstrate that the tentative detection of a few antihelium events with the Alpha Magnetic Spectrometer (AMS) on board the International Space Station can, in principle, be ascribed to the annihilation or decay of Galactic dark matter, when accounting for uncertainties in the coalescence process leading to the formation of antinuclei. We show that the predicted antiproton rate, assuming the antihelium events came from dark matter, is marginally consistent with AMS data, as is the antideuteron rate with current available constraints. We argue that a dark matter origin can be tested with better constraints on the coalescence process, better control of misidentified events, and with future antideuteron data.

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Research Organization:: Univ. of California, Santa Cruz, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0010107

OSTI ID:: 1541090

Alternate ID(s):: OSTI ID: 1406145

Journal Information:: Physical Review. D., Vol. 96, Issue 8; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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Cosmic antihelium-3 nuclei sensitivity of the GAPS experiment Saffold, N.; Aramaki, T.; Bird, R. Astroparticle Physics, Vol. 130 https://doi.org/10.1016/j.astropartphys.2021.102580	journal	July 2021
How to produce antinuclei from dark matter Heeck, Julian; Rajaraman, Arvind Journal of Physics G: Nuclear and Particle Physics, Vol. 47, Issue 10 https://doi.org/10.1088/1361-6471/ab9f03	journal	September 2020
Cosmic-ray antinuclei as messengers of new physics: status and outlook for the new decade Doetinchem, P. von; Perez, K.; Aramaki, T. Journal of Cosmology and Astroparticle Physics, Vol. 2020, Issue 08 https://doi.org/10.1088/1475-7516/2020/08/035	journal	August 2020
Phenomenology of scotogenic scalar dark matter Ávila, Ivania M.; De Romeri, Valentina; Duarte, Laura The European Physical Journal C, Vol. 80, Issue 10 https://doi.org/10.1140/epjc/s10052-020-08480-z	journal	October 2020
Understanding the background in dark matter searches by studying antinucleosynthesis in the laboratory with ALICE Hornung, Sebastian Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) https://doi.org/10.22323/1.390.0634	conference	February 2021
Astro 2020 Science White Paper: Cosmic-ray Antinuclei as Messengers for Dark Matter Perez, Kerstin; von Doetinchem, Philip; Aramaki, Tsuguo arXiv https://doi.org/10.48550/arxiv.1904.05938	preprint	January 2019

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