Cosmic-ray Antinuclei as Messengers of New Physics: Status and Outlook for the New Decade

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dc.contributor.authorSakai, K.
dc.date.accessioned2020-03-24T15:55:43Z
dc.date.available2020-03-24T15:55:43Z
dc.date.issued2020-02-11
dc.description.abstractThe precise measurement of cosmic-ray antinuclei serves as an important means for identifying the nature of dark matter and other new astrophysical phenomena, and could be used with other cosmic-ray species to understand cosmic-ray production and propagation in the Galaxy. For instance, low-energy antideuterons would provide a "smoking gun" signature of dark matter annihilation or decay, essentially free of astrophysical background. Studies in recent years have emphasized that models for cosmic-ray antideuterons must be considered together with the abundant cosmic antiprotons and any potential observation of antihelium. Therefore, a second dedicated Antideuteron Workshop was organized at UCLA in March 2019, bringing together a community of theorists and experimentalists to review the status of current observations of cosmic-ray antinuclei, the theoretical work towards understanding these signatures, and the potential of upcoming measurements to illuminate ongoing controversies. This review aims to synthesize this recent work and present implications for the upcoming decade of antinuclei observations and searches. This includes discussion of a possible dark matter signature in the AMS-02 antiproton spectrum, the most recent limits from BESS Polar-II on the cosmic antideuteron flux, and reports of candidate antihelium events by AMS-02; recent collider and cosmic-ray measurements relevant for antinuclei production models; the state of cosmic-ray transport models in light of AMS-02 and Voyager data; and the prospects for upcoming experiments, such as GAPS. This provides a roadmap for progress on cosmic antinuclei signatures of dark matter in the coming years.en_US
dc.description.sponsorshipThis work is supported in the U.S. by NASA APRA grants (NNX17AB44G, NNX17AB45G, NNX17AB46G, and NNX17AB47G). R.A. Ong received support from the UCLA Division of Physical Sciences. P. von Doetinchem received support from the National Science Foundation under award PHY-1551980. H. Fuke is supported by JSPS KAKENHI grants (JP17H01136 and JP19H05198) and Mitsubishi Foundation research grant 2019-10038. N. Fornengo, F. Donato, and M. Korsmeier are supported by the “Departments of Excellence” 2018-2022 grant awarded by the Italian Ministry of Education, University and Research (MIUR) L. 232/2016, research grant TAsP (Theoretical Astroparticle Physics) funded by INFN, research grant ‘The Dark Universe: A Synergic Multimessenger Approach’ No. 2017X7X85K funded by MIUR. N. Fornengo is further supported by the research grant “The Anisotropic Dark Universe” No. CSTO161409, funded by Compagnia di Sanpaolo and University of Turin. M. Kachelriess’ and J. Tjemsland’s work was partially supported by the Research Council of Norway (NFR). I.V. Moskalenko acknowledges a partial support from NASA APRA grant NNX17AB48G. M. Naskret’s work was supported by the Polish National Science Centre grant 2017/27/N/ST2/01009. F. Rogers is supported through the National Science Foundation Graduate Research Fellowship under Grant No. 1122374. M.W. Winkler acknowledges support by the Vetenskapsradet (Swedish Research Council) through contract No. 638-2013-8993.en_US
dc.description.urihttps://arxiv.org/abs/2002.04163en_US
dc.format.extent42 pagesen_US
dc.genrejournal articles preprintsen_US
dc.identifierdoi:10.13016/m2kb8v-teda
dc.identifier.citationSakai, K. et al.; Cosmic-ray Antinuclei as Messengers of New Physics: Status and Outlook for the New Decade; High Energy Astrophysical Phenomena (2020); https://arxiv.org/abs/2002.04163en_US
dc.identifier.urihttp://hdl.handle.net/11603/17613
dc.language.isoen_USen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsPublic Domain Mark 1.0*
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleCosmic-ray Antinuclei as Messengers of New Physics: Status and Outlook for the New Decadeen_US
dc.typeTexten_US

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