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Sensitivity of the GAPS Experiment to Low-energy Cosmic-ray Antiprotons

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arxiv 2206.12991 v2 pith:BD627YAP submitted 2022-06-26 astro-ph.HE astro-ph.IMphysics.ins-det

Sensitivity of the GAPS Experiment to Low-energy Cosmic-ray Antiprotons

Field Rogers , Tsuguo Aramaki , Mirko Boezio , Steven Boggs , Valter Bonvicini , Gabriel Bridges , Donatella Campana , William W. Craig
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Philip von Doetinchem Eric Everson Lorenzo Fabris Sydney Feldman Hideyuki Fuke Florian Gahbauer Cory Gerrity Charles J. Hailey Takeru Hayashi Akiko Kawachi Masayoshi Kozai Alex Lenni Alexander Lowell Massimo Manghisoni Nadir Marcelli Brent Mochizuki Isaac Mognet Kazuoki Munakata Riccardo Munini Yusuke Nakagami Jerome Olson Rene Ong Guiseppe Osteria Kerstin M. Perez Sean Quinn Valerio Re Elisa Riceputi Brandon Roach Jaime Ryan Nathan Saffold Valentina Scotti Yuki Shimizu Roberta Sparvoli Achim Stoessl Alessio Tiberio Elena Vannuccini Takuya Wada Mengjiao Xiao Masahiro Yamatani Kelsey Yee Atsumasa Yoshida Tetsuya Yoshida Gianluigi Zampa Jiancheng Zeng Jeffrey Zweerink
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classification astro-ph.HE astro-ph.IMphysics.ins-det
keywords gapsantiprotonantiprotonscosmiccosmic-raywillexperimentidentification
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The General Antiparticle Spectrometer (GAPS) is an upcoming balloon mission to measure low-energy cosmic-ray antinuclei during at least three ~35-day Antarctic flights. With its large geometric acceptance and novel exotic atom-based particle identification, GAPS will detect ~500 cosmic antiprotons per flight and produce a precision cosmic antiproton spectrum in the kinetic energy range of ~0.07-0.21 GeV/n at the top of the atmosphere. With these high statistics extending to lower energies than any previous experiment, and with complementary sources of experimental uncertainty compared to traditional magnetic spectrometers, the GAPS antiproton measurement will be sensitive to dark matter, primordial black holes, and cosmic ray propagation. The antiproton measurement will also validate the GAPS antinucleus identification technique for the antideuteron and antihelium rare-event searches. This analysis demonstrates the GAPS sensitivity to cosmic-ray antiprotons using a full instrument simulation and event reconstruction, and including solar and atmospheric effects.

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Cited by 2 Pith papers

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  1. The General Antiparticle Spectrometer (GAPS) Antarctic Balloon Payload

    astro-ph.IM 2026-04 unverdicted novelty 5.0

    GAPS has constructed and launched a stratospheric balloon spectrometer that uses silicon trackers and TOF detectors to identify low-energy antiprotons, antideuterons, and antihelium via exotic-atom formation and annih...

  2. Revisiting predictions for cosmic-ray antinucleon fluxes from Galactic Dark Matter

    hep-ph 2026-05 unverdicted novelty 4.0

    Updated predictions for cosmic antinuclei fluxes from dark matter yield tighter upper limits on light DM annihilation cross sections from AMS-02 antiproton data and show that GAPS could improve those limits by up to a...