Sensitivity of the GAPS experiment to low-energy cosmic-ray antiprotons

Rogers, F.; Aramaki, T.; Boezio, M.; Boggs, Steven E.; Bonvicini, V.; Bridges, Gabriel; Campana, D.; Craig, William W.; Doetinchem, P. von; Everson, E. T.; Fabris, L.; Feldman, Sydney Nicole; Fuke, H.; Gahbauer, F.; Gerrity, C.; Hailey, Charles J.; Hayashi, T.; Kawachi, A.; Kozai, M.; Lenni, A.; Lowell, A.; Manghisoni, M.; Marcelli, N.; Mochizuki, B.; Mognet, S. A. Isaac; Munakata, K.; Munini, R.; Nakagami, Yoshihiro; Osteria, G.; Perez, K.; Quinn, S.; Re, V.; Riceputi, E.; Roach, Brandon; Ryan, J.; Saffold, N.; Scotti, V.; Shimizu, Yuki; Sparvoli, R.; Stoeßl, A.; Tiberio, A.; Vannuccini, E.; Wada, Takahiro; Xiao, M.; Yamatani, M.; Yee, K.; Yoshida, A.; Yoshida, Tetsuya; Zampa, G.; Zeng, Jiancong; Zweerink, J.

doi:10.1016/j.astropartphys.2022.102791

Cited by 10 publications

(3 citation statements)

References 54 publications

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“…• GAPS [30]. This balloon experiment will measure low energy anti-nuclei by exploiting exotic atoms formation in the anti-matter annihilation in the detector.…”

Section: Future Experiments For Cr Direct Measurementsmentioning

confidence: 99%

Results from high energy direct measurements and future prospects

Adriani

Pacini

2023

EPJ Web Conf.

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“…• GAPS [30]. This balloon experiment will measure low energy anti-nuclei by exploiting exotic atoms formation in the anti-matter annihilation in the detector.…”

Section: Future Experiments For Cr Direct Measurementsmentioning

confidence: 99%

Results from high energy direct measurements and future prospects

Adriani

Pacini

2023

EPJ Web Conf.

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“…They should be produced as secondary species, like in terrestrial accelerators, by the collisions of CR primaries on Galactic gas. The General Antiparticle Spectrometer (GAPS) is about to fly and will measure the p flux below 200 MeV [37]. The instrument is devised to disentangle antiprotons from antideuterons.…”

Section: Anti-nuclei -The New Frontiermentioning

confidence: 99%

What charged cosmic rays tell us on dark matter

Salati

2023

SciPost Phys. Proc.

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Dark matter particles could be the major component of the haloes of galaxies. Their mutual annihilations or decays would produce an indirect signature under the form of high-energy cosmic-rays. The focus of this presentation is on antimatter species, a component so rare that any excess over the background should be easily detected. After a recap on Galactic propagation, I will discuss positrons, antiprotons and anti-nuclei. For each of these species, anomalies have been reported. The antiproton excess, for instance, is currently a hot topic. Alas, it does not resist a correct treatment of theoretical and data errors.

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“…GAPS is expected to measure about 500 antiprotons per 30-day flight in an energy range of ≈ 0.07 − 0.21 GeV/𝑛 at the top of the atmosphere. Not relying on the more traditional approach of a magnetic spectrometer, this measurement will provide a sizeable sample with orthogonal systematics in an energy range where no previous measurements have been conducted [9]. The analysis considers downgoing primaries with 0.25 < 𝛽 < 0.65.…”

Section: Antiproton Spectrummentioning

confidence: 99%

The GAPS experiment - a search for light cosmic ray antinuclei

Stoeßl¹

2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

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The General Anti Particle Spectrometer (GAPS) is a balloon-borne cosmic-ray experiment which is currently in its last phase of construction, undergoing system testing, and scheduled for a longduration balloon flight from McMurdo Station in the Antarctic in December 2024. Its primary scientific goal is the search for light antinuclei in cosmic rays at kinetic energies below 0.25 GeV/𝑛. This energy region is especially of interest for beyond-the-standard model dark matter searches and is still mostly uncharted. Searches for light antimatter nuclei with energies below 0.25 GeV/𝑛 are a novel approach to the search for dark matter because wide range of dark matter models proposes annihilation or decay into matter-antimatter pairs. GAPS will yield unprecedented sensitivity to low-energy antideuterons and will measure the low-energy antiproton spectrum with high statistics and precision. To reach the required sensitivity, the GAPS detector incorporates a new approach for antimatter detection, utilizing a tracker with custom, lithium-drifted silicon detectors, designed to measure the X-ray cascade expected from antimatter capture and charged particles from the subsequent annihilation. It also utilizes a fast time-of-flight system, allowing for a high-precision beta measurement. This proceeding highlights GAPS scientific goals.

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Sensitivity of the GAPS experiment to low-energy cosmic-ray antiprotons

Cited by 10 publications

References 54 publications

Results from high energy direct measurements and future prospects

Results from high energy direct measurements and future prospects

What charged cosmic rays tell us on dark matter

The GAPS experiment - a search for light cosmic ray antinuclei

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