Cosmic antihelium-3 nuclei sensitivity of the GAPS experiment

Saffold, N.; Aramaki, T.; Bird, R.; Boezio, M.; Boggs, Steven E.; Bonvicini, V.; Campana, D.; Craig, William W.; Doetinchem, P. von; Everson, E. T.; Fabris, L.; Fuke, H.; Gahbauer, F.; García, Ignacio; Gerrity, C.; Hailey, Charles J.; Hayashi, T.; Kato, C.; Kawachi, A.; Kobayashi, Shōgo; Kozai, M.; Lenni, A.; Lowell, A.; Manghisoni, M.; Marcelli, N.; Mognet, S. I.; Munakata, K.; Munini, R.; Nakagami, Yoshihiro; Osteria, G.; Perez, K.; Pope, Isaac; Quinn, S.; Re, V.; Reed, M. W.; Riceputi, E.; Roach, Brandon; Rogers, F.; Ryan, J.; Scotti, V.; Shimizu, Yuki; Sonzogni, M.; Sparvoli, R.; Stoeßl, A.; Tiberio, A.; Vannuccini, E.; Wada, Takahiro; Xiao, M.; Yamatani, M.; Yoshida, A.; Yoshida, Tetsuya; Zampa, G.; Zweerink, J.

doi:10.1016/j.astropartphys.2021.102580

Cited by 21 publications

(21 citation statements)

References 46 publications

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“…A more detailed description of the simulation procedure can be found in [4]. For these proceedings, the simulation has been updated to use the latest version of Geant4 Geant4v1 .7.p 2.…”

Section: Generated Datasetmentioning

confidence: 99%

“…For these proceedings, the simulation has been updated to use the latest version of Geant4 Geant4v1 .7.p 2. In contrast to [4] the design of the TOF system has been altered in the simulation, to reflect current changes in the design. The effect of the utilization of the exotic X-ray lines is currently under study, and not part of this analysis.…”

Section: Generated Datasetmentioning

confidence: 99%

“…The distributions are slices from the generated 2d probability distributions, taken for the slice 0.39 < < 0.41 antiprotons, as well as remaining α. A detailed description of the variables can be found in [4]. In short, the variables used can be divided into two groups: Classification of the primary track: The pattern of the energy depositions along the primary track has strong separation power especially against | | = 1 particles since the energy loss increases quadratically with charge.…”

Section: Pos(icrc2021)499mentioning

confidence: 99%

“…GAPS probes the low-energy region nearly inaccessible to AMS-02 due to the geomagnetic cutoff, with an orthogonal technique. This work presents an update on the GAPS antihelium-3 sensitivity studies [4], including a slightly modified detector geometry, optimized to achieve to goal of a long-distance flight as well as an improved event reconstruction [5].…”

Section: Introductionmentioning

confidence: 99%

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Searching for cosmic antihelium nuclei with the GAPS experiment

Stoeßl¹

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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At low energies, cosmic antideuterons and antihelium provide an ultra-low background signature of dark matter annihilation, decay, and other beyond the Standard Model phenomena. The General Antiparticle Spectrometer (GAPS) is an Antarctic balloon experiment designed to search for lowenergy (0.1−0.3 GeV/ ) antinuclei, and is planned to launch in the austral summer of 2022. While optimized for an antideuteron search, GAPS also has unprecedented capabilites for the detection of low-energy antihelium nuclei, utilizing a novel detection technique based on the formation, decay, and annihilation of exotic atoms. The AMS-02 collaboration has recently reported several antihelium nuclei candidate events, which sets GAPS in a unique position to set constraints on the cosmic antihelium flux in an energy region which is essentially free of astrophysical background. In this contribution, we illustrate the capabilities of GAPS to search for cosmic antihelium-3 utilizing complete instrument simulations, event reconstruction, and the inclusion of atmospheric effects. We show that GAPS is capable of setting unprecedented limits on the cosmic antihelium flux, opening a new window on exotic cosmic physics.

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“…A more detailed description of the simulation procedure can be found in [4]. For these proceedings, the simulation has been updated to use the latest version of Geant4 Geant4v1 .7.p 2.…”

Section: Generated Datasetmentioning

confidence: 99%

Section: Generated Datasetmentioning

confidence: 99%

Section: Pos(icrc2021)499mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Searching for cosmic antihelium nuclei with the GAPS experiment

Stoeßl¹

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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show abstract

“…At least three flights are planned and the first is expected to be performed in the 2022/23 austral summer. During its lifetime, GAPS will improve the sensitivity for antideuteron and antihelium nuclei by at least two orders of magnitude [8,9]. Moreover, GAPS will collect the largest sample of antiprotons to date and it will extend the energy coverage in the unexplored region below 100 MeV.…”

Section: Introductionmentioning

confidence: 99%