Antideuteron sensitivity for the GAPS experiment

Aramaki, T.; Hailey, Charles J.; Boggs, Steven E.; Doetinchem, P. von; Fuke, H.; Mognet, S. I.; Ong, R. A.; Perez, K.; Zweerink, J.

doi:10.1016/j.astropartphys.2015.09.001

Cited by 97 publications

(126 citation statements)

References 35 publications

(86 reference statements)

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“…A of nuclei with mass number A formed out of Z protons and N neutrons to the invariant yields E i d 3 N i dP 3 i of protons (i = p) and neutrons (i = n) via…”

Section: Introductionmentioning

confidence: 99%

Alternative coalescence model for deuteron, tritium, helium-3 and their antinuclei

2020

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Antideuteron and antihelium nuclei have been proposed as a detection channel for dark matter annihilations and decays in the Milky Way, due to the low astrophysical background expected. To estimate both the signal for various dark matter models and the astrophysical background, one employs usually the coalescence model in a Monte Carlo framework. This allows one to treat the production of antinuclei on an event-by-event basis, taking thereby into account momentum correlations between the antinucleons involved in the process. The standard coalescence approach lacks however an underlying microscopic picture, and the numerical value of the coalescence parameter obtained from fits to different reactions varies considerably. Here we propose a coalescence model which is based on the Wigner function representations of the produced antinuclei states. This approach allows us to include in a semi-classical picture both the size of the formation region, which is process dependent, and momentum correlations. The model contains a single, universal parameter which is fixed by fitting the production spectra of antideuterons in proton-proton interactions at the Large Hadron Collider. Using this value, the model describes well the production of various antinuclei both in electron-positron annihilation and in proton-proton collisions.

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“…A of nuclei with mass number A formed out of Z protons and N neutrons to the invariant yields E i d 3 N i dP 3 i of protons (i = p) and neutrons (i = n) via…”

Section: Introductionmentioning

confidence: 99%

Alternative coalescence model for deuteron, tritium, helium-3 and their antinuclei

2020

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“…In summary, the astrophysical background for DM searches in the low-energy region appear to be soundly assessed. The search of d and He in CRs is ongoing by the AMS experiment, and soon, by the GAPS detection project [19]. …”

Section: Discussionmentioning

confidence: 99%

Production of cosmic-ray antinuclei in the Galaxy and background for dark matter searches

Tomassetti¹,

Oliva²

2017

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2017)

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Antimatter nuclei in cosmic rays (CR) represent a promising discovery channel for the indirect search of dark matter. We present astrophysical background calculations of CR antideuteron (d) and antihelium (He). These particles are produced by high-energy collisions of CR protons and nuclei with the gas nuclei of the interstellar medium. In our calculations, we also consider production and shock acceleration of antinuclei in the shells of supernova remnants (SNRs). The total flux of d and He particles is constrained using new AMS measurements on the boron/carbon (B/C) and antiproton/proton (p/p) ratios. The two ratios leads to different antiparticle fluxes in the highenergy regime E 10 GeV/n where, in particular,p/p-driven calculations leads to a significanly larger antiparticle flux in comparison to predictions from conventional B/C-driven constraints. On the other hand, both approaches provide consistent results in the sub-GeV/n energy window, which is where dark matter induced signal may exceed the astrophysical background. In this region, the total antinuclei flux, from interaction in the insterstellar gas and inside SNRs, is tightly bounded by the data. Shock-acceleration of antiparticles in SNRs has a minor influence in the astrophysical background for dark matter searches.

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“…Refilling e -X-ray X-ray X-ray project [38,39,40]. The TOF plastic scintillators measure the velocity and angle of the incoming antiparticle.…”

Section: _ Dmentioning

confidence: 99%

Dual MeV gamma-ray and dark matter observatory - GRAMS Project

Aramaki

Adrian

Karagiorgi

et al. 2020

Astroparticle Physics

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GRAMS (Gamma-Ray and AntiMatter Survey) is a novel project that can simultaneously target both astrophysical observations with MeV gamma rays and an indirect dark matter search with antimatter. The GRAMS instrument is designed with a cost-effective, large-scale LArTPC (Liquid Argon Time Projection Chamber) detector surrounded by plastic scintillators. The astrophysical observations at MeV energies have not yet been well-explored (the so-called "MeV-gap") and GRAMS can improve the sensitivity by more than an order of magnitude compared to previous experiments. While primarily focusing on MeV gamma-ray observations, GRAMS is also optimized for cosmic ray antimatter surveys to indirectly search for dark matter. In particular, low-energy antideuterons will provide an essentially background-free dark matter signature. GRAMS will be a next generation experiment beyond the current GAPS (General AntiParticle Spectrometer) project for antimatter survey.

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Antideuteron sensitivity for the GAPS experiment

Cited by 97 publications

References 35 publications

Alternative coalescence model for deuteron, tritium, helium-3 and their antinuclei

Alternative coalescence model for deuteron, tritium, helium-3 and their antinuclei

Production of cosmic-ray antinuclei in the Galaxy and background for dark matter searches

Dual MeV gamma-ray and dark matter observatory - GRAMS Project

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