Determination of the cosmic antideuteron flux in a Monte Carlo approach

Ibarra, Alejandro; Wild, Sebastian

doi:10.1103/physrevd.88.023014

Cited by 49 publications

(95 citation statements)

References 71 publications

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“…Thus, this background flux is mainly the sum of the contributions of six different reactions: p p, p He, He p, He He,p p andp He. As shown in [42] for the case of anti-deuterons, the weights of these contributions are not the same in the different energy ranges but the flux produced by p p collisions largely dominate over the others (apart from the extremely low energy tail, in which the contribution from thē p p andp He processes can be sizable).…”

Section: A Determination Of the Astrophysical Backgroundmentioning

confidence: 96%

Anti-helium from dark matter annihilations

Cirelli

Fornengo

Taoso

et al. 2014

J. High Energ. Phys.

112

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Galactic Dark Matter (DM) annihilations can produce cosmic-ray anti-nuclei via the nuclear coalescence of the anti-protons and anti-neutrons originated directly from the annihilation process. Since anti-deuterons have been shown to offer a distinctive DM signal, with potentially good prospects for detection in large portions of the DM-particle parameter space, we explore here the production of heavier anti-nuclei, specifically antihelium. Even more than for anti-deuterons, the DM-produced anti-He flux can be mostly prominent over the astrophysical anti-He background at low kinetic energies, typically below 3-5 GeV/n. However, the larger number of anti-nucleons involved in the formation process makes the anti-He flux extremely small. We therefore explore, for a few DM benchmark cases, whether the yield is sufficient to allow for anti-He detection in currentgeneration experiments, such as Ams-02. We account for the uncertainties due to the propagation in the Galaxy and to the uncertain details of the coalescence process, and we consider the constraints already imposed by anti-proton searches. We find that only for very optimistic configurations might it be possible to achieve detection with current generation detectors. We estimate that, in more realistic configurations, an increase in experimental sensitivity at low kinetic energies of about a factor of 500-1000 would allow to start probing DM through the rare cosmic anti-He production.

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Section: A Determination Of the Astrophysical Backgroundmentioning

confidence: 96%

Anti-helium from dark matter annihilations

Cirelli

Fornengo

Taoso

et al. 2014

J. High Energ. Phys.

112

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“…More recently, however, a recalculation of the astrophysical antideuteron flux was performed in Ref. [35] using the more correct per-event coalescence in Monte Carlo event generators. This leads to an expected antideuteron background that is a factor ∼ 2 lower than the previous estimates.…”

Section: Antideuteron Flux At Earth a Astrophysical Backgroundmentioning

confidence: 99%

Antideuteron limits on decaying dark matter with a tuned formation model

Dal

Raklev

2014

Phys. Rev. D

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We investigate the production of antideuterons from decaying dark matter, using gravitinos in supersymmetric models with trilinear R-parity violating (RPV) operators as an example. The model used for antideuteron formation is shown to induce large uncertainties in the predicted flux, comparable to uncertainties from cosmic-ray propagation models. We improve on the formation model by tuning hadronization and coalescence parameters in Monte Carlo simulations to better reproduce the hadron spectra relevant for antideuteron production. In light of current bounds on fluxes and future prospects from the AMS-02 and GAPS experiments we set limits on RPV couplings as a function of the gravitino mass.

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“…The relatively flat peak is located at E ∼ 0.2 GeV/n. The antideuteron flux due to the cosmic-ray interactions with the interstellar medium (secondary/tertiary flux, red dashed line) is also shown in Figure 1 [12,13,14]. Unlike primary antideuterons, collision kinematics suppress the formation of low-energy secondary antideuterons.…”

Section: Antideuterons For Dark Matter Searchmentioning

confidence: 99%

“…The blue dashed line (LZP), black dotted line (LSP), and green dot-dashed line (LKP) represent the primary antideuteron fluxes due to the dark matter annihilations [11]. The red solid line represents the secondary/tertiary flux due to the cosmic-ray interactions [12,13,14].…”

Section: Antideuterons For Dark Matter Searchmentioning

confidence: 99%

A measurement of atomic X-ray yields in exotic atoms and implications for an antideuteron-based dark matter search

Aramaki

Chan

Craig

et al. 2013

Astroparticle Physics

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The General AntiParticle Spectrometer (GAPS) is a novel approach for the indirect dark matter search that exploits cosmic antideuterons. GAPS utilizes a distinctive detection method using atomic X-rays and charged particles from the exotic atom as well as the timing, stopping range and dE/dX energy deposit of the incoming particle, which provides excellent antideuteron identification. In anticipation of a future balloon experiment, an accelerator test was conducted in 2004 and 2005 at KEK, Japan, in order to prove the concept and to precisely measure the X-ray yields of antiprotonic exotic atoms formed with different target materials [1]. The X-ray yields of the exotic atoms with Al and S targets were obtained as ∼ 75%, which are higher than were previously assumed in [2]. A simple, but comprehensive cascade model has been developed not only to evaluate the measurement results but also to predict the X-ray yields of the exotic atoms formed with any materials in the GAPS instrument. The cascade model is extendable to any kind of exotic atom (any negatively charged cascading particles with any target materials), and it was compared and validated with other experimental data and cascade models for muonic and antiprotonic exotic atoms. The X-ray yields of the antideuteronic exotic atoms are predicted with a simple cascade model and the sensitivity for the GAPS antideuteron search was estimated for the proposed long duration balloon program [3], which suggests that GAPS has a strong potential to detect antideuterons as a dark matter signature. A GAPS prototype flight (pGAPS) was launched successfully from the JAXA/ISAS balloon facility in Hokkaido, Japan in summer 2012 [4,5] and a proposed GAPS science flight is to fly from Antarctica in the austral summer of 2017-2018.

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Determination of the cosmic antideuteron flux in a Monte Carlo approach

Cited by 49 publications

References 71 publications

Anti-helium from dark matter annihilations

Anti-helium from dark matter annihilations

Antideuteron limits on decaying dark matter with a tuned formation model

A measurement of atomic X-ray yields in exotic atoms and implications for an antideuteron-based dark matter search

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