Testing The Light Dark Matter Hypothesis With AMS

Abstract

The spectrum and morphology of gamma-rays from the Galactic Center and the spectrum of synchrotron emission observed from the Milky Way's radio filaments have each been interpreted as possible signals of $\sim$7-10 GeV dark matter particles annihilating in the Inner Galaxy. In dark matter models capable of producing these signals, the annihilations should also generate significant fluxes of $\sim$7-10 GeV positrons which can lead to a distinctive bump-like feature in local cosmic ray positron spectrum. In this letter, we show that while such a feature would be difficult to detect with PAMELA, it would likely be identifiable by the currently operating AMS experiment. As no known astrophysical sources or mechanisms are likely to produce such a sharp feature, the observation of a positron bump at around 7-10 GeV would significantly strengthen the case for a dark matter interpretation of the reported gamma-ray and radio anomalies.

(4 pages, 2 figues)

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Cited by in corpus (16)

• Search for Low-Mass WIMPs with SuperCDMS
• Galactic Searches for Dark Matter
• New limits on dark matter annihilation from AMS cosmic ray positron data
• Searching for low-mass dark matter particles with a massive Ge bolometer operated above-ground
• Dark matter annihilations and decays after the AMS-02 positron measurements
• Physics at the e+ e- Linear Collider
• Model-Independent Indirect Detection Constraints on Hidden Sector Dark Matter
• Signals of a Light Dark Force in the Galactic Center
• Optimizing EDELWEISS detectors for low-mass WIMP searches
• Multimediator models for the galactic center gamma ray excess
• Strongly self-interacting vector dark matter via freeze-in
• Is it possible to discover a dark matter particle with an accelerator?
• Tau Portal Dark Matter models at the LHC
• Study of WIMP annihilations into a pair of on-shell scalar mediators
• Strong Dark Matter Self-Interaction from a Stable Scalar Mediator
• Sub-GeV Dark Matter Searches with EDELWEISS: New results and prospects