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B Is Dark Matter in the 100GeV range

  1. Mar 20, 2017 #1

    wolram

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    arXiv:1703.05772 [pdf, other]

    Newly-Discovered Anomalies in Galactic Cosmic Rays: Time for Exotic Scenarios?
    Mikhail Malkov
    Comments: Cosmic Rays beyond the Standard Model, San Vito, 2016, this http URL, conference paper
    Subjects: High Energy Astrophysical Phenomena (astro-ph.HE)

    Recent observations of galactic cosmic rays (CR) in the 1-500 GeV energy range have revealed striking deviations from what deemed "standard." The anomalies cut across hadronic and leptonic CRs. I discuss findings that challenge physical mechanisms long held responsible for the CR production in galactic supernova remnants (SNR). I also consider some new physics of particle acceleration in SNR shocks that is not part of conventional models but may explain the anomalies. However, a possible 20-30\% excess remains unaccounted for in the e+/e+ ratio over the range of a few 100 GeV. If not explained by future models, it suggests an additional source of positrons such as a dark matter decay/annihilation or pulsar contribution. Earlier efforts to explain both the e+/e− and p/He anomalies with the "standard" models by adjusting the SNR environmental parameters and multiple sources are critically assessed.

    Just as the title says, Is Dark Mater expected to be in the 100GeV range?
    Thanks for replies.
     
  2. jcsd
  3. Mar 20, 2017 #2

    Chalnoth

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    I don't know about 'expected', but it's certainly in the prime mass range for a variety of WIMP proposals. SUSY models in particular expect a mass in this range.

    Section 3 of this paper has a nice graphic that shows the current status of the theoretical predictions (as well as direct dark matter searches):
    https://arxiv.org/pdf/1406.5200.pdf
     
  4. Mar 20, 2017 #3

    wolram

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    Thanks for reply Chalnoth, I hope that the Dark Matter particle is found soon as it seems some detectors will be closing down soon, I guess that a solid energy range would accelerate research, but how are we going to get a 3 sigma result from all the noise?
     
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