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The Mitchell Conference on Collider, Dark Matter, and Neutrino Physics 2019

15–17 May 2019
US/Central timezone

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Session

Dark Matter

16 May 2019, 09:00

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  1. 15. ALPs: What can we learn from neutron stars and X-ray astronomy?
    Kuver Sinha
    16/05/2019, 09:00

    Axion-like particles (ALPs) produced in the core of a neutron star can convert to photons in the magnetosphere, leading to possible signatures in the soft and hard X-ray emission from these sources. We study these signatures taking the magnetar SGR 1806-20 as an example. In particular, assuming ALP emission rates from the core that are just subdominant to neutrino emission, the parameter...

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  2. 39. Probing axions with X-ray observations of magnetic white dwarfs
    Andrew Long (University of Michigan - LCTP)
    16/05/2019, 09:25

    Axions are hypothetical particles that couple extremely weakly to regular matter, which makes them challenging to probe in the laboratory. However, axions should be produced in the dense environments of compact stars, providing an additional cooling channel that leads to well-known constraints on the axion’s couplings to matter. These constraints are indirect, and although compact stars are...

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  3. 29. Heating up Neutron Stars with Dark Matter
    Nicole Bell (University of Melbourne)
    16/05/2019, 09:50
  4. 32. Searching for Boosted Dark Matter via Dark-Strahlung
    Doojin Kim (University of Arizona (US))
    16/05/2019, 13:30

    I discuss an unprecedented search channel for boosted dark matter (BDM) signals coming from the present universe. The signal process is initiated by the scattering of high-energy BDM off an electron/nucleon. If the dark matter (DM) is dark-sector U(1)-charged, the scattered BDM may emit a dark gauge boson (called "dark-strahlung") decaying to a SM fermion pair. In fact, the existence of this...

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  5. 45. Gas Clouds as Dark Matter Detectors
    Joseph Bramante (Queen's University & Perimeter Institute)
    16/05/2019, 13:55

    Cold gas clouds in the Milky Way have the potential to discover dark matter. Sensitivity to dark matter models including strongly-interacting, millicharged, and superheavy dark matter will be presented. The basic logic behind gas cloud bounds on dark matter will also be discussed.

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  6. 52. Seeing the Light of Dark Matter
    Graham Kribs
    16/05/2019, 14:20

    Repurposing large underground detectors to search
    for the photon signal of inelastic dark matter

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  7. 9. Gamma-Ray Signals From Velocity-Dependent Dark Matter Annihilation
    Jason Kumar
    16/05/2019, 15:10
  8. 13. Probing Exotic(Dark) Compact Objects with Extreme Mass Ratio Inspirals
    Huaike Guo
    16/05/2019, 15:35

    Exotic compact objects(ECO) like primordial black holes, boson stars, etc.,
    are interesting astrophysical targets and can serve as dark matter candidates. Their existence, however, is still in doubt. In this talk, I will discuss the
    possibility of using the gravitational waves from the extreme mass ratio
    inspiral(EMRI) as a new way of probing the ECOs and show that future space-based...

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  9. 33. Gamma-ray observations of M31 and dark matter implications
    Prof. Simona Murgia (University of California, Irvine)
    16/05/2019, 16:00

    In this talk I will discuss recent observations of the Andromeda galaxy in gamma rays and implications for dark matter.

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  10. 43. Astrophysical Aspects of Secretly Asymmetric Dark Matter
    Can Kilic (University of Texas at Austin)
    16/05/2019, 16:50

    I will present the phenomenology of the Secretly Asymmetric Dark Matter (SADM) scenario, where the DM relic abundance is set through an asymmetry generated in multiple DM flavors in the early universe, despite an unbroken and gauged DM number symmetry. There is a massless dark photon associated with the DM number symmetry, and DM flavors with asymmetries of opposite signs can form bound...

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  11. 46. Co-Decaying Dark Matter and its Cosmological Signatures
    Brandon Melcher (Syracuse University)
    16/05/2019, 17:15

    This talk will mostly follow the discussions found in https://arxiv.org/abs/1711.04773 and https://arxiv.org/abs/1902.04082. We will discuss the cosmological implications of the Co-Decaying Dark Matter Model--a recently proposed mechanism for depleting the density of dark matter through the decay of nearly degenerate particles. This model generically predicts the existence of an Early Matter...

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  12. 50. Dark Matter In and Out of Equilibrium
    Dr Julia Shelton
    16/05/2019, 17:40

    One generic scenario for the dark matter of our universe is that it resides in a hidden sector: it talks to other dark fields more strongly than it talks to the Standard Model. I'll discuss some simple, WIMP-y models of this kind of hidden sector dark matter, paying particular attention to what we can learn from the cosmic history of the dark sector. In particular, the need to populate the...

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