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UCLA Dark Matter 2020 Conference

25–28 Mar 2020
UCLA
US/Pacific timezone

dm20@physics.ucla.edu

Session

Session 10

10
26 Mar 2020, 16:30
PAB- 1-425 (UCLA)

PAB- 1-425

UCLA

UCLA Department of Physics and Astronomy 475 Portola Plaza, Los Angeles, CA 90095

Presentation materials

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  1. 32. Supersymmetric dark matter candidates: wimps and axions
    Howard Baer (University of Oklahoma)
    26/03/2020, 16:30
    Dark matter theory
    Talk

    In this talk I will review the present status of supersymmetric dark matter candidates for 2020, in light of recent LHC and wimp direct detection limits.
    Naturalness in the EW sector implies higgsino-like LSPs which are thermally underproduced while naturalness in the QCD sector seems to require the axion.
    In fact, SUSY helps solve a major problem for axions: it can generate the needed...

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  2. 16. Prospects for DM Direct Detection in (non-)SUSY models
    Sven Heinemeyer (CSIC (Madrid, ES))
    26/03/2020, 16:45
    Dark matter theory
    Talk

    We perform global fits on various SUSY models as well as on simplified DM models with leptophobic/philic mediators. These fits take into account astrophysical data (relic abundance and DD limits), searches at the LHC as well as other measurements (Higgs, low-energy and flavor observables). Based on these fits we predict the favored ranges for DM masses and Direct Detection cross sections. In...

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  3. 129. Effective theory of nuclear scattering for WIMPs of arbitrary spin
    Paolo Gondolo (University of Utah)
    26/03/2020, 17:00
    Dark matter theory
    Talk

    We have extended the nonrelativistic effective theory of WIMP-nucleus scattering from WIMPs of spin 0, 1/2, and 1 to WIMPs of arbitrary spin, under the assumption of one-nucleon operators. New effective operators arise at each additional half-unit of WIMP spin. The nuclear structure functions are the same for WIMPs of all spin. The theory can easily include mediators of any mass, and form...

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  4. 128. Axion strings and axion dark matter
    Prof. Yanou Cui (University of California, Riverside)
    26/03/2020, 17:15
    Dark matter theory
    Talk

    to be added

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  5. 61. Axiogenesis and Kinetic Misalignment Mechanism
    Dr Raymond Co (University of Michigan)
    26/03/2020, 17:30
    Dark matter theory
    Talk

    We proposed a mechanism called axiogenesis to explain the observed cosmological excess of matter over antimatter. A rotation of the QCD axion is induced by explicit Peccei-Quinn symmetry breaking in the early universe. The rotation corresponds to the asymmetry of the PQ charge, which is converted into the baryon asymmetry via QCD and electroweak sphaleron transitions. Such a rotation also...

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  6. 12. The QCD Axion and Unification
    Alexis Plascencia (Case Western Reserve University)
    26/03/2020, 17:45
    Axions, Alps, Wisps as dark matter
    Talk

    The QCD axion is one of the most appealing candidates for the dark matter in the Universe. In this talk, I will discuss the possibility to predict the axion mass in the context of renormalizable grand unified theories where the Peccei-Quinn scale is determined by the unification scale. In the minimal theory with the KSVZ mechanism the axion mass is predicted to be in the range m = (3 - 13)...

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  7. 13. Black hole spectroscopy of dark matter and dark sector at future colliders
    Ningqiang Song (Queen's University)
    26/03/2020, 18:00
    Dark matter searches at accelerators
    Talk

    If the length scale of possible extra dimensions is large enough, the effective Planck scale is lowered such that microscopic black holes could be produced in collisions of high-energy particles at colliders. These black holes evaporate through Hawking radiation of a handful of energetic particles drawn from the set of all kinematically and thermally allowed degrees of freedom, including dark...

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  8. 45. Uncertainties in Direct Dark Matter Detection in Light of Gaia's Escape Velocity Measurements
    Youjia Wu (University of Michigan)
    26/03/2020, 18:15
    Dark matter theory
    Talk

    Direct detection experiments have set increasingly stringent limits on the cross section for spin-independent dark matter-nucleon interactions. In obtaining such limits, experiments primarily assume the standard halo model (SHM) as the distribution of dark matter in our Milky Way. Three astrophysical parameters are required to define the SHM: the local dark matter escape velocity, the local...

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  9. 65. Dynamics of millicharged dark matter in supernova remnants
    Jung-Tsung Li (UC San Diego)
    26/03/2020, 18:30
    Dark matter theory
    Talk

    Millicharged dark matter (mDM) would form a plasma and interact with the interstellar medium and electromagnetic fields within galaxies. In this presentation, I will show a microphysical model where mDM is shocked by a supernova remnant and isotropized in the frame of the expanding fluid. We find that for $|q_\chi/m_\chi| > 10^{-13} e/{\rm MeV}$, the isotropization length for electromagnetic...

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  10. 29. A multicomponent dark matter scenario consistent with experiment
    Roland Allen (Texas A&M University)
    26/03/2020, 18:45
    Dark matter theory
    Talk

    We review a dark matter scenario [1-6] which is consistent with recent analyses of observations from Fermi-LAT, AMS-02, and Planck. In this scenario, with both supersymmetry and an extended Higgs sector, the mass of the dominant dark matter WIMP is rigorously ≤ 125 GeV/c$^2$, its gauge couplings are precisely defined, and its Higgs-mediated couplings should be comparable to those of a...

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