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TeV Particle Astrophysics 2011

1–5 Aug 2011
AlbaNova University Center
Europe/Stockholm timezone

Session

Particle physics

PP
5 Aug 2011, 14:00
AlbaNova University Center

AlbaNova University Center

Presentation materials

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  1. 418. Constraints on the dark matter properties from radiative decays
    Alejandro Ibarra (TUM)
    05/08/2011, 14:00
    Particle Physics
    Oral
    Dark matter particles which decay into charged fermions produce, via radiative corrections, monoenergetic gamma rays with a branching ratio that depends on the details of the dark matter model. We analyze in this talk the prospects to detect monoenergetic gamma-rays from radiative dark matter decays at present and future experiments. We also discuss the implications for concrete models of...
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  2. 415. The GERDA Experiment: A Search for Neutrinoless Double Beta Decay
    Ms Francis Froborg (University of Zurich)
    05/08/2011, 14:20
    Particle Physics
    Oral
    The GERDA experiment uses the neutrinoless double beta decay to probe three fundamental questions in neutrino physics - Are they Dirac or Majorana particles? What is their absolute mass? What is the mass hierarchy of the three generations? It uses high-purity germanium detectors enriched in Ge-76 which are submerged nakedly in liquid argon. Due to an expected half life of the neutrinoless...
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  3. 414. keV sterile neutrino Dark Matter as alternative to the TeV scale
    Dr Alexander Merle (Royal Institute of Technology (KTH))
    05/08/2011, 14:40
    Particle Physics
    Oral
    When thinking about Dark Matter, one always has the typical WIMP with a mass of a few 100 GeV in mind. In this talk, we will argue that another valid possibility is to have sterile neutrinos at the keV scale ("Warm Dark Matter"), which can yield the correct Dark Matter abundance when, e.g., produced non-thermally. The crucial advantage of this framework is that we need some type of...
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  4. 417. Number-theory dark matter
    Prof. Fuminobu Takahashi (Tohoku University)
    05/08/2011, 15:00
    Particle Physics
    Oral
    We propose that the stability of dark matter is ensured by a discrete subgroup of the U(1)B-L gauge symmetry, Z_2(B-L). We introduce a set of chiral fermions charged under the U(1)B-L in addition to the right-handed neutrinos, and require the anomaly- cancellation conditions associated with the U(1)B-L gauge symmetry. We find that the possible number of fermions and their charges are...
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  5. 421. Updated CMB constraints on DM annihilation cross-section
    Fabio Iocco (Institute d'Astrophysique de Paris)
    05/08/2011, 16:00
    Particle Physics
    Oral
    New CMB measurements of the cosmic microwave background anisotropies permit to place strong constraints on the DM annihilation cross section at epochs very close to that of Recombination. Such constraints do not suffer from "systematic astrophysical uncertinties" such as the dependence on the halo shape and concetration, halo minimal mass, depending only on the cosmological parameters....
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  6. 428. Dark Forces at the Tevatron
    Matthew Buckley (Fermilab)
    05/08/2011, 16:20
    Particle Physics
    Oral
    The anomaly reported recently by CDF can be well fit by a massive Z' coupling primarily to baryons. The U(1) gauge group associated with such a Z' is anomalous in the Standard Model; and so additional particle content is required. In this talk, I discuss two possible UV theories which include a leptophobic Z', and demonstrate that these models generically contain a viable dark matter...
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