Indirect Detection of Neutralino Dark Matter with Neutrino Telescopes

Principle of neutralino dark matter detection with neutrino telescopes and predictions are reviewed. The future Antares detector is described. Prospection in the CMSSM is exposed including comparison with experiment sensitivities of both neutrino indirect detection and direct detection experiments. Results in other frameworks are shortly surveyed. Models with a non negligible neutralino higgsino fraction are promising for neutrino telescopes detection.Comment: Talk given at SUSY02, Desy, Hambourg, Germany June 17-2

Baryonic and dark matter distribution in cosmological simulations of spiral galaxies

We study three cosmological hydrodynamical simulations of Milky Way(MW)-sized halos including a comparison with the dark matter(DM)-only counterparts. We find one of our simulated galaxies with interesting MW-like features. Thanks to a consistently tuned star formation rate and supernovae feedback we obtain an extended disk and a flat rotation curve with a satisfying circular velocity and a reasonable DM density in the solar neighbourhood. Mimicking observational methods, we re-derive the stellar mass and obtain stellar-to-halo mass ratios reduced by more than 50\%. We show the interaction between the baryons and the dark matter which is first contracted by star formation and then cored by feedback processes. Indeed, we report an unprecedentedly observed effect in the DM density profile consisting of a central core combined with an adiabatic contraction at larger galactic radii. The cores obtained are typically $\sim$ 5 kpc large. Moreover, this also impacts the DM density at the solar radius. In our simulation resembling most to the MW, the density is raised from 0.23 GeV/cm$^3$ in the dark matter only run to 0.36 GeV/cm$^3$ (spherical shell) or 0.54 GeV/cm$^3$ (circular ring) in the hydrodynamical run. Studying the subhalos, the dark matter within luminous satellites is also affected by baryonic processes and exihibits cored profiles whereas dark satellites are cuspy. We find a shift in mass compared to DM-only simulations and obtain, for halos in the lower MW mass range, a distribution of luminous satellites comparable to the MW spheroidal dwarf galaxies.Comment: matches version accepted in MNRAS, 17 pages, 15 figures, text improved, satellite section extende

Neutrino Indirect Detection of Neutralino Dark Matter in the CMSSM

We study potential signals of neutralino dark matter indirect detection by neutrino telescopes in a wide range of CMSSM parameters. We also compare with direct detection potential signals taking into account in both cases present and future experiment sensitivities. Only models with neutralino annihilation into gauge bosons can satisfy cosmological constraints and current neutrino indirect detection sensitivities. For both direct and indirect detection, only next generation experiments will be able to really test this kind of models.Comment: 16 pages, 19 figures; v4: a few clarifications and significant improvement of reference

Indirect Detection of CMSSM Neutralino Dark Matter with Neutrino Telescopes

We review the prospects of detecting supersymmetric dark matter in the framework of the Constrained Minimal Supersymmetric Standard Model, and compare indirect with direct detection capabilities.Comment: 6 pages, 4 figures, presented by J. Orloff at the York IDM02 workshop (http://www.shef.ac.uk/~phys/idm2002

Direct and Indirect Detection of Dark Matter in Heterotic Orbifold Models

We study the neutralino dark matter phenomenology in the context of effective field theories derived from the weakly--coupled heterotic string. We consider in particular direct detection and indirect detection with neutrino telescopes rates. The two cases of moduli dominated and dilaton dominated SUSY breaking lead to completely different phenomenologies. Even if in both cases relic density constraints can be fulfilled, moduli domination generically leads to detection rates which are much below the present and future experimental sensitivities, whereas dilaton domination gives high detection rates accessible to the next generation of experiments. This could make dark matter searches an alternative way to constrain high energy fundamental parameters.Comment: 29 pages, 13 figures. Notations clarified, figures improved, typos and english correcte

Neutrino Mass Patterns within the See-saw Model from Multi-localization along Extra Dimensions

We study a multi-localization model for charged leptons and neutrinos, including the possibility of a see-saw mechanism. This framework offers the opportunity to allow for realistic solutions in a consistent model without fine-tuning of parameters, even if quarks are also considered. Those solutions predict that the large Majorana mass eigenvalues for right-handed neutrinos are of the same order of magnitude, although this almost common mass can span a large range (bounded from above by $\sim 10^{12}{\rm GeV}$). The model also predicts Majorana masses between $\sim 10^{-2}{\rm eV}$ and $\sim 5 \ 10^{-2}{\rm eV}$for the left-handed neutrinos, both in the normal and inverted mass hierarchy cases. This mass interval corresponds to sensitivities which are reachable by proposed neutrinoless double$\beta$decay experiments. The preferred range for leptonic mixing angle$\theta_{13}$is:$10^{-2} \lesssim \sin \theta_{13} \lesssim 10^{-1}$, but smaller values are not totally excluded by the model.Comment: 36 pages, 8 figure

La revisitation du mythe de la catabase dans Il giardino dei Finzi Contini de Giorgio Bassani

International audienceBassani usa lo schema e il mitema della catabasi, della discesa agli Inferi, insieme classica, antica e dantesca, adattandola a una situazione molto particolare : non più quella di Enea, esule troiano, o di Dante, esule fiorentino, ma quella di un giovane proscritto ebreo durante la Shoà che vive l’inferno della passione e delle persecuzioni. In Bassani, il lettore si trova allora di fronte a un’inversione, anzi a una parodia del mito della catabasi e della Divina Commedia. Il viaggio del protagonista, terrestre e profano, è cronologicamente invertito rispetto al modello dantesco : il giovane visita prima il paradiso accanto all’essere amato, Micòl, moderna sibilla o moderna Beatrice, poi conosce un periodo di Purgatorio nella dimora di lei, prima di scendere all’Inferno quando è cacciato dal giardino incantato.Bassani utilise le schème et le mythème de la catabase, de la descente aux Enfers, à la fois classique, antique et dantesque, en l’adaptant à une situation tout à fait particulière : non plus celle d’Enée, exilé troyen, ou de Dante, exilé florentin, mais celle d’un jeune exilé juif durant la Shoah qui vit l’enfer de la passion et des persécutions. Chez Bassani, le lecteur est alors face à une inversion, voire à une parodie du mythe de la catabase et de la Divine Comédie. Le voyage du protagoniste, terrestre et profane, est chronologiquement inversé par rapport au modèle dantesque : le jeune homme visite d’abord le paradis aux côtés de l’être aimé, Micòl, moderne Sibylle ou moderne Béatrice, puis connaît une période de Purgatoire dans la demeure de celle-ci, avant de descendre en Enfer lorsqu’il est chassé du jardin enchanté