Gamma Ray and Neutrino Flux from Annihilation of Neutralino Dark Matter at Galactic Halo Region in mAMSB Model

Journal of Physics G Nuclear and Particle Physics (Impact Factor: 5.33). 05/2012; 40:075201. DOI: 10.1088/0954-3899/40/7/075201
Source: arXiv

ABSTRACT We consider the lightest supersymmetric particle (LSP), neutralino in minimal
anomaly mediated supersymmetry breaking model (mAMSB) to be a possible
candidate for weakly interacting massive particles (WIMP) or cold dark matter
and investigate its direct and indirect detections. The theoretically allowed
supersymmetric parametric space for such a model along with the recent bounds
from LHC is constrained by the WMAP results for relic densities. The spin
independent and spin dependent scattering cross sections for dark matter off
nucleon are thus constrained from the WMAP results. They are found to be within
the allowed regions of different ongoing direct detection experiments. The
annihilation of such dark matter candidates at the galactic centre produce
different standard model particles such as gamma rays, neutrinos etc. In this
work, we calculate the possible fluxes of these $\gamma$-rays and neutrinos
coming from the direction of the galactic centre (and its neighbourhood) at
terrestrial or satellite borne detectors. The calcutated $\gamma$-ray flux is
compared with the observational results of HESS experiment. The neutrino flux
of different flavours from the galactic centre and at different locations away
from the galactic centre produced by WIMP annihilation in this model are also
obtained for four types of galactic dark matter halo profiles. The detection
prospects of such $\nu_\mu$ coming from the direction of the galactic centre at
the ANTARES under sea detector are discussed in terms of muon signal yield from
these muon neutrinos. Both the gamma and neutrino signals are estimated for
four different dark matter halo profiles.

  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: In this review article, we discuss the current status of particle dark matter, including experimental evidence and theoretical motivations. We discuss a wide array of candidates for particle dark matter, but focus on neutralinos in models of supersymmetry and Kaluza-Klein dark matter in models of universal extra dimensions. We devote much of our attention to direct and indirect detection techniques, the constraints placed by these experiments and the reach of future experimental efforts.
    Physics Reports 05/2004; · 22.93 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We have performed the underground dark matter search experiment with a sodium fluoride (NaF) bolometer array from 2002 through 2003 at Kamioka Observatory (2700 m.w.e.). The bolometer array consists of eight NaF absorbers with a total mass of 176 g, and sensitive NTD germanium thermistors glued to each of them. This experiment aims for the direct detection of weakly interacting massive particles (WIMPs) via spin-dependent interaction. With an exposure of 3.38 kg days, we derived the limits on the WIMP–nucleon coupling coefficients, ap and an. These limits confirmed and tightened those derived from our previous results with the lithium fluoride (LiF) bolometer. Our results excluded the parameter space complementary to the results obtained by Nal detectors of UKDMC experiment.
    Physics Letters B 01/2003; · 4.57 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We show that in a general hidden sector model, supersymmetry breaking necessarily generates at one loop a scalar and gaugino mass as a consequence of the super-Weyl anomaly. We study a scenario in which this contribution dominates. We consider the Standard Model particles to be localized on a (3 + 1)-dimensional subspace or “3-brane” of a higher dimensional space-time, while supersymmetry breaking occurs off the 3-brane, either in the bulk or on another 3-brane. At least one extra dimension is assumed to be compactified roughly one to two orders of magnitude below the four-dimensional Planck scale. This framework is phenomenologically very attractive; it introduces new possibilities for solving the supersymmetric flavor problem, the gaugino mass problem, the supersymmetric CP problem, and the μ-problem. Furthermore, the compactification scale can be consistent with a unification of gauge and gravitational couplings. We demonstrate these claims in a four-dimensional effective theory below the compactification scale that incorporates the relevant features of the underlying higher dimensional theory and the contribution of the super-Weyl anomaly. Naturalness constraints follow not only from symmetries but also from the higher dimensional origins of the theory. We also introduce additional bulk contributions to the MSSM soft masses. This scenario is very predictive: the gaugino masses, squark masses, and A terms are given in terms of MSSM renormalization group functions.
    Nuclear Physics B 09/1999; · 4.33 Impact Factor


Available from