Ref HAL: hal-00266465_v1
Ref Arxiv: hep-th/0305172
DOI: 10.1142/S0217751X04019913
WoS: 000226729200003
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
21 Citations
Résumé:

We consider a four dimensional space-time symmetry which is a non trivial extension of the Poincar\'e algebra, different from supersymmetry and not contradicting {\sl a priori} the well-known no-go theorems. We investigate some field theoretical aspects of this new symmetry and construct invariant actions for non-interacting fermion and non-interacting boson multiplets. In the case of the bosonic multiplet, where two-form fields appear naturally, we find that this symmetry is compatible with a local U(1) gauge symmetry, only when the latter is gauge fixed by a `t Hooft-Feynman term.

Ref Arxiv: hep-ph/0212110
Ref. & Cit.: NASA ADS

DOI: 10.1007/10857580_45
WoS: 000185215300045
Résumé:

Considering a NFW halo of M 31 made of neutralinos, predictions for the \x{03B3} fluxes are computed for different sets of SUSY parameters using the DarkSuspect MC simulation [1] [2]. Then they are compared with the efficiency of CELESTE Cerenkov telescope [3] which has a threshold energy of 30 GeV.

Commentaires: Astronomy, Cosmology and Fundamental Physics:

Ref HAL: in2p3-00142888_v1
Ref Arxiv: hep-ph/0211331
DOI: 10.1016/j.cpc.2006.11.009
WoS: 000245302600004
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
623 Citations
Résumé:

We present the Fortran code SuSpect version 2.3, which calculates the Supersymmetric and Higgs particle spectrum in the Minimal Supersymmetric Standard Model (MSSM). The calculation can be performed in constrained models with universal boundary conditions at high scales such as the gravity (mSUGRA), anomaly (AMSB) or gauge (GMSB) mediated supersymmetry breaking models, but also in the non-universal MSSM case with R-parity and CP conservation. Care has been taken to treat important features such as the renormalization group evolution of parameters between low and high energy scales, the consistent implementation of radiative electroweak symmetry breaking and the calculation of the physical masses of the Higgs bosons and supersymmetric particles taking into account the dominant radiative corrections. Some checks of important theoretical and experimental features, such as the absence of non-desired minima, large fine-tuning in the electroweak symmetry breaking condition, as well as agreement with precision measurements can be performed. The program is simple to use, self-contained and can easily be linked to other codes; it is rather fast and flexible, thus allowing scans of the parameter space with several possible options and choices for model assumptions and approximations.

Commentaires: This paper and its associated computer program are available via the Computer Physics Communications homepage on ScienceDirect http://www.sciencedirect.com/science/journal/00104655)

Ref HAL: in2p3-00087404_v1
Ref Arxiv: astro-ph/0212560
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
Résumé:

It is widely believed that dark matter exists within galaxies and clusters of galaxies. Under the assumption that this dark matter is composed of the lightest, stable supersymmetric particle, assumed to be the neutralino, the feasibility of its indirect detection via observations of a diffuse gamma-ray signal due to neutralino annihilation within M31 is examined.

Commentaires: Latex, 5 pages, 3 figures, to appear in the proceedings of the French Astrophysical Society, 2002 - GAM

DOI: 10.1007/10857580_49
WoS: 000185215300049
1 Citation
Résumé:

The distant globular cluster Palomar 13 has been found to have a very high mass-to-light ratio. Its profile can be well fitted either by using a King model with a tail, or by a NFW model [1]. This cluster may be the first case of the many clumps predicted by CDM simulations that would not be disrupted by the galactic halo potential. We assume that Pal 13 is made of neutralinos and we run the DarkSuspect code for five benchmark models. This code allows to estimate the gamma-ray flux produced in annihilations of neutralinos. These fluxes may be used as targets to be reached in proposals for future ground-based high altitude Cerenkov telescopes.

Commentaires: A 2-page poster.

Ref Arxiv: astro-ph/0210184
DOI: 10.1016/j.astropartphys.2003.07.001
WoS: 000188114800007
Ref. & Cit.: NASA ADS
17 Citations
Résumé:

t is widely believed that dark matter exists within galaxies and clusters of galaxies. Under the assumption that this dark matter is composed of the lightest, stable supersymmetric particle, assumed to be the neutralino, the feasibility of its indirect detection via observations of a diffuse gamma-ray signal due to neutralino annihilations within M31 is examined. To this end, first the dark matter halo of the close spiral galaxy M31 is modeled from observations, then the resultant gamma-ray flux is estimated within supersymmetric model configurations. We conclude that under favorable conditions such as the rapid accretion of neutralinos on the central black hole in M31 and/or the presence of many clumps inside its halo with $r^{-3/2}$ inner profiles, a neutralino annihilation gamma-ray signal is marginally detectable by the ongoing collaboration CELESTE.