SUSYDM-PHEN · Supersymmetric Dark Matter and Collider Phenomenology
FP7 — People (Marie Curie Actions)
- Duration
- 2007-09-01 → 2011-08-31
- EU contribution
- €100,000
- Participants
- 2
- Scheme
- MC-IRG
Lines connect the coordinator with its partners.
Results in brief
Supersymmetric Dark Matter and Collider Phenomenology
In the following years the interplay between cosmology and particle physics will provide us with detailed information about the nature of the physics that lies beyond the Standard Model (SM) of particle physics, especially in the eve of large experimental projects in particle physics and cosmology, where the European contribution is expected to be significant: the Large Hadron Collider (LHC) at CERN, the PLANCK satellite, new neutrinos telescopes etc. In this project we focus our attention on topics about Dark Matter (DM), where information can be shared between these two main fields of physics. Supersymmetry (SUSY) is probably the best motivated extension of SM, since it answers the main theoretical weakness of the SM, that is the stability of the Higgs potential. In addition, it provides an explanation of electroweak symmetry breaking though radiative corrections, as well as a conceptual framework for unifying all the interactions of SM, including gravity in the context of its local version, supergravity (SUGRA). One of the most appealing features of the SUSY models is that, they can provide us with a stable neutral particle a suitable candidate for the DM constituent. This is the lightest supersymmetric particle (LSP). In most SUSY models this is the lightest neutralino, an admixture of the super- partners of the photon and the Higgs and Z-bosons. Within this framework the main objectives of this proposal are: • calculation of the DM abundance and the study of direct and indirect DM signatures in supersymmetric models with CP violation • baryogenesis through leptogenesis in the context of supersymmetric Grant Unified Theory (GUT) models • study of scenarios where the gravitino playing the role of the DM constituent and • interplay between DM and Dark Energy in the context of GUT String based models. According to the work plan during the first year of the reintegration project, the researcher was mainly concentrated into the following topics: 1) phenomenology of supersymmetric models with explicit CP-violation phases and 2) scenarios with gravitino DM.
Data: CORDIS, © European Union
Project objective
The compilation of the recent cosmological data from experiments in cosmology and astrophysics, and in particular of those of the WMAP satellite, confirm with greater accuracy the standard cosmological model. According to them the current energy density of the Universe is comprised by about 70% of dark energy and 30% of matter, most of which is in the form of non-baryonic dark matter (DM). It has been appreciated for some time that the lightest supersymmetric particle (LSP) is a suitable candidate for this non-baryonic cold dark matter. The LSP is stable in supersymmetric models where R-parity is conserved, and its relic density falls naturally within the favoured range if it weighs less than 1 TeV. In this case the most of the parameter space of the supersymmetric models can be explored by the future high energy experiments, like these that will be performed at LHC collider at CERN after about two years and at the International Linear Collider some years later. This, in conjunction with the upcoming information from projects like the PLANCK satellite and the various neutrinos telescopes, will provide us with the unique opportunity to comprehend the fundamental physics beyond the Standard Model of the particle physics. We will study the effect of the presence of CP violating phases on direct and indirect DM experiments, in the context of variants of the Minimal Supersymmetric Standard Model (MSSM), and we will impose the cosmological constraints by estimating precisely the neutralino relic density. In doing so, we will explore the complementarity between the accelerator and DM searches. In addition, we will investigate the possibility of baryogenesis through leptogenesis in this framework. On the other hand, we will study the possibility that the LSP is the gravitino, the supersymmetric partner of the graviton, and we will explore the interplay between the DM and the Dark Energy, in the context of grand unified and string models.
Original text from CORDIS.
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Data: CORDIS, © European Union