On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios

Details On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios

2007-01-26

arxiv.org/abs/hep-ph/0701229v1

JHEP 0705:003,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

31 pages, 14 figures

Scientific paper

10.1088/1126-6708/2007/05/003

We analyze the possibility that the lighter stop {\tilde t_1} could be the next-to-lightest supersymmetric particle (NLSP) in models where the gravitino is the lightest supersymmetric particle (LSP). We do not find any possibility for a stop NLSP in the constrained MSSM with universal input soft supersymmetry-breaking masses at the GUT scale (CMSSM), but do find small allowed regions in models with non-universal Higgs masses (NUHM). We discuss the cosmological evolution of stop hadrons. Most {\tilde t_1}qq `sbaryons' and the corresponding `antisbaryons' annihilate with conventional antibaryons and baryons into {\tilde t_1}{\bar q} `mesinos' and the corresponding `antimesinos', respectively, shortly after the quark-hadron transition in the early Universe, and most mesinos and antimesinos subsequently annihilate. As a result, insufficient metastable charged stop hadrons survive to alter Big Bang nucleosynthesis.

Affiliated with

Also associated with

No associations

Rating

On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-493610