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Journal of High Energy Physics

, 2010:108

First Online: 23 November 2010Received: 25 May 2010Revised: 24 October 2010Accepted: 04 November 2010


Recent data from cosmic ray experiments may be explained by a new GeV scale of physics. In addition the fine-tuning of supersymmetric models may be alleviated by new \ \mathcal{O}\left {\text{GeV}} ight \ states into which the Higgs boson could decay. The presence of these new, light states can affect early universe cosmology. We explore the consequences of a light ∼GeV scalar on the electroweak phase transition. We find that trilinear interactions between the light state and the Higgs can allow a first order electroweak phase transition and a Higgs mass consistent with experimental bounds, which may allow electroweak baryogenesis to explain the cosmological baryon asymmetry. We show, within the context of a specific supersymmetric model, how the physics responsible for the first order phase transition may also be responsible for the recent cosmic ray excesses of PAMELA, FERMI etc. We consider the production of gravity waves from this transition and the possible detectability at LISA and BBO.

KeywordsHiggs Physics Cosmology of Theories beyond the SM ArXiv ePrint: 0910.1262

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Autor: Subinoy Das - Patrick J. Fox - Abhishek Kumar - Neal Weiner


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