The Dark Side of the Electroweak Phase Transition

Journal Article · Thu Oct 01 00:00:00 EDT 2009 · JHEP

DOI:https://doi.org/10.1007/JHEP11(2010)108· OSTI ID:3019610

Das, Subinoy ^[1]; Fox, Patrick J. ^[2]; Kumar, Abhishek ^[3]; Weiner, Neal ^[3]

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1. British Columbia U.
2. Fermilab
3. New York U., CCPP

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 O(GeV) 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.

• Research Organization: British Columbia U.; New York U., CCPP; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: US Department of Energy
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 3019610
• Report Number(s): FERMILAB-PUB-09-090-T; oai:inspirehep.net:833349; arXiv:0910.1262
• Journal Information: JHEP, Journal Name: JHEP Vol. 11
• Country of Publication: United States
• Language: English