BMSSM implications for cosmology

作者：Bernal Nicolas^*; Blum Kfir; Nir Yosef; Losada Marta

来源：The Journal of High Energy Physics, 2009, 2009(8): 053.

DOI：10.1088/1126-6708/2009/08/053

• Supersymmetry Phenomenology

The addition of non-renormalizable terms involving the Higgs fields to the MSSM (BMSSM) ameliorates the little hierarchy problem of the MSSM. We analyze in detail the two main cosmological issues affected by the BMSSM: dark matter and baryogenesis. The regions for which the relic abundance of the LSP is consistent with WMAP and collider constraints are identified, showing that the bulk region and other previously excluded regions are now permitted. Requiring vacuum stability limits the allowed regions. Based on a two-loop finite temperature effective potential analysis, we show that the electroweak phase transition can be sufficiently first order in regions that for the MSSM are incompatible with the LEP Higgs mass bound, including parameter values of tan beta less than or similar to 5, m((t) over tilde1) > m(t), m(Q) << TeV.

• 出版日期2009-8