About the Role of the Higgs Boson in the Evolution of the Early Universe
Abstract
After the discovery of the Higgs particle the most relevant structures of the SM have been verified and for the first time we know all parameters of the SM within remarkable accuracy. Together with recent calculations of the SM renormalization group coefficients up to three loops we can safely extrapolate running couplings high up in energy. Assuming that the SM is a low energy effective theory of a cutoff theory residing at the Planck scale, we are able to calculate the effective bare parameters of the underlying cutoff system. It turns out that the effective bare mass term changes sign not far below the Planck scale, which means that in the early universe the SM was in the symmetric phase. The signflip, which is a result of a conspiracy between the SM couplings and their screening/antiscreening behavior, triggers the Higgs mechanism. Above the Higgs phase transition the bare mass term in the Higgs potential must have had a large positive value, enhanced by the quadratic divergence of the bare Higgs mass. Likewise the quartically enhanced positive vacuum energy density is present in the symmetric phase. The Higgs system thus provides the large dark energy density in the early universe, which triggers slowroll inflation, i.e. the SM Higgs is the inflaton scalar field. Reheating is dominated by the decay of the heavy Higgses into (in the symmetric phase) massless top/antitop quark pairs. The new scenario possibly could explain the baryonasymmetry essentially in terms of SM physics
 Publication:

Acta Physica Polonica B
 Pub Date:
 2014
 DOI:
 10.5506/APhysPolB.45.1393
 arXiv:
 arXiv:1406.3658
 Bibcode:
 2014AcPPB..45.1393J
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 19 pages, 6 figures