lunes, 25 de febrero de 2013

Can Standard Model Higgs Seed the Formation of Structures in Our Universe?

We study the Standard Model Higgs field as a source for the primordial curvature perturbation, particularly in the curvaton and modulated reheating scenario. We conclude that the Higgs cannot play as a curvaton due to the small energy density when it decays, however the modulated reheating by Higgs can be a viable scenario. In the latter case, the non-Gaussianity is inevitably generated and strongly constrains the type of potential of inflaton field and Higgs-dependent interaction term. For the quadratic potential of the inflaton field with decay rate which non-linearly depends on the Higgs vacuum expectation value, the contribution of Higgs field to the primordial curvature perturbation must be less than 8%.
Comments:12 pages; version accepted for publication in Phys.Rev.D
Subjects:High Energy Physics - Phenomenology (hep-ph); Cosmology and Extragalactic Astrophysics (astro-ph.CO); High Energy Physics - Theory (hep-th)
Cite as:arXiv:1209.2277 [hep-ph]
 (or arXiv:1209.2277v2 [hep-ph] for this version)

Submission history

From: Qing-Guo Huang [view email]
[v1] Tue, 11 Sep 2012 10:08:50 GMT (12kb)
[v2] Sat, 19 Jan 2013 01:17:46 GMT (13kb)



arXiv:1209.2277 [hep-ph]
 (or arXiv:1209.2277v2 [hep-ph] for this version)