Electroweak baryogenesis in non-minimal composite Higgs models

被引：119

作者：

Espinosa, Jose R. ^{[1
,2
]}

Gripaios, Ben ^{[3
]}

Konstandin, Thomas ^{[4
]}

Riva, Francesco ^{[2
,5
]}

机构：

[1] ICREA, Barcelona, Spain

[2] Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain

[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[4] CERN PH TH, CH-1211 Geneva 23, Switzerland

[5] Univ Padua, Ist Galileo Galilei, I-35131 Padua, Italy

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2012年 / 01期

关键词：

baryon asymmetry; particle physics - cosmology connection; cosmological phase transitions; cosmology of theories beyond the SM; BARYON-NUMBER NONCONSERVATION; SPONTANEOUS CP VIOLATION; ELECTRIC-DIPOLE MOMENT; PHASE-TRANSITION; COSMOLOGICAL EXPERIMENTS; DIMENSIONAL REDUCTION; DOMAIN-WALLS; MSSM; MATTER; DYNAMICS;

D O I：

10.1088/1475-7516/2012/01/012

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We address electroweak baryogenesis in the context of composite Higgs models, pointing out that modifications to the Higgs and top quark sectors can play an important role in generating the baryon asymmetry. Our main observation is that composite Higgs models that include a light, gauge singlet scalar in the spectrum [as in the model based on the symmetry breaking pattern SO(6) -> SO(5)], provide all necessary ingredients for viable baryogenesis. In particular, the singlet leads to a strongly first-order electroweak phase transition and introduces new sources of CP violation in dimension-five operators involving the top quark. We discuss the amount of baryon asymmetry produced and the experimental constraints on the model.

引用

页数：26

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