Echoes of the Electroweak Phase Transition: Discovering a Second Higgs Doublet through A0 → ZH0

被引：65

作者：

Dorsch, G. C. ^{[1
]}

Huber, S. J. ^{[1
]}

Mimasu, K. ^{[1
]}

No, J. M. ^{[1
]}

机构：

[1] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 21期

关键词：

FINITE-TEMPERATURE; QCD CORRECTIONS; BARYOGENESIS;

D O I：

10.1103/PhysRevLett.113.211802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The existence of a second Higgs doublet in nature could lead to a cosmological first-order electroweak phase transition and explain the origin of the matter-antimatter asymmetry in the Universe. We obtain the spectrum and properties of the new scalars H-0, A(0), and H-+/- that signal such a phase transition and show that the observation of the decay A(0) -> ZH(0) at LHC would be a "smoking gun" signature of these scenarios. We analyze the LHC search prospects for this decay in the llb (b) over bar and llW(+)W(-) final states, arguing that current data may be sensitive to this signature in the former channel as well as there being great potential for a discovery in either channel at the very early stages of the 14 TeV run.

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