Invisible Higgs boson decay in the littlest Higgs model with T-parity

被引：30

作者：

Hundi, Raghavendra Srikanth ^{[1
]}

Mukhopadhyaya, Biswarup ^{[1
]}

Nyffeler, Andreas ^{[1
]}

机构：

[1] Harish Chandra Res Inst, Allahabad 211019, Uttar Pradesh, India

来源：

PHYSICS LETTERS B | 2007年 / 649卷 / 04期

关键词：

D O I：

10.1016/j.physletb.2007.04.027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the invisible decay of the Higgs boson into a pair of stable, heavy photons, H -> A(H) A(H), in the littlest Higgs model with T-parity. For a symmetry breaking scale of f = 450 GeV, the branching ratio H -> A(H) A(H) can be as high as 93% for Higgs masses below 150 GeV. For f = 500 GeV, the invisible branching ratio is about 75% in the Higgs mass range 135-150 GeV and 10 (5.5)% for m(H) = 200 (600) GeV. It drops to a few percent for f larger than 600 GeV. We have found regions in parameter space, allowed by the electroweak precision data, with such low values of f for 115 GeV < m(H) < 650 GeV. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：280 / 286

页数：7

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