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题名: Higgs naturalness and dark matter stability by scale invariance
作者: Guo, J;  Kang, ZF
刊名: NUCLEAR PHYSICS B
出版日期: 2015
卷号: 898, 期号:0, 页码:415-430
学科分类: Physics
DOI: http://dx.doi.org/10.1016/j.nuclphysb.2015.07.014
通讯作者: Kang, ZF (reprint author), Korea Inst Adv Study, Sch Phys, Seoul 130722, South Korea.
文章类型: Article
英文摘要: Extending the spacetime symmetries of standard model (SM) by scale invariance (SI) may address the Higgs naturalness problem. In this article we attempt to embed accidental dark matter (DM) into SISM, requiring that the symmetry protecting DM stability is accidental due to the model structure rather than imposed by hand. In this framework, if the light SM-like Higgs boson is the pseudo Goldstone boson of SI spontaneously breaking, we can even pine down the model, two-Higgs-doublets plus a real singlet: The singlet is the DM candidate and the extra Higgs doublet triggers electroweak symmetry breaking via the Coleman-Weinberg mechanism; Moreover, it dominates DM dynamics. We study spontaneously breaking of SI using the Gillard-Weinberg approach and find that the second doublet should acquire vacuum expectation value near the weak scale. Moreover, its components should acquire masses around 380 GeV except for a light CP-odd Higgs boson. Based on these features, we explore viable ways to achieve the correct relic density of DM, facing stringent constraints from direct detections of DM. For instance, DM annihilates into b (b) over bar near the SM-like Higgs boson pole, or into a pair of CP-odd Higgs boson with mass above that pole. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.
类目[WOS]: Physics, Particles & Fields
关键词[WOS]: ELECTROWEAK SYMMETRY-BREAKING ;  STANDARD MODEL ;  SECTOR ;  BOSON
收录类别: SCI
项目资助者: China Postdoctoral Science Foundation [2012M521136]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20886
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Recommended Citation:
Guo, J,Kang, ZF. Higgs naturalness and dark matter stability by scale invariance[J]. NUCLEAR PHYSICS B,2015,898(0):415-430.
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