Simplest little Higgs model revisited: Hidden mass relation, unitarity, and naturalness
文献类型：期刊论文
| 作者 | Mao, YN; Zhou, Y; Cheung, K; He, SP; Mao YN(毛英男); Zhang, C |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2018 |
| 卷号 | 97期号:11页码:115001 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/PhysRevD.97.115001 |
| 文献子类 | Article |
| 英文摘要 | We analyze the scalar potential of the simplest little Higgs (SLH) model in an approach consistent with the spirit of continuum effective field theory (CEFT). By requiring correct electroweak symmetry breaking (EWSB) with the 125 GeV Higgs boson, we are able to derive a relation between the pseudoaxion mass m. and the heavy top mass m(T), which serves as a crucial test of the SLH mechanism. By requiring m(eta)(2) > 0 an upper bound on mT can be obtained for any fixed SLH global symmetry breaking scale f. We also point out that an absolute upper bound on f can be obtained by imposing partial wave unitarity constraint, which in turn leads to absolute upper bounds of m(T)less than or similar to 19 TeV, m(eta) less than or similar to 1.5 TeV, and m(Z)' less than or similar to 48 TeV. We present the allowed region in the three-dimensional parameter space characterized by f, t(beta); m(T), taking into account the requirement of valid EWSB and the constraint from perturbative unitarity. We also propose a strategy of analyzing the fine-tuning problem consistent with the spirit of CEFT and apply it to the SLH. We suggest that the scalar potential and fine-tuning analysis strategies adopted here should also be applicable to a wide class of little Higgs and twin Higgs models, which may reveal interesting relations as crucial tests of the related EWSB mechanism and provide a new perspective on assessing their degree of fine-tuning. |
| 电子版国际标准刊号 | 2470-0029 |
| WOS关键词 | SYMMETRY-BREAKING ; PARTICLE ; BOSON ; LHC |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000434017700002 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285972]  |
| 专题 | 高能物理研究所_理论物理室 |
| 通讯作者 | Mao YN(毛英男) |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Mao, YN,Zhou, Y,Cheung, K,et al. Simplest little Higgs model revisited: Hidden mass relation, unitarity, and naturalness[J]. PHYSICAL REVIEW D,2018,97(11):115001. |
| APA | Mao, YN,Zhou, Y,Cheung, K,He, SP,毛英男,&Zhang, C.(2018).Simplest little Higgs model revisited: Hidden mass relation, unitarity, and naturalness.PHYSICAL REVIEW D,97(11),115001. |
| MLA | Mao, YN,et al."Simplest little Higgs model revisited: Hidden mass relation, unitarity, and naturalness".PHYSICAL REVIEW D 97.11(2018):115001. |
入库方式： OAI收割
来源：高能物理研究所
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