Electroweak vacuum stability and diphoton excess at 750 GeV
文献类型：期刊论文
| 作者 | Zhang J(张珏); Zhou S(周顺); Zhang, J; Zhou, S |
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2016 |
| 卷号 | 40期号:8 |
| 关键词 | vacuum stability diphoton excess singlet scalar |
| DOI | 10.1088/1674-1137/40/8/081001 |
| 通讯作者 | 张珏 ; 周顺 |
| 文献子类 | Article |
| 英文摘要 | Recently, both ATLAS and CMS collaborations at the CERN Large Hadron Collider (LHC) announced their observations of an excess of diphoton events around the invariant mass of 750 GeV with a local significance of 3.6 sigma and 2.6 sigma, respectively. In this paper, we interpret the diphoton excess as the on-shell production of a real singlet scalar in the pp -> S -> gamma gamma channel. To accommodate the observed production rate, we further introduce a vector-like fermion F, which carries both color and electric charges. The viable regions of model parameters are explored for this simple extension of the Standard Model (SM). Moreover, we revisit the problem of electroweak vacuum stability in the same scenario, and find that the requirement for the electroweak vacuum stability up to high energy scales imposes serious constraints on the Yukawa coupling of the vector-like fermion and the quartic couplings of the SM Higgs boson and the new singlet scalar. Consequently, a successful explanation for the diphoton excess and the absolute stability of electroweak vacuum cannot be achieved simultaneously in this economical setup. |
| WOS关键词 | RENORMALIZATION-GROUP EQUATIONS ; QUANTUM-FIELD THEORY ; HIGGS-BOSON MASSES ; STANDARD-MODEL ; BROKEN SYMMETRIES ; ATLAS DETECTOR ; ROOT-S=7 TEV ; TOP-QUARK ; LHC ; SUPERSYMMETRY |
| 语种 | 英语 |
| WOS记录号 | WOS:000381731100001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/260678]  |
| 专题 | 高能物理研究所_理论物理室 |
| 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 | Zhang J,Zhou S,Zhang, J,et al. Electroweak vacuum stability and diphoton excess at 750 GeV[J]. CHINESE PHYSICS C,2016,40(8). |
| APA | 张珏,周顺,Zhang, J,&Zhou, S.(2016).Electroweak vacuum stability and diphoton excess at 750 GeV.CHINESE PHYSICS C,40(8). |
| MLA | 张珏,et al."Electroweak vacuum stability and diphoton excess at 750 GeV".CHINESE PHYSICS C 40.8(2016). |
入库方式： OAI收割
来源：高能物理研究所
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