Electroweak vacuum stability and diphoton excess at 750 GeV
Zhang J(张珏); Zhou S(周顺); Zhang, J; Zhou, S
刊名CHINESE PHYSICS C
2016
卷号40期号:8
关键词vacuum stability diphoton excess singlet scalar
DOI10.1088/1674-1137/40/8/081001
通讯作者张珏 ; 周顺
文章类型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.
关键词[WOS]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
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260678
专题中国科学院高能物理研究所_理论物理室_期刊论文
作者单位中国科学院高能物理研究所
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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).
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