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题名: Systematic study of diphoton resonance at 750 GeV from sgoldstino
作者: Ding, R ;  Fan, YZ ;  Huang, L ;  Li, C ;  Li, TJ ;  Raza, S ;  Zhu, B
刊名: INTERNATIONAL JOURNAL OF MODERN PHYSICS A
出版日期: 2016
卷号: 31, 期号:26, 页码:1650151
关键词: Supersymmetric models ;  low scale supersymmetry breaking ;  diphoton resonance
学科分类: Physics
DOI: http://dx.doi.org/10.1142/S0217751X16501517
通讯作者: Raza, S (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: The ATLAS and CMS Collaborations of the Large Hadron Collider (LHC) have reported an excess of events in diphoton channel with invariant mass of about 750 GeV. With low energy supersymmetry breaking, we systematically consider the sgoldstino scalar S as the new resonance, which is a linear combination of the CP-even scalar s and CP-odd pseudoscalar a. Because we show that s and a can be degenerated or have large mass splitting, we consider two cases for all the following three scenarios: (1) Single resonance, s is the 750 GeV resonance decays to a pair of 1 GeV pseudoscalar a with suitable decay length, these two a decay into collimated pair of photons which cannot be distinguished at the LHC and may appear as diphotons instead of four photons. (2) Twin resonances, m(s) similar or equal to m(a) with a mass difference of about 40 GeV and both s and a decay into diphoton pairs. For productions, we consider three scenarios: (I) vector-boson fusion; (II) gluongluon fusion; (III) q (q) over bar pair production. In all these scenarios with two kinds of resonances, we find the parameter space that satisfies the diphoton production cross-section from 3 to 13 fb and all the other experimental constraints. And we address the decay width as well. In particular, in the third scenario, we observe that the production cross-section is small but the decay width of s or a can be from 40 to 60 GeV. Even if the 750 GeV diphoton excesses were not confirmed by the ATLAS and CMS experiments, we point out that our proposal can be used to explain the current and future diphoton excesses.
类目[WOS]: Physics, Nuclear ;  Physics, Particles & Fields
关键词[WOS]: MASSIVE SGOLDSTINOS ;  SUPERSYMMETRY ;  SIGNATURES ;  COLLIDERS ;  BREAKING ;  EXCESS
收录类别: SCI
项目资助者: Natural Science Foundation of China [11135003, 11275246, 11475238]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21530
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Ding, R,Fan, YZ,Huang, L,et al. Systematic study of diphoton resonance at 750 GeV from sgoldstino[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2016,31(26):1650151.
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