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题名: Interpretation of the Galactic Center excess and electroweak phase transition in the NMSSM
作者: Bi, XJ;  Bian, LG;  Huang, WC;  Shu, J;  Yin, PF
刊名: PHYSICAL REVIEW D
出版日期: 2015
卷号: 92, 期号:2, 页码:23507
学科分类: Astronomy & Astrophysics ;  Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.92.023507
通讯作者: Bian, LG (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 gamma-ray excess observed by the Fermi-LAT in the Galactic Center can be interpreted by the dark matter annihilation to b (b) over bar via a light pseudoscalar in the next-to-minimal supersymmetric standard model (NMSSM). It is interesting to note that the corresponding singlet scalar is useful to achieve a strongly first-order phase transition required by the electroweak baryogenesis. In this paper, we investigate the possibility that the NMSSM model can simultaneously accommodate these two issues. The phase transition strength can be characterized by the vacua energy gap at zero temperature and be sufficiently enhanced by the tree-level effect in the NMSSM. We find that the annihilation of singlino/Higgsino dark matter (DM) particles occurring close to the light pseudoscalar resonance is favored by the Galactic Center excess and the observed DM relic density, and some resulting regions in the parameter space with a small kappa/lambda. and a negative A. can simultaneously account for a successful strongly first-order electroweak phase transition.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: SUPERSYMMETRIC STANDARD MODEL ;  TAN BETA ;  BARYOGENESIS ;  ABUNDANCES ;  UNIVERSE ;  PROGRAM ;  SINGLET
收录类别: SCI
项目资助者: National Natural Science Foundation of China [11475189, 11475191, 11135009, 11175251] ;  973 Program of China [2013CB837000]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20931
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Bi, XJ,Bian, LG,Huang, WC,et al. Interpretation of the Galactic Center excess and electroweak phase transition in the NMSSM[J]. PHYSICAL REVIEW D,2015,92(2):23507.
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