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题名: Exploration of decaying dark matter in a left-right symmetric model
作者: Guo, Wan-Lei ;  Wu, Yue-Liang ;  Zhou, Yu-Feng
刊名: PHYSICAL REVIEW D
出版日期: 2010
卷号: 81, 期号:7, 页码:-
关键词: COSMIC-RAY POSITRON ;  CP VIOLATION ;  II SEESAW ;  PARITY ;  PAMELA ;  PROPAGATION ;  ABUNDANCE ;  ENERGIES ;  FRACTION ;  SIGNALS
学科分类: Physics
通讯作者: Guo, WL , Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
部门归属: [Guo, WL; Wu, YL; Zhou, YF] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
英文摘要: SU(2)(L) triplet scalars appear in models motivated for the left-right symmetry, neutrino masses, and dark matter (DM), etc. If the triplets are the main decay products of the DM particle, and carry nonzero lepton numbers, they may decay dominantly into lepton pairs, which can naturally explain the current experimental results reported by PAMELA and Fermi-LAT or ATIC. We discuss this possibility in an extended left-right symmetric model in which the decay of the DM particle is induced by tiny soft charge-conjugation (C) violating interactions, and calculate the spectra for cosmic-ray positrons, neutrinos, and gamma rays. We show that the DM signals in the flux of high energy neutrinos can be significantly enhanced, as the triplets couple to both charged leptons and neutrinos with the same strength. In this scenario, the predicted neutrino-induced muon flux can be several times larger than the case in which the DM particle only directly decays into charged leptons. In addition, the charged components of the triplet may give an extra contribution to the high energy gamma rays through an internal bremsstrahlung process, which depends on the mass hierarchy between the DM particle and the triplet scalars.
资助者: National Basic Research Program of China[2010CB833000]; National Nature Science Foundation of China (NSFC)[10975170, 10821504, 10905084]; Chinese Academy of Science
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000277201900074
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5133
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Guo, Wan-Lei,Wu, Yue-Liang,Zhou, Yu-Feng. Exploration of decaying dark matter in a left-right symmetric model[J]. PHYSICAL REVIEW D,2010,81(7):-.
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