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arXiv 0902.2914hep-phastro-ph.GA
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南武-戈德斯通暗物质与Cosmic Ray电子和正电子过剩

Nambu-Goldstone Dark Matter and Cosmic Ray Electron and Positron Excess

Masahiro Ibe, Yu Nakayama, Hitoshi Murayama, Tsutomu T. Yanagida

摘要:

我们提出了一个暗物质模型,在规范调解的情况下,在动力学超对称性破缺扇区中识别为伪Nambu-Goldstone玻色子。暗物质粒子通过低于阈值的窄共振湮灭成一对R-轴子,每个R-轴子随后衰变成一对轻轻子。Breit-Wigner增强解释了最近的宇宙线实验PAMELA,ATIC和PPB-BETS中报道的过剩电子和正电子通量,而没有假设晕中的过密度,PAMELA的反质子通量的极限自然被回避。

英文摘要:

We propose a model of dark matter identified with a pseudo-Nambu-Goldstone boson in the dynamical supersymmetry breaking sector in a gauge mediation scenario. The dark matter particles annihilate via a below-threshold narrow resonance into a pair of R-axions each of which subsequently decays into a pair of light leptons. The Breit-Wigner enhancement explains the excess electron and positron fluxes reported in the recent cosmic ray experiments PAMELA, ATIC and PPB-BETS without postulating an overdensity in halo, and the limit on anti-proton flux from PAMELA is naturally evaded.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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