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arXiv 1203.0230hep-phastro-ph.COhep-th
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违反统计各向异性的宇称

Parity Violating Statistical Anisotropy

Konstantinos Dimopoulos, Mindaugas Karciauskas

摘要:

研究了轴向耦合阿贝尔矢量玻色子场的粒子产生。得到了矢量场横向分量尺度不变谱产生的条件。如果矢量场对宇宙中的曲率扰动有贡献,尺度不变的粒子产生使它能够在宇宙学扰动的谱和双谱中产生统计各向异性。轴向耦合允许粒子产生违反宇称,这反过来又可以在双谱中产生违反宇称的签名。导出了宇称违反的条件,并在矢量曲率范例的背景下获得了观测签名。基于真实粒子理论给出了两个具体的例子。

英文摘要:

Particle production of an Abelian vector boson field with an axial coupling is investigated. The conditions for the generation of scale invariant spectra for the vector field transverse components are obtained. If the vector field contributes to the curvature perturbation in the Universe, scale-invariant particle production enables it to give rise to statistical anisotropy in the spectrum and bispectrum of cosmological perturbations. The axial coupling allows particle production to be parity violating, which in turn can generate parity violating signatures in the bispectrum. The conditions for parity violation are derived and the observational signatures are obtained in the context of the vector curvaton paradigm. Two concrete examples are presented based on realistic particle theory.

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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