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arXiv 0906.4160hep-th
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标量-介子理论中的振荡

Oscillons in dilaton-scalar theories

Gyula Fodor, Péter Forgács, Zalán Horváth, Márk Mezei

摘要:

分析方法和数值模拟表明,极长寿命的球对称介子出现在几乎任何真正的标量场理论耦合到一个无质量的介子(DS理论)。事实上,这种“电子”介子已经存在于最简单的非平凡DS理论中--一个与介子耦合的自由质量标量场。它表明,在类比与一个单一的非线性标量场的情况下,在DS理论也有时间周期准呼吸(QB)与小振幅的标量子。利用QB图象,解析地确定了小振幅声子的辐射规律。

英文摘要:

It is shown by both analytical methods and numerical simulations that extremely long living spherically symmetric oscillons appear in virtually any real scalar field theory coupled to a massless dilaton (DS theories). In fact such "dilatonic" oscillons are already present in the simplest non-trivial DS theory -- a free massive scalar field coupled to the dilaton. It is shown that in analogy to the previously considered cases with a single nonlinear scalar field, in DS theories there are also time periodic quasibreathers (QB) associated to small amplitude oscillons. Exploiting the QB picture the radiation law of the small amplitude dilatonic oscillons is determined analytically.

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