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arXiv 1208.4432hep-phhep-th
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D项SUSY破缺时标量衰变为引力子

Scalar Decay into Gravitinos in the Presence of D-term SUSY Breaking

Motoi Endo, Koichi Hamaguchi, Takahiro Terada

摘要:

研究了在D项超对称性(SUSY)破缺条件下标量衰变为引力子的过程。由标量场的相干振荡衰减产生的引力子,如模量和暴胀子,会引起宇宙学问题。我们给出了标量部分衰变为两个引力子的一般公式。将其应用到一个具体的D项超对称性破缺模型中,发现D项超对称性破缺对引力子产生有抑制作用。

英文摘要:

Scalar decay into gravitinos is studied in the presence of D-term supersymmetry (SUSY) breaking. The gravitinos produced by the decay of coherent oscillations of scalar fields, such as moduli and inflatons, cause cosmological problems. We show the general formula for the partial decay rate of the scalar into two gravitinos. Applying it to a concrete model of D-term SUSY breaking, we find that D-term SUSY breaking can suppress gravitino production.

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