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arXiv 0706.0986hep-phastro-phhep-th
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超重力中的膨胀子衰变

Inflaton Decay in Supergravity

Motoi Endo, Fuminobu Takahashi, T. T. Yanagida

摘要:

我们讨论了超引力中暴胀子的衰变,考虑到引力效应。它表明,如果暴胀子有一个非零的真空期望值,它一般耦合到任何物质场,出现在超势在树的水平,并通过异常的超引力的任何规范部门。通过这些过程,暴胀子一般会衰变到超对称破缺扇区,产生许多引力子。暴胀子也直接衰变成一对引力子。我们得到的限制,以避免过度生产的引力子的通货膨胀模型和超对称性破缺的情况。此外,暴胀子通过顶部Yukawa耦合和SU(3)C规范相互作用自然衰减到可见扇区。

英文摘要:

We discuss inflaton decay in supergravity, taking account of the gravitational effects. It is shown that, if the inflaton has a nonzero vacuum expectation value, it generically couples to any matter fields that appear in the superpotential at the tree level, and to any gauge sectors through anomalies in the supergravity. Through these processes, the inflaton generically decays into the supersymmetry breaking sector, producing many gravitinos. The inflaton also directly decays into a pair of the gravitinos. We derive constraints on both inflation models and supersymmetry breaking scenarios for avoiding overproduction of the gravitinos. Furthermore, the inflaton naturally decays into the visible sector via the top Yukawa coupling and SU(3)_C gauge interactions.

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