Moduli decays and gravitinos

Moduli decays and gravitinos
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模量衰减和引力

DOI:
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发表时间:
2006
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通讯作者:
Y. Shirman
Y. Shirman
中科院分区:
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作者:
M. Dine;R. Kitano;A. Morisse;Y. Shirman

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弦宇宙学的模问题的一个提出的解决方案要求模相当重,它们的衰变将宇宙重新加热到高于核合成尺度的温度。在许多这类情形中,模近似是超对称的;那么,衰变到引力微子的过程受到螺旋度抑制是至关重要的。在本文中,我们讨论这些衰变受到抑制以及未受到抑制的情况。我们还对暴胀子衰变可能产生的引力微子问题进行了评论。
One proposed solution of the moduli problem of string cosmology requires that the moduli are quite heavy, their decays reheating the Universe to temperatures above the scale of nucleosynthesis. In many of these scenarios, the moduli are approximately supersymmetric; it is then crucial that the decays to gravitinos are helicity suppressed. In this paper, we discuss situations where these decays are, and are not, suppressed. We also comment on a possible gravitino problem from inflaton decay.