Saving the Axions in Superstring Models
Saving the Axions in Superstring Models
复制标题
在超弦模型中保存轴子
DOI：
10.1016/0370-2693(85)90763-4
复制
发表时间：
1985
影响因子：
4.4
通讯作者：
Katsuji Yamamoto
中科院分区：
文献类型：
--
作者：
Katsuji Yamamoto
在由超弦理论推导而来的有效四维超对称理论中，我们研究了一种规避轴子衰变常数ƒa > 1012GeV的宇宙学边界的可能方法。大量的熵可以由希格斯场的非平衡衰变产生，这是导致中质量尺度MI的额外规范对称断裂的原因。这种希格斯场的出现是超弦模型的一个一般特征。我们发现，如果引力子质量m3 2 ~ 1−102GeV和MI ~ 107−1010GeV，轴子被熵产生有效地稀释，ƒa ~ O （1016GeV）仍然是可以接受的。
In the effective four-dimensional supersymmetric theories derived from the superstring theories, we investigate a possible way to evade the cosmological bound ƒa≲1012GeV on the axion decay constant. A significant amount of entropy could be produced by the out-of-equilibrium decay of the Higgs field which is responsible for the breaking of the extra gauge symmetry at an intermediate mass scale MI. The appearance of such a Higgs fiield is a general feature of the superstring models. We find that if the gravitino mass m3 2∼1−102GeV and MI∼107−1010GeV, the axions are diluted efficiently by the entropy production, and ƒa∼ O (1016GeV ) will still be acceptable.