Symmetry breaking indication for supergravity inflation in light of the Planck 2015
Symmetry breaking indication for supergravity inflation in light of the Planck 2015
复制标题
根据普朗克 2015 的超重力膨胀对称破缺指示
DOI：
10.1088/1475-7516/2015/09/006
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发表时间：
2015-02
影响因子：
6.4
通讯作者：
Nanopoulos, Dimitri V.
中科院分区：
文献类型：
--
作者：
Li, Tianjun;Li, Zhijin;Nanopoulos, Dimitri V.
具有精确整体U(1)对称性或Kähler势平移对称性的超引力(Sugra)理论为暴涨提供了自然的框架。然而，普朗克合作的原始张量涨落的新结果并不支持二次膨胀。为了与新的普朗克数据一致，我们指出需要显式对称破缺，并对这两个Sugra暴涨进行了详细的研究。对于具有整体U(1)对称性的Sugra暴涨，对称性破缺项导致了暴胀势的三角调制。U(1)对称破缺项的系数约为10−2，其高阶修正可以忽略不计。这些模型预测了相当大的张量波动，并与普朗克的结果高度一致。特别是，具有线性U(1)对称破缺项的模型预测了张量标量比在r∼0.01和运行光谱指数αS∼−0.004附近，这与普朗克的观测结果很好地吻合。对于具有破缺移位对称性的Sugra暴涨，暴胀势受指数因子的调制。调制的线性和二次型模型与普朗克的观测结果一致。在这两种类型的模型中，张量与标量之比可以达到10−2量级，这将在不久的将来的观测中得到验证。
Supergravity (SUGRA) theories with exact global U (1) symmetry or shift symmetry in Kähler potential provide natural frameworks for inflation. However, quadratic inflation is disfavoured by the new results on primordial tensor fluctuations from the Planck Collaboration. To be consistent with the new Planck data, we point out that the explicit symmetry breaking is needed, and study these two SUGRA inflation in detail. For SUGRA inflation with global U (1) symmetry, the symmetry breaking term leads to a trigonometric modulation on inflaton potential. Coefficient of the U (1) symmetry breaking term is of order 10− 2, which is sufficient large to improve the inflationary predictions while its higher order corrections are negligible. Such models predict sizeable tensor fluctuations and highly agree with the Planck results. In particular, the model with a linear U (1) symmetry breaking term predicts the tensor-to-scalar ratio around r∼ 0.01 and running spectral index α s∼− 0.004, which comfortably fit with the Planck observations. For SUGRA inflation with breaking shift symmetry, the inflaton potential is modulated by an exponential factor. The modulated linear and quadratic models are consistent with the Planck observations. In both types of models the tensor-to-scalar ratio can be of order 10− 2, which will be tested by the near future observations.
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影响因子：
5
作者：
G. Barenboim;Wan-il Park
通讯作者：
G. Barenboim;Wan-il Park
影响因子：
8.6
作者：
M. Kawasaki;Masahide Yamaguchi;T. Yanagida
通讯作者：
M. Kawasaki;Masahide Yamaguchi;T. Yanagida
DOI：
10.1016/0370-1573(87)90034-2
发表时间：
1987
期刊：
Physics Reports
影响因子：
--
作者：
A. Lahanas;D. Nanopoulos
通讯作者：
A. Lahanas;D. Nanopoulos
影响因子：
4.4
作者：
K. Harigaya;M. Ibe
通讯作者：
K. Harigaya;M. Ibe
影响因子：
5
作者：
Q. Minor;M. Kaplinghat
通讯作者：
Q. Minor;M. Kaplinghat