Strong Planck constraints on braneworld and non-commutative inflation
Strong Planck constraints on braneworld and non-commutative inflation
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DOI：
10.1088/1475-7516/2014/03/052
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发表时间：
2013-10
影响因子：
6.4
通讯作者：
G. Calcagni;S. Kuroyanagi;Junko Ohashi;S. Tsujikawa
中科院分区：
文献类型：
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作者：
G. Calcagni;S. Kuroyanagi;Junko Ohashi;S. Tsujikawa
我们使用普朗克、WMAP极化和BAO数据，对膜世界和非对易暴胀的一些暴胀势进行了观测似然约束。这里考虑的膜世界和非交换场景都受到最新数据的限制，甚至比标准广义相对论模型更严重。在95%以上的置信水平下，对于randal - sundrum （RS）膜世界宇宙学中的p小于等于2，以及对于p小于等于0，由于标量光谱指数大，也在高斯-博内（GB）膜世界的高曲率极限和非交换膨胀的红外极限中，排除了单项电位V（ϕ）∝ϕp。自然暴胀、小变化暴胀模型和斯塔宾斯基暴胀的一些参数值在所有情况下都是允许的，尽管对于非交换时空中的自然暴胀需要进行一些调整。
We place observational likelihood constraints on braneworld and non-commutative inflation for a number of inflaton potentials, using Planck, WMAP polarization and BAO data. Both braneworld and non-commutative scenarios of the kind considered here are limited by the most recent data even more severely than standard general-relativity models. At more than 95 % confidence level, the monomial potential V(ϕ)∝ϕp is ruled out for p ⩾ 2 in the Randall-Sundrum (RS) braneworld cosmology and, for p > 0, also in the high-curvature limit of the Gauss-Bonnet (GB) braneworld and in the infrared limit of non-commutative inflation, due to a large scalar spectral index. Some parameter values for natural inflation, small-varying inflaton models and Starobinsky inflation are allowed in all scenarios, although some tuning is required for natural inflation in a non-commutative spacetime.