Inflationary magnetogenesis with added helicity: constraints from non-Gaussianities
Inflationary magnetogenesis with added helicity: constraints from non-Gaussianities
复制标题
具有附加螺旋性的膨胀磁生：非高斯性的约束
DOI：
10.1088/1361-6382/aac143
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发表时间：
2017
影响因子：
3.5
通讯作者：
L. Sorbo
中科院分区：
文献类型：
--
作者：
C. Caprini;M. C. Guzzetti;L. Sorbo
在先前的工作（Caprini和Sorbo 2014 J. Cosmol.阿斯特罗帕特JCAP 10（2014）056），我们中的两个人提出了一个基于滚动辅助场的暴胀磁生模型，该模型既能够解释由来自耀变体的伽马射线的（非）观测所推断的磁场，又能够启动银河发电机，而不会引起任何强耦合或强反反应机制。在这里，我们评估的标量谱和双谱相对于在该方案中产生的单场慢卷膨胀的校正。对模型的最强约束来自于标量双谱的非观测。然而，即使考虑到这些约束条件，该方案可以成功地解释所观察到的磁场，只要暴胀的能量尺度小于GeV，在某些条件下的辅助标量场的缓慢滚动。
In previous work (Caprini and Sorbo 2014 J. Cosmol. Astropart. Phys. JCAP10(2014)056), two of us have proposed a model of inflationary magnetogenesis based on a rolling auxiliary field able both to account for the magnetic fields inferred by the (non) observation of gamma-rays from blazars, and to start the galactic dynamo, without incurring in any strong coupling or strong backreaction regime. Here we evaluate the correction to the scalar spectrum and bispectrum with respect to single-field slow-roll inflation generated in that scenario. The strongest constraints on the model originate from the non-observation of a scalar bispectrum. Nevertheless, even when those constraints are taken into consideration, the scenario can successfully account for the observed magnetic fields as long as the energy scale of inflation is smaller than GeV, under some conditions on the slow roll of the auxiliary scalar field.
影响因子：
8.6
作者：
Ade, P. A. R.;Aikin, R. W.;Yoon, K. W.
通讯作者：
Yoon, K. W.