The Peccei-Quinn field as curvaton
The Peccei-Quinn field as curvaton
复制标题
Peccei-Quinn 场作为 curvaton
DOI：
10.1088/1126-6708/2003/05/057
复制
发表时间：
2003
影响因子：
5.4
通讯作者：
R. R. Austri
中科院分区：
文献类型：
--
作者：
K. Dimopoulos;G. Lazarides;D. Lyth;R. R. Austri
考虑了最小超对称标准模型的一个简单推广，它通过Peccei-Quinn和连续的R对称性自然地同时求解强CP和μ问题。该模型补充了混合型通货膨胀和瘦肉症，但没有考虑这些情景的具体细节。结果表明，Peccei-Quinn场可以成功地作为一个曲率子来产生宇宙中的总曲率微扰，这与宇宙背景探测器的测量结果是一致的。帮助我们实现这一点的一个关键现象是，如果在随后的演化中，场恰好在势的最大值附近稳定了一段时间，那么场在膨胀过程中获得的微扰就会得到‘速速放大’。在这种情况下，场对总能量密度的贡献也增强了(‘速速效应’)，这也是有帮助的。在这个模型中，宇宙中的冷暗物质主要由轴子组成，这些轴子带有与总曲率微扰无关的等曲率微扰。也有最轻的粒子(中性子)，像重子一样，起源于膨胀的重新加热，因此获得了与曲率扰动完全相关的等温扰动。因此，总体等温扰动与绝热摄动具有混合相关性。结果表明，现有的宇宙微波背景辐射等温扰动界是满足的。同时，由于“速子效应”的作用，满足了从最近的Wilkinson微波各向异性探测数据中获得的曲率微扰的非高斯性的限制。
A simple extension of the minimal supersymmetric standard model which naturally and simultaneously solves the strong CP and μ problems via a Peccei-Quinn and a continuous R symmetry is considered. This model is supplemented with hybrid inflation and leptogenesis, but without taking the specific details of these scenarios. It is shown that the Peccei-Quinn field can successfully act as a curvaton generating the total curvature perturbation in the universe in accord with the cosmic background explorer measurements. A crucial phenomenon, which assists us to achieve this, is the `tachyonic amplification' of the perturbation acquired by this field during inflation if the field, in its subsequent evolution, happens to be stabilized for a while near a maximum of the potential. In this case, the contribution of the field to the total energy density is also enhanced (`tachyonic effect'), which helps too. The cold dark matter in the universe consists, in this model, mainly of axions which carry an isocurvature perturbation uncorrelated with the total curvature perturbation. There are also lightest sparticles (neutralinos) which, like the baryons, originate from the inflationary reheating and, thus, acquire an isocurvature perturbation fully correlated with the curvature perturbation. So, the overall isocurvature perturbation has a mixed correlation with the adiabatic one. It is shown that the presently available bound on such an isocurvature perturbation from cosmic microwave background radiation and other data is satisfied. Also, the constraint on the non-gaussianity of the curvature perturbation obtained from the recent Wilkinson microwave anisotropy probe data is fulfilled thanks to the `tachyonic effect'.
DOI：
10.1086/377220
发表时间：
2003-02
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
E. Komatsu;A. Kogut;M. Nolta;C. Bennett;M. Halpern;G. Hinshaw;N. Jarosik;M. Limon;S. Meyer;L. Page;D. Spergel;G. Tucker;L. Verde;Edward J. Wollack;E. L. W. Princeton;Nasa Gsfc;Ubc;U. Chicago;Brown;Ucla
通讯作者：
E. Komatsu;A. Kogut;M. Nolta;C. Bennett;M. Halpern;G. Hinshaw;N. Jarosik;M. Limon;S. Meyer;L. Page;D. Spergel;G. Tucker;L. Verde;Edward J. Wollack;E. L. W. Princeton;Nasa Gsfc;Ubc;U. Chicago;Brown;Ucla
影响因子：
8.7
作者：
Bennett, CL;Halpern, M;Weiland, JL
通讯作者：
Weiland, JL