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Constraints on the birth of the universe and origin of cosmic dark flow

机译:对宇宙诞生和宇宙黑暗流动起源的制约

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摘要

We summarize three recent efforts to constrain the first few moments ofcosmic creation before and during the epoch of inflation. We consider two meansto explain a slight dip in the power spectrum of the cosmic microwavebackground for multipoles in the range of $\ell= 10-30$ from both the {\itPlanck} and {\it WMAP} data. We show that such a dip could be the result ofresonant creation of a massive particle that couples to the inflaton field. Forbest-fit models, the epoch of resonant particle creation reenters the horizonat wave numbers of $k_* \sim 0.00011 \pm 0.0004 $ ($h$ Mpc$^{-1}$). Theamplitude and location of these features correspond to the creation of a numberof degenerate fermion species of mass $\sim 15/\lambda^{3/2} $ $m_{pl}$ duringinflation where $\lambda$ is the coupling constant between the inflaton fieldand the created fermion species. Alternatively, one can explain the existenceof such a dip as due to a jump in the inflation generating potential. We showthat such a jump can also resolve the excessively large dark flow predictedfrom the M-theory landscape. Finally, we summarize our efforts to quantifyconstraints on the cosmic dark flow from a new analysis of the Type Iasupernova distance-redshift relation.
机译:我们总结了最近的三项努力,以约束通货膨胀时期之前和之中的宇宙创造的最初时刻。我们考虑两种方法来解释{\ itPlanck}和{\ it WMAP}数据得出的多极宇宙微波背景功率谱在$ \ ell = 10-30 $范围内的轻微下降。我们表明,这种倾角可能是共振产生的大颗粒与充气场耦合的结果。对于最合适的模型,共振粒子创建的时期重新输入水平波数$ k_ * \ sim 0.00011 \ pm 0.0004 $($ h $ Mpc $ ^ {-1} $)。这些特征的振幅和位置对应于在通货膨胀期间产生质量为$ \ sim 15 / \ lambda ^ {3/2} $ $ m_ {pl} $的许多简并的费米子物种,其中$ \ lambda $是两者之间的耦合常数。充气场和产生的费米子物种。或者,可以解释这种下降的存在,例如由于产生通货膨胀的潜力的跳跃。我们表明,这样的跳跃还可以解决根据M理论景观预测的过大暗流。最后,我们从对Iasupernova型距离-红移关系的新分析中总结了量化宇宙暗流约束的努力。

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