论文标题
在宇宙微波背景中缺少大角度相关性与偶数点位不平衡
Missing large-angle correlations versus even-odd point-parity imbalance in the cosmic microwave background
论文作者
论文摘要
语境。在宇宙微波背景(CMB)辐射的两点角度相关性中,存在最大相关角($θ_{max} \ gtrsim 60^{\ circ} $),通过WMAP和PLANCK测量,与标准的通货膨胀率相比,该辐射均与标准的通气体式相比,这是跨越的(i. $ 180^{\ circ} $)。然而,在原始功率谱中引入了硬的下截面($ k_ {min} $),但是,自然而然地导致存在$θ_{max} $。在这些数据中检测到的其他宇宙学异常中,在CMB的角度功率谱中已经看到了奇怪的奇偶校验多物的明显优势。但是,此功能可能仅仅是由于天空某些地区的观察性污染。 目标。因此,在尝试提供更详细的评估,即这种奇怪的不对称性是否对CMB是固有的,因此我们在本文中进行,首先,首先要检查这种奇怪的均等不平衡是否也表现在角度相关功能中,其次,其次要详细检查$θ_的存在与$θ_的存在与最大的互动之间的相互作用。 方法。我们采用了几个奇偶校验统计数据,并重新计算了截止$ k_ {min} $不同值的角相关函数,以优化对不同的Planck 2018数据的拟合。 结果。我们发现数据中这些特征之间的现象学联系,得出结论,必须将两者一起考虑以优化与Planck 2018数据的理论拟合。 结论。这种结果与CMB的奇偶校验不平衡是否固有,但是如果是奇怪的,那么即使是奇怪的不对称性会显然表明新物理学的出现。
Context. The existence of a maximum correlation angle ($θ_{max} \gtrsim 60^{\circ}$) in the two-point angular temperature correlations of cosmic microwave background (CMB) radiation, measured by WMAP and Planck, stands in sharp contrast to the prediction of standard inflationary cosmology, in which the correlations should extend across the full sky (i.e., $180^{\circ}$). The introduction of a hard lower cutoff ($k_{min}$) in the primordial power spectrum, however, leads naturally to the existence of $θ_{max}$. Among other cosmological anomalies detected in these data, an apparent dominance of odd-over-even parity multipoles has been seen in the angular power spectrum of the CMB. This feature, however, may simply be due to observational contamination in certain regions of the sky. Aims. In attempting to provide a more detailed assessment of whether this odd-over-even asymmetry is intrinsic to the CMB, we therefore proceed in this paper, first, to examine whether this odd-even parity imbalance also manifests itself in the angular correlation function and, second, to examine in detail the interplay between the presence of $θ_{max}$ and this observed anomaly. Methods. We employed several parity statistics and recalculated the angular correlation function for different values of the cutoff $k_{min}$ in order to optimize the fit to the different Planck 2018 data. Results. We find a phenomenological connection between these features in the data, concluding that both must be considered together in order to optimize the theoretical fit to the Planck 2018 data. Conclusions. This outcome is independent of whether the parity imbalance is intrinsic to the CMB, but if it is, the odd-over-even asymmetry would clearly point to the emergence of new physics.