论文标题
从普朗克2018年极化数据中的宇宙双折射的新提取
New Extraction of the Cosmic Birefringence from the Planck 2018 Polarization Data
论文作者
论文摘要
我们在Planck 2018极化数据中搜索奇偶校验物理学的证据，并报告了对宇宙双折射角$β$的新测量。先前的测量受到普朗克检测器绝对极化角度的系统不确定性的限制。我们通过同时确定$β$的同时确定$ e $ - $ e $ - 和$ b $ - 模式的宇宙微波背景和银河前景发射的跨额度极化，从而完全减轻这种系统不确定性。我们表明，系统错误有效地减轻了，并达到了比以前的测量值小2 $ 2 $的不确定性，发现$β= 0.35 \ pm 0.14 \，°$ $（68％c.l.），不包括$β= 0 $ $β= 0 $ at $ 99.2 $ c.l.l.这对应于$2.4σ$的统计意义。
We search for evidence of parity-violating physics in the Planck 2018 polarization data, and report on a new measurement of the cosmic birefringence angle, $β$. The previous measurements are limited by the systematic uncertainty in the absolute polarization angles of the Planck detectors. We mitigate this systematic uncertainty completely by simultaneously determining $β$ and the angle miscalibration using the observed cross-correlation of the $E$- and $B$-mode polarization of the cosmic microwave background and the Galactic foreground emission. We show that the systematic errors are effectively mitigated and achieve a factor-of-$2$ smaller uncertainty than the previous measurement, finding $β=0.35 \pm 0.14\,°$ (68% C.L.), which excludes $β= 0$ at $99.2$% C.L. This corresponds to the statistical significance of $2.4σ$.
