Disconnected covariance of 2-point functions in large-scale structure
Disconnected covariance of 2-point functions in large-scale structure
Optimal analyses using the 2-point functions of large-scale structure probes require accurate covariance matrices. A covariance matrix of the 2-point function comprises the disconnected part and the connected part. While the connected covariance only becomes important on small scales, the disconnected covariance is dominant on large scales, where the survey …