Extracting the BAO scale from BOSS DR12 dataset

TL;DR

This paper applies the Extractor method to BOSS DR12 data to measure the BAO scale, achieving improved accuracy for non-reconstructed data and comparable results for reconstructed data, with fewer nuisance parameters.

Contribution

The study demonstrates the effectiveness of the Extractor procedure on real BOSS data, reducing nuisance parameters and improving BAO scale measurement accuracy.

Findings

20% improvement in accuracy for non-reconstructed data

Comparable accuracy for reconstructed data with BOSS analysis

Fewer nuisance parameters needed for the Extractor method

Abstract

We present the first application to real data from the BOSS DR12 dataset of the Extractor procedure to determine the acoustic scale imprinted on Baryonic Acoustic Oscillations (BAO). We show that, being largely insensitive to the broadband shape of the Power Spectrum, this procedure requires a lower number of nuisance parameters than those used by the BOSS collaboration, For non-reconstructed data our analysis improves the accuracy on the acoustic scale by about 20 %, while for reconstructed ones we get essentially the same level of accuracy as the BOSS analysis.