Improving constraints on baryon acoustic oscillations with field-level inference
Abstract
We present results of field-level inference of the baryon acoustic oscillation (BAO) scale r s on rest-frame dark matter halo catalogs. Our field-level constraint on r s is obtained by explicitly sampling the initial conditions along with the bias and noise parameters via the LEFTfield EFT-based forward model. Comparing with a standard reconstruction pipeline applied to the same data and over the same scales, the field-level constraint on the BAO scale improves by a factor of ∼ 1.2 – 1.4 over standard BAO reconstruction. We point to a surprisingly simple source of additional information.
Fields of Study & Subjects
Reservoir Engineering and Simulation Methods
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Publisher
- American Physical Society (APS)
- Volume
- 113
- Issue
- 6
- Publication date
- 4 March 2026
- Language
- EN