Can we use Baryon Acoustic Oscillations distances?
Stefano Anselmi (Università di Padova)
Tuesday 16/01/2024 @ 14:00, Sala Antonio Sollima (IV piano Battiferro)
Baryon Acoustic Oscillations are considered one of the most powerful cosmological probes. They are assumed to provide distance measures independent of a specific cosmological model. At the same time the obtained distances are considered agnostic with respect to other cosmological observations. However, in current measurements, the inference is done assuming parameter values of a fiducial LCDM model and employing prescriptions tested to be unbiased only within some LCDM fiducial cosmologies. Moreover the procedure is plagued by the ambiguity of choosing a specific correlation function model-template to measure cosmological distances. Does this comply with the requirement of model and parameter independent distances useful, for instance, to characterize cosmological tensions? In this talk I will review the subject, answer compelling questions and explore new promising research directions.