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In this paper we present a new method to extract cosmological parametersusing the radial scale of the Baryon Acoustic Oscillations as a standard rulerin deep galaxy surveys. The method consists in an empirical parametrization ofthe radial 2-point correlation function, which provides a robust and preciseextraction of the sound horizon scale. Moreover, it uses data from galaxysurveys in a manner that is fully cosmology independent and therefore,unbiased. A study of the main systematic errors and the validation of themethod in cosmological simulations are also presented, showing that themeasurement is limited only by cosmic variance. We then study the fullinformation contained in the Baryon Acoustic Oscillations, obtaining that thecombination of the radial and angular determinations of this scale is a verysensitive probe of cosmological parameters, able to set strong constraints onthe dark energy properties, even without combining it with any other probe.

Precise Measurement of the Radial Baryon Acoustic Oscillation Scales in Galaxy Redshift Surveys