The Dark Energy Spectroscopic Instrument First Year Results: Cosmological Parameters from the Baryon Acoustic Oscillations*

The Dark Energy Spectroscopic Instrument (DESI) collaboration is conducting a five year redshift survey of 40 million extra-galactic sources over 14,000 square degrees of the northern sky. Its primary goals are to measure the cosmic expansion history with Baryon Acoustic Oscillations (BAO) and the growth rate of structure with Redshift Space Distortions (RSD) . We will present for the first time cosmology results from DESI year-1 data for the expansion history derived from precise measurements of the Baryon Acoustic Oscillations (BAO). The results particularly include new stringent constraints on the dark energy equation of state, the Hubble parameter, spatial curvature, and neutrino mass from DESI data with and without various other available cosmological data sets. The cosmological implications of the results will be briefly discussed.