On the Refinement of the Theory of Primary Recombination and the Problem of the Hubble Tension

The values of the Hubble constant obtained from the data on the early and late Universe differ by 10%, which is about five standard deviations. The DESY collaboration data can help solve this problem. These data are very consistent with the previously obtained refinement of the standard recombination theory, and the value of the Hubble constant H 0 = 73.5 km/s/Mpc from measurements in the late Universe.