Nucleon QCD sum rules in nuclear matter including radiative corrections

Abstract

We calculate the nucleon parameters in nuclear matter using the QCD sum rules method. The radiative corrections to only the leading operator product expansion terms are included, with the corrections of the order ${\ensuremath{\alpha}}_{s}$ beyond the logarithmic approximation taken into account. The density dependence of the influence of radiative corrections on the nucleon parameters is obtained. At saturation density, the radiative corrections increase the values of vector and scalar self-energies by about $40$ and $30$ MeV, respectively, which is much smaller than the result of a straightforward naive estimation. The results appear to be stable with respect to possible variations of the value of ${\ensuremath{\Lambda}}_{\mathrm{QCD}}$.