Radiative corrections for the two-nucleon interaction in effective field theory

Radiative corrections are playing an increasingly significant role in low-energy nuclear physics. We investigate the influence of photons as explicit degrees of freedom within nuclear EFT on the deuteron binding energy, charge form factor, and the radiative capture process \( np \to d\gamma \) using the velocity renormalization group. In each case, evolving the subtraction velocity to a characteristic nucleon velocity in the bound state induces percent-level modifications in the relevant observables. These findings indicate that electromagnetic corrections represent a non-negligible source of uncertainty in current few-body calculations.