Abstract
In a recent paper, the t-channel two-photon exchange contribution to the coefficients of nonrelativistic quantum electrodynamics (NRQED) four-fermion interaction were found. However while doing the matching two NRQED diagrams were lost. We have done these calculations for the case of different particle masses in the $\ensuremath{\Lambda}$-cutoff regularization scheme and present here the corrected result.
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