Relativistic collective coordinate system of solitons and spinning Skyrmion

We calculate the leading relativistic correction to the rigid body approximation used by Adkins and Nappi (and Witten) for the collective coordinate quantization of a Skyrmion with baryon number one. We derive a field theory solution of a spinning Skyrmion, expanding the field configuration in powers of the angular velocity, and then obtain the relativistic corrections to the decay constant and various static properties of nucleons. which amount to 5% – 20%.