A Soliton Solution with Baryon Number B=0 and Skyrmion

K. Fujii, S. Otsuki, F. Toyoda
1985 Progress of theoretical physics  
It is proved that, in so far as the Skyrmion exists, the Skyrme Lagrangian gives another soliton solution with the Hopf index H=l. The Hopf soliton is interpreted as a kind of composite of a Skyrmion and an anti-Skyrmion. Its mass and radius are given by those of the Skyrmion.
doi:10.1143/ptp.73.524 fatcat:jo5tp7vxrbgsnp5y23hzlizfny