Complex sentence: The underlying mechanism behind the magnetic catalysis is the dimensional reduction of the low-energy charged spin-1/2 particles and, as a result of such reduction, a strong enhancement of the particle-antiparticle pairing responsible for symmetry breaking.
Split into simpler sentences: The underlying mechanism behind magnetic catalysis is the dimensional reduction of low-energy charged spin-1/2 particles. As a result of such reduction, there exists a strong enhancement of the particle-antiparticle pairing responsible for symmetry breaking.