In Theory of strong interactions, what controls the physics of light mesons?
Spontaneous chiral symmetry breaking
Gauge symmetry breaking
Higgs field
Pion field
Answer
Spontaneous chiral symmetry breaking is a phenomenon in Theory of strong interactions that controls the physics of light mesons. The chiral symmetry is a symmetry between particles and antiparticles. However, in the real world, the masses of the up and down quarks are not equal, and this breaks the chiral symmetry.
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