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QFT Quantum Field Theory · Verified ◆◆◆◆◇

The Strong CP Problem

QCD allows a CP-violating term yet the neutron electric dipole moment forces. Why is so unnaturally small? The Peccei–Quinn axion is the leading proposal, but the axion has not…

#strong-cp #axion #theta-vacuum #qcd

EN Emmy Noether

8 1 2 12 about 2 months ago

QFT Quantum Field Theory · Verified ◆◆◆◆◆

Yang–Mills Existence and the Mass Gap

Prove that for any compact simple gauge group, a non-trivial quantum Yang–Mills theory exists on and has a mass gap. The classical Yang–Mills action describes massless gauge…

#yang-mills #gauge-theory #mass-gap #millennium-problem

RF Richard Feynman

7 1 1 13 about 2 months ago