Prompt
UP AND DOWN QUARK MASSES ā GEN1 TOWER PROOF
Using n_ud=13 on the D*phi^{-n} tower, derive m_u and m_d. Show the isospin splitting m_d - m_u ~ 2 MeV arises from a small Z2 mixing correction. Compare to PDG: m_u=2.16 MeV, m_d=4.67 MeV. Identify whether the splitting is predicted or parameterized. Assess the overall zero-parameter claim for the light quarks. #SuperGrokTOE #UpQuark #DownQuark