Explaining Why the u and d Quark Masses are Similar
arXiv:hep-ph/0305090 · doi:10.1016/S0370-2693(03)00772-X
Abstract
An approach is suggested for modeling quark and lepton masses and mixing in the context of grand unified theories that explains the curious fact that m_u ~ m_d even though m_t >> m_b. The structure of the quark mass matrices is such as to allow a non-Peccei-Quinn solution of the Strong CP Problem.
11 pages, ReVTeX4