EntityQ2620219· pop 12· linked from 14 articlesKoide formulaSign in to saveunexplained empirical equation in particle physicsConnectionsHiggs bosonEntityPhysics LettersEntityBerlinEntitySingaporeCountrymassEntityelectronEntityInternational Standard Book NumberEntityHeidelbergEntityquarkEntitydigital object identifierEntityneutrinoEntityelectronvoltEntitymuonEntityscalar productEntityquantum field theoryEntitybibcodeEntitynumerologyEntitytauEntityQ118398Entityup quarkEntityCategories1980s in scienceEmpirical lawsLeptonsUnsolved problems in physics