@article{oai:aue.repo.nii.ac.jp:00004709,
 author = {松田, 正久 and 松岡, 武夫},
 issue = {4},
 journal = {素粒子論研究},
 month = {Jan},
 note = {text, The quark mixing matrix V_<CKM> is studied in depth on the basis of superstring inspired SU(6) x SU(2)_R model with global flavor symmetries. The sizable mixings between right-handed down-type quark D^c and colored Higgs field g^c potentially occur but no such mixings in up-type quark sector. In the model the hierarchical pattern of V_<CKM> is understood systematically. It is shown that due to large D^c-g^c mixings V_<ub> is naturally suppressed compared to V_<td>. It is pointed out that the observed suppression of V_<ub> is in favor of the presence of SU(2)_R gauge symmetry but not in accord with generic SU(5) GUT.},
 pages = {D82--D85},
 title = {Quark Mixings in SU(6)×SU(2)_R and Suppression of V_<ub>},
 volume = {102},
 year = {2001}
}