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Non-unitarity of CKM matrix from the vector singlet quark mixing and neutron electric dipole moment | | Yi Liao
; Xiaoyuan Li
; | | Date: |
8 May 2000 | | Journal: | Phys.Lett. B503 (2001) 301-306 | | Subject: | hep-ph | | Affiliation: | Tsinghua Univ.) and Xiaoyuan Li (ITP, CAS | | Abstract: | In the standard model (SM) the lowest order contribution to the quark electric dipole moment (EDM) occurs at the three loop level. We show that the non-unitarity of the CKM matrix in models with an extended quark sector typically gives rise to a quark EDM at the two loop level which has no GIM-like suppression factors except the external quark mass. The induced neutron EDM is of order 10^{-29} e cm and can be well within the reach of the next generation of experiments if it is further enhanced by long distance physics as happens in the SM. | | Source: | arXiv, hep-ph/0005063 | | Services: | Forum | Review | PDF | Favorites | |
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