期刊
PHYSICS LETTERS B
卷 653, 期 2-4, 页码 241-248出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2007.08.012
关键词
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The two-loop contribution to the electric dipole moment (EDM) and the chromo-electric dipole moment (CEDM) of an arbitrary fermion f induced by the most general renormalizable tbW coupling with complex left- and right-handed components (a(L) and a(R)) is calculated. The analytical expressions are numerically evaluated and the current experimental constraints on the electron, neutron and mercury atom EDMs are used to obtain a bound on the complex phase Im(a* aR)- It is found that the most stringent constraint, Im(a(L)*a(R)) < 2.33 x 10(-2), L arises from the neutron EDM. (c) 2007 Elsevier B.V. All rights reserved.
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