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http://hdl.handle.net/11154/1093
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Title: | Bound on the anomalous tbW coupling from two-loop contribution to neutron electric dipole moment |
Authors: | Tavares-Velasco, G Toscano, JJ Avilez-López, A Novales-Sánchez, H |
Issue Date: | 2007 |
Abstract: | 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. |
URI: | http://hdl.handle.net/11154/1093 |
ISSN: | 0370-2693 |
Appears in Collections: | Ciencias
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