Abstract
In the Kobayashi-Maskawa model we compute a new contribution to the neutron electric dipole moment induced byCP violating flavour-changing transitions of the typess→d+gluon+γ through heavy quark loops. This contribution, essentially given by the triangle anomaly graph, is by itself gauge invariant. We obtain from this mechanismD n /e=3.10−32 cm, one order of magnitude below our previous estimate from usual penguin diagram contributions.
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Laboratoire associé au Centre National de la Recherche Scientifique
Groupe de recherche associé au Centre National de la Recherche Scientifique
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Gavela, M.B., Le Yaouanc, A., Oliver, L. et al. Contribution of the triangle graphs to the neutron electric dipole moment. Z. Phys. C - Particles and Fields 23, 251–261 (1984). https://doi.org/10.1007/BF01546193
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DOI: https://doi.org/10.1007/BF01546193