Physics / Fizik
Permanent URI for this collectionhttps://hdl.handle.net/11147/6
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Conference Object On the Sources of Cp-Violation Contributing To the Electric Dipole Moments(IPM, 2006) Demir, Durmuş Ali; Farzan, YasamanIn the framework of seesaw mechanism embedded in the constrained Minimal Supersymmetric Standard Model (cMSSM), phases of neutrino Yukawa coupling, μ-term and A-terms can all contribute to the Electric Dipole Moment (EDM) of the electron. We discuss and classify the situations for which by combined analysis of the upcoming results on de, dHg and dD discriminating between these sources will be possible.Article Citation - WoS: 7Citation - Scopus: 3Correlating Μ Parameter and Right-Handed Neutrino Masses in N = 1 Supergravity(Springer Verlag, 2006) Demir, Durmuş Ali; Farzan, YasamanThe minimal supersymmetric standard model, when extended to embed the seesaw mechanism, obtains two dimensionful parameters in its superpotential: the μ parameter and the right-handed neutrino mass MN. These mass parameters, belonging to the supersymmetric sector of the theory, pose serious naturalness problems as their scales are left completely undetermined. In fact, for correct phenomenology, μ must be stabilized at the electroweak scale while MN lies at an intermediate scale. In this work we construct an explicit model of the hidden sector of N ≤ 1 supergravity for inducing both μ and MN at their right scales. The model we build utilizes lepton number conservation and continuous R invariance as two fundamental global symmetries to forbid bare μ and MN appearing in the superpotential, and induces them at phenomenologically desired scales via spontaneous breakdown of the global symmetries and the supergravity. We discuss briefly various phenomenological implications of the model.Article Citation - WoS: 7Citation - Scopus: 9Can Measurements of Electric Dipole Moments Determine the Seesaw Parameters?(Springer Verlag, 2005) Demir, Durmuş Ali; Farzan, YasamanIn the context of the supersymmetrized seesaw mechanism embedded in the Minimal Supersymmetric Standard Model (MSSM), complex neutrino Yukawa couplings can induce Electric Dipole Moments (EDMs) for the charged leptons, providing an additional route to seesaw parameters. However, the complex neutrino Yukawa matrix is not the only possible source of CP violation. Even in the framework of Constrained MSSM (CMSSM), there are additional sources, usually attributed to the phases of the trilinear soft supersymmetry breaking couplings and the mu-term, which contribute not only to the electron EDM but also to the EDMs of neutron and heavy nuclei. In this work, by combining bounds on various EDMs, we analyze how the sources of CP violation can be discriminated by the present and planned EDM experiments.