A next generation measurement of the electric dipole moment of the neutron
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Neutron EDM in Four Generation Standard Model
A fourth generation of quarks may provide sufficient CP violation for the baryon asymmetry of the Universe. We estimate the neutron electric dipole moment in the presence of the fourth generation, and find it would be dominated by the strange quark chromoelectric dipole moment, assuming it does not get wiped out by a Peccei-Quinn symmetry. With three loop analytical expression, 500 GeV heavy qu...
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We present a complete three-loop calculation of the electric dipole moment of the u and d quarks in the Standard Model. For the d quark, more relevant for the experimentally important neutron electric dipole moment, we nd cancellations which lead to an order of magnitude suppression compared with previous estimates. The electric dipole moment (EDM) of the neutron, d n , has been subject of expe...
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We present a complete three-loop calculation of the electric dipole moment of the u and d quarks in the Standard Model. For the d quark, more relevant for the experimentally important neutron electric dipole moment, we find cancellations which lead to an order of magnitude suppression compared with previous estimates. The electric dipole moment (EDM) of the neutron, dn, has been subject of expe...
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I. Altarev(), S. Chesnevskaya(), W. Feldmeier(), P. Fierlinger(), A. Frei(), E. Gutsmiedl(), F. Kuchler(), P. Link(), T. Lins(), M. Marino(), S. Paul(), G. Petzoldt(), A. Pichlmaier(), R. Stoepler(), S. Stuiber(), B. Taubenheim() () Physikdepartment Technische Universität München and Excellence-Cluster ’Universe’ () Technische Universität München, Forschungsneutronenquelle Heinz Maier-Leibnitz ...
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We deduce a lower limit on the neutron electric dipole moment in the. Weinberg ansatz for CP violation. The resulting number is comparable to the existing experimental upper limit; this ansatz will therefore be critically tested by the next round of experiments using ultra-cold neutrons.
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