Heidelberg 2015 – wissenschaftliches Programm

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SYDM: Symposium Dipole Moments - A Tool to Search for New Physics

SYDM 2: Session 2

SYDM 2.1: Hauptvortrag

Dienstag, 24. März 2015, 14:30–15:10, C/gHS

The experimental search for the neutron electric dipole moment — •Klaus Kirch — ETH Zürich, Switzerland — Paul Scherrer Institut, Villigen, Switzerland

For 60 years, searches for the electric dipole moment (EDM) of the neutron have covered some six orders of magnitude in sensitivity improvement. Yet, the result is still consistent with zero. Time reversal symmetry forbids a finite EDM but the CP violation of the electroweak Standard Model will cause it to be non-zero. This finite value is tiny and out of reach for current and foreseeable future neutron EDM experiments. However, due to CP-violation expected in the strong interaction or in some new physics, the EDM could be much larger - with major implications if found. New experimental efforts aim at catching up with the long-time average of one order of magnitude sensitivity gain per decade. Recent progress and related physics measurements will be presented.