Conveners
Tuesday 4: EDMs and/or Neutrons
- Eberhard Widmann (Austrian Academy of Sciences (AT))
Searches for permanent electric dipole moments (EDM) of fundamental particles and systems are among the most sensitive probes for CP violation beyond the Standard Model, which is required in order to explain the baryon asymmetry of the Universe. The current limit on the EDM of the neutron is set by our collaboration, $|d_n|$ < $1.8 \times 10^{-26}$ ecm (C.L. 90%) in the nEDM experiment....
To explain the open questions in the fundaments of physics, new theories that reach beyond the standard model of particle physics are needed. A great number of these indirectly predict electric dipole moments (EDM) of fundamental particles in ranges that are just within reach for modern atomic and molecular physics experiments. While measurements in atomic and molecular beams, and more...
The Neutron and Quantum Physics Group at TU Wien pursues various research approaches in the field of particles and cosmology.
In this talk, I will present a precise determination of the weak axial vector coupling gA from a measurement of the -asymmetry in the decay of free neutrons and the relationship to the unitarity of the CKM matrix. New symmetry tests of various kinds are coming within...
Beta decay of a free neutron is the simplest form of "semi-leptonic" weak interaction and is free from nuclear structure effects. Despite the simplicity of the process, its lifetime measurement remains one of the most challenging measurements, bearing different results depending on the technique ("bottle" or "beam") [1, 2]. Another critical measurement from the decay is the correlation (Ao)...
