Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 9: Fundamentale Symmetrien
HK 9.3: Vortrag
Montag, 17. März 2014, 17:30–17:45, HZ 3
Parity Violation in Hydrogen and Deuterium Spectroscopy: A new Approach — •Philipp Weiß — Institut für Kernphysik, Forschungszentrum Jülich, 52425 Jülich, Germany
The planned experiment provides an opportunity to measure the four weak coupling constants and the weak mixing angle with high precission by the use of an atomic physics method. Hereby, it is possible to prove the predictions given by the Standard Model.
In the Breit-Rabi diagram (binding energy as function of external magnetic field) for hydrogen and deuterium there are crossings between the β hyperfine substates of the 2S1/2 state and the e and f substates of the 2P1/2 states. Direct transitions at these crossings are forbidden by parity conservation. However, the Standard Model predicts a small admixture of the parity-violating weak force due to the nonvanishing probability density function of the 2S electron inside the nucleus.
With the knowledge about spinfilters used in a Lamb-shift polarimeter it is possible to provide a beam of hydrogen or deuterium atoms in one single metastable substate. In a modified spinfilter the interesting transitions can be induced and observed. This seems to be a feasible way to measure the effect of parity violation due to the weak force and to test the Standard Model.