Düsseldorf 2007 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 8: Precision Spectroscopy III

A 8.2: Vortrag

Dienstag, 20. März 2007, 14:30–14:45, 6G

Relativistic coupled-cluster theory of parity non-conservation in atomic systems — •Bijaya Kumar Sahoo — Max-Planck institute for the physics of complex systems

Our present understanding of elementary particle physics is encapsulated in the Standard Model (SM). Despite the remarkable success of this model, it is assumed as an intermediate manifestation of a complete theory. Parity non-conservation (PNC) in atomic systems which arises primarily from the neutral weak interaction between the electrons, and the nucleus has the potential to probe new physics beyond the SM. By combining the results of high precision measurements, and many-body calculations of atomic PNC observables, it is possible to extract the nuclear weak charge (Q_W), and compare with the corresponding value in the SM. A discrepancy between these two values could reveal the possible existence of new physics. We shall demonstrate application of the full fledged relativistic coupled-cluster theory which incorporates all the single,double and leading triple excitations to calculate parity non-conserving E1 amplitude in Ba⁺.