Rostock 2019 – scientific programme

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MO: Fachverband Molekülphysik

MO 12: High Resolution Spectroscopy and Precision Experiments

MO 12.7: Talk

Wednesday, March 13, 2019, 12:00–12:15, S HS 002 Biologie

Electronic Structure Theory for Molecular Precision Tests of New Physics — •Konstantin Gaul and Robert Berger — Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany

Detection of simultaneous violation of parity (P) and time-reversal (T) symmetry can imply physics beyond the Standard Model of particle physics. Permanent electric dipole moments (EDMs) violate both P- and T-symmetry. EDMs of elementary particles or nuclei and P,T-odd electron-nucleus current interactions can induce a permanent EDM in atoms and molecules. Due to enormous electronic structure enhancements of P,T-odd effects in polar molecules, low-energy high-precision experiments on these molecules can give access to the TeV energy-regime. These precision tests are the most promising experiments for a first measurement of a permanent EDM the electron[1].

We discuss requirements of molecules for those high-precision measurements that aim to find new physics. Trends of P,T-violation within the periodic system of elements determined with quasi-relativistic calculations[2] are discussed and measurement models for disentanglement of sources of P,T-violation in molecules are presented[3]. Simple analytical models, which are gauged by ab initio calculations, help to choose promising molecules for future experiments.

[1] ACME collaboration, Nature 562, 355 (2018).

[2] K. Gaul et. al., J. Chem. Phys. 147, 014109 (2017).

[3] K. Gaul et. al., arXiv:1805.05494, arXiv:1811.05749.