Speaker
Description
“New physics” beyond the standard model, such as supersymmetric models, can imply violations of discrete symmetries, i.e. space parity (P), time-reversal (T) and charge conjugation (C). Many different hypothetical sources of simultaneous violation of P- and T-symmetry can be discussed on the elementary particle level, such as P,T-odd currents between quarks and electrons or permanent electric dipole moments (EDMs) of elementary particles. All these fundamental P,T-odd interactions could induce net P,T-odd moments in bound systems such as atoms and molecules[1]. Thus, a measurement of e.g. a permanent EDM of an atom or a molecule is difficult to interpret and predict due to possible interference of the various fundamental sources of P,T-violation. Nonetheless, due to enormous electronic structure enhancements of such P,T-odd effects in polar molecules, low-energy high-precision experiments on these molecules can give access to the TeV energy-regime[2, 3].
In this poster possible sources of discrete symmetry violation are summarised and their effects on molecular spectra are discussed. Requirements of molecules for high-precision spectroscopy that aims to measure a permanent molecular EDM are elucidated. Trends of P,T-violation within the periodic table of elements determined with quasi-relativistic calculations[4, 5] as well as measurement models for disentanglement of sources of P,T-violation in molecules are discussed[6, 7]. Simple analytical models, which are gauged by ab initio calculations, help to identify suitable molecules for experiments.
[1] I. B. Khriplovich and S. K. Lamoreaux, CP Violation without Strangeness (Springer, Berlin, 1997).
[2] D. DeMille, Physics Today 68, 34 (2015).
[3] V. Andreev, D. G. Ang, D. DeMille, J. M. Doyle, G. Gabrielse, J. Haefner, N. R. Hutzler, Z. Lasner, C. Meisenhelder, B. R. O’Leary, C. D. Panda, A. D. West, E. P. West, X. Wu, and A. C. M. E. Collabo- ration, Nature 562, 355 (2018).
[4] K. Gaul and R. Berger, J. Chem. Phys. 147, 014109 (2017).
[5] K. Gaul, R. Berger, J. Chem. Phys. accepted for publication, (2019), arXiv:1907.10432 [physics.chem-ph].
[6] K. Gaul, S. Marquardt, T. A. Isaev, and R. Berger, Phys. Rev. A 99, 032509 (2019), arXiv:1805.05494 [physics.chem-ph].
[7] K. Gaul and R. Berger, Phys. Rev. A accepted for publication, (2019), arXiv:1811.05749 [physics.chem-ph].
