SAMOP 2023 – scientific programme

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A: Fachverband Atomphysik

A 11: Precision Spectroscopy of Atoms and Ions II (joint session A/Q)

A 11.4: Talk

Tuesday, March 7, 2023, 11:45–12:00, F303

Minimizing entanglement of sources of P,T-violation with complementary low-energy experiments — •Konstantin Gaul and Robert Berger — Fachbereich Chemie, Philipps-Universität Marburg,Hans-Meerwein-Straße 4, 35032 Marburg, Germany

The detection of an atomic or molecular P,T-odd electric dipole moment (EDM) would be a direct evidence of physics beyond the Standard Model. Internal enhancement effects render atoms and molecules very promising candidates for a first direct detection of P,T-violation. The EDM of an atom or molecule stems from various fundamental sources of P,T-violation, such as P,T-odd currents or EDMs of elementary particles [1]. Therefore, interpretations and predictions of EDMs are difficult and several experiments are required for a global model-independent analysis of the results [2]. In this contribution all sources of the P,T-odd EDMs of atoms and molecules are studied within a simple qualitative electronic-structure model in terms of electronic and nuclear angular momenta and the nuclear charge number. For comparison accurate calculations of the electronic structure parameters [3] of most experimentally relevant atoms and molecules are performed and selection of good candidates for future experiments is discussed in the light of minimizing the coverage region in the global P,T-odd parameter space.

[1] Khriplovich, Lamoreaux, CP Violation without Strangeness (1997).

[2] Jung, JHEP 2013, 168 (2013); Engel et al., PPNP 71, 21 (2013); Chupp, Ramsey-Musolf, PRC 91, 035502 (2015).

[3] Gaul et al., PRA 99, 032509 (2019); JCP 152, 044101 (2020).