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Title:TESTING THE PARITY SYMMETRY IN COLD CHIRAL MOLECULES USING VIBRATIONAL SPECTROSCOPY
Author(s):Cournol, Anne
Contributor(s):Darquie, Benoit; Tarbutt, Michael; Wall, Thomas; Hendricks, Richard J.; Motiyenko, R. A.; Margulès, L.; Huet, Therese R.; Berger, Yann ; Asselin, Pierre; Chardonnet, Christian; Amy-Klein, Anne; Daussy, Christophe; Lopez, Olivier; Shelkovnikov, Al
Subject(s):Fundamental interest
Abstract:Parity violation (PV) has never been observed in chiral molecules. Caused by the weak nuclear force, PV should lead to a tiny energy difference between the enantiomers of a chiral molecule, and in turn to frequency differences in the rovibrational spectra of the two enantiomers of a chiral molecule. A successful PV measurement will shed some light on the origins of biomolecular homochirality. It can also constitute a test of the standard model in the low-energy regime and a probe of physics beyond it, and serve as a stringent benchmark in relativistic quantum chemistry calculations. We present our ongoing work towards developing the technologies needed for measuring PV in chiral molecules via Ramsey interferometry in the mid-infrared. This includes amongst other things developing frequency stabilised quantum cascade lasers calibrated against primary standards and a buffer-gas source of organo-metallic species of interest for a PV measurement formed using laser ablation of solid-state molecules in a cryogenic cell containing gaseous helium at 4~K. We also present the results of preliminary spectroscopic investigations conducted on various species, in particular methyltrioxorhenium (MTO), an achiral test molecule from which promising chiral derivatives have recently been synthesized. We report on the high-resolution spectroscopy of MTO, both in cells and in molecular beams, at various temperatures and resolutions.
Issue Date:06/22/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100632
DOI:10.15278/isms.2018.FD04
Other Identifier(s):FD04
Date Available in IDEALS:2018-08-17
2018-12-12


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