https://doi.org/10.1140/epjd/e2002-00133-0
Improved sensitivity in the search for a parity-violating energy difference in the vibrational spectrum of the enantiomers of CHFClBr
Laboratoire de Physique des Lasers (UMR 7538 du CNRS) , Université Paris 13,
99 avenue J.-B. Clément, 93430 Villetaneuse, France
Corresponding author: a chardonn@galilee.univ-paris13.fr
Received:
22
January
2002
Published online:
19
July
2002
The theoretical prediction that enantiomers of chiral molecules have different spectra because of parity
violation associated with neutral currents in the weak interaction has been experimentally looked for.
Last searches of a frequency difference in the vibrational spectrum of the enantiomers of CHFClBr
obtained with our infrared saturation spectrometer is presented. The frequencies of a saturation
resonance of separated enantiomers of CHFClBr have been compared at a 
level. A residual
pressure shift probably induced by uncontrolled impurities of the samples has been observed and found
to limit our experimental sensitivity. Finally no parity violating frequency difference is observed within
the present sensitivity of 
. A new experimental scheme is proposed which should let the parity
violation effect observable.
PACS: 33.15.Bh – General molecular conformation and symmetry; stereochemistry / 11.30.Er – Charge conjugation, parity, time reversal, and other discrete symmetries / 33.20.Ea – Infrared spectra
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
