Particular advantages of chiral molecules for direct detection of the time-dependence of pseudoscalar and the timelike-component of pseudovector cosmic fields are highlighted. Such fields are invoked in different models for cold dark matter or in the Lorentz-invariance violating standard model extensions and thus are signatures of physics beyond the standard model. The sensitivity of a twenty year old experiment with the molecule CHBrClF to pseudovector cosmic fields as characterized by the parameter $|b^\mathrm{ e}_0|$ is estimated to be $\mathcal{ O}(10^{ -12}\,\mathrm{ GeV})$ and allows to predict the sensitivity of future experiments with favorable choices of chiral molecular probes to be $\mathcal{ O}(10^{ -17}\,\mathrm{ GeV})$, which will be an improvement of the present best limits by at least two orders of magnitude.
Categories: hep-ph physics.atom-ph physics.chem-ph