Chiral molecules as sensitive probes for direct detection of $\mathcal{P}$-odd cosmic fields

Abstract

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 $|b_0^{\mathrm{e}}|$ 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.

arXiv comment6 pages, 2 figures

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