Journal of Molecular Evolution

, Volume 6, Issue 2, pp 77–89 | Cite as

Neutral currents in weak interactions and molecular asymmetry

  • A. S. Garay
  • P. Hraskó


Weak interactions are parity violating forces, i.e. they differentiate between mirror images. Therefore it is a very attractive hypothesis to invoke weak interactions in explaining the origin of molecular asymmetry. It is, however, not clear whether weak interactions may operate between electrons and/or between electrons and protons? For these types of interactions so called neutral currents are needed. Recent experiments with muon neutrinos at CERN gave some evidence for the existence of neutral currents. Thus we may suppose that parity violating forces are active in molecules. In the first part of this paper a very elementary theory of weak interactions is outlined with special reference to the discovery of neutral currents. In the second part we show how weak interactions may differentiate between mirror image molecules. The asymmetrically distributed static charges in chiral molecules represent a helical potential field. This helical potential field may exert an effect on the orbital electrons and therefore coupling of spins and momenta occurs. Thus the enantiomers are parity transformed images not only as geometrical bodies, but their orbital electrons are parity transformed too as "a helical electron gas". Weak interactions will differentiate between L and D forms because their orbital electrons have a nonzero spin polarization with respect to their velocity.

Key words

Optical Asymmetry Chirality Weak Interactions Neutral Currents 


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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • A. S. Garay
    • 1
  • P. Hraskó
    • 1
  1. 1.Institute of BiophysicsBiological Research CenterSzegedHungary

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