Abstract

Under a general class of assumptions we show that the present data for partiy violating effects in atomic bismuth and for inclusive neutral current neutrino (anti-) nucleon scattering exclude all SU(2) × U(1) gauge models except one, as far as the light quarks and light leptons are concerned. Furthermore the smallness of parity violation in Bi is a strong evidence for the existence of right-handed charged weak current.

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