Looked at from a model-independent point of view, the existence of a non-zero first class induced tensor form factor appears to provide a substantial contribution to the observed $\mathrm{ft}$ asymmetry in mirror Gamow-Teller beta decays. However, we demonstrate that, when analyzed in terms of the impulse approximation, this is only a negligibly small effect.

RADIOACTIVITY Calculated contribution to $\mathrm{ft}$ asymmetry from first class induced tensor.

• Received 29 October 1980

DOI:https://doi.org/10.1103/PhysRevC.23.1829