Parameterization of the statistical rate function for select superallowed transitions

Abstract

We present a parameterization of the statistical rate function, f, for 20 superallowed 0+-to-0+ nuclear beta transitions between T=1 analog states, and for 18 superallowed "mirror" transitions between analog T=1/2 states. All these transitions are of interest in the determination of V_{ud}. Although most of the transition Q_{EC} values have been measured, their precision will undoubtedly be improved in future. Our parameterization allows a user to easily calculate the corresponding new f value to high precision (+/-0.01%) without complicated computing.

5 pages

References in corpus (4)

• Superallowed 0+ to 0+ nuclear beta decays: A new survey with precision tests of the conserved vector current hypothesis and the standard model
• Superallowed nuclear beta decays: A critical survey with tests of CVC and the standard model
• Ft values of the T = 1/2 mirror beta transitions
• New limit on fundamental weak-interaction parameters from superallowed beta decay

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