Theoretical corrections and world data for the superallowedftvalues in theβdecays ofTi42,Cr46,Fe50, andNi54

Prompted by recent measurements, we surveyed world data and calculated radiative and isospin-symmetry-breaking corrections for the superallowed ${0}^{+}\ensuremath{\rightarrow}{0}^{+}$ Fermi transitions from $^{42}\mathrm{Ti},^{46}\mathrm{Cr},^{50}\mathrm{Fe}$, and $^{54}\mathrm{Ni}$. This increases the number of such transition with a complete set of calculated corrections from 20 to 23. The results are compared with their equivalents for the mirror superallowed transitions from $^{42}\mathrm{Sc},^{46}\mathrm{V},^{50}\mathrm{Mn}$, and $^{54}\mathrm{Co}$. The predicted $ft$-value asymmetries of these mirror pairs are sensitive to the correction terms and provide motivation for improving measurement precision so as to be able to test the corrections. To aid in that endeavor, we present a parametrization for calculating the $f$ values for the new transitions to $\ifmmode\pm\else\textpm\fi{}0.01%$.