A U-spin Puzzle in $B$ Decays

Bhubanjyoti Bhattacharya, Suman Kumbhakar, David London +1

We impose U spin symmetry ($SU(2{)}_{\mathrm{Uspin}}$) on the Hamiltonian for $B$ decays. As expected, we find the equality of amplitudes related by the exchange $d\leftrightarrow s$. We…