Hindered M1 Radiative Decay of ${\rm Y}(2S)$ from Lattice NRQCD

Ciaran Hughes, Rachel J. Dowdall, Christine T. H. Davies +3

We present a calculation of the hindered M$1$ ${\rm Y}(2S)\to {\eta }_b(1S)\gamma$ decay rate using lattice non-relativistic QCD. The calculation includes spin-dependent relativistic corrections…