  The standard NRQCD power counting breaks down and the OPE gives rise to
color-octet shape functions at the upper endpoint of the photon energy spectrum
in radiative Upsilon decay. Also in this kinematic regime, large Sudakov
logarithms appear in the octet Wilson coefficients, ruining the perturbative
expansion. Using SCET, the octet shape functions arise naturally and the
Sudakov logarithms can be summed using the renormalization group equations. We
derive an expression for the resummed octet energy spectrum.
