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Hadronic quarkonium decays at order<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>v</mml:mi><mml:mn>7</mml:mn></mml:msup></mml:math>
We compute the complete imaginary part of the nonrelativistic QCD (NRQCD) Lagrangian at order $1/{M}^{4}$ in the heavy-quark mass expansion, which includes center of mass operators, and at order ${\ensuremath{\alpha}}_{s}^{2}$ in the matching coefficients. We also compute the imaginary part of the NRQCD Lagrangian at order $1/{M}^{6}$ and at order …