From deep inelastic scattering to heavy-flavor semileptonic decays: Total rates into multihadron final states from lattice QCD

Calculating low-energy processes with multiple hadrons in the final state nonperturbatively, in lattice QCD, is very challenging. The authors propose a finite volume method that allows the calculation of the total rate of such processes and test it in a toy example, opening a new venue for lattice-QCD computations.