Factorization and non-local 1/m b corrections in the decay B X s gamma

Michael Benzke
In this thesis, a systematic analysis of the \bar B \to X_s\gamma photon spectrum in the endpoint region is presented. The endpoint region refers to a kinematic configuration of the final state, in which the photon has a large energy m_b-2E_\gamma = O(\Lambda_QCD), while the jet has a large energy but small invariant mass. Using methods of soft-collinear effective theory and heavy-quark effective theory, it is shown that the spectrum can be factorized into hard,...
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