I discuss factorization in SCET at next-to-leading power (NLP) for quark-induced Drell-Yan scattering at low $q_{\perp}^2$ and Deep Inelastic Scattering in the $x\to 1$ limit. Using a SCET approach with no explicit soft or collinear modes, I discuss the fact that spurious endpoint and rapidity divergences which naively spoil factorization in SCET cancel when double-counting of degrees of...
Exclusive non-leptonic $B$-meson decays provide a precision laboratory for tests of flavour-changing weak transitions.
While the factorization of the decay amplitude is well understood in the heavy-quark limit since more than two decades, very little is known so far about power-corrections.
One particular class of such suppressed effects are the so-called weak-annihilation topologies. With...
