Comparative analysis of non-perturbative effects in B -> Xu l anti-nul decays
Abstract
In order to extract the Cabibbo-Kobayashi-Maskawa matrix element |Vub| from B -> Xu l anti-nul decays, the overwhelming background from B -> Xc l anti-nul decays must be reduced by appropriate acceptance cuts. We study the non-perturbative effects due to the motion of the b quark inside the B meson on the phenomenologically relevant decay distributions of B -> Xu l anti-nul in the presence of such cuts in a comparative analysis based on shape functions and the parton model in the light-cone limit. Comparisons with recent data from the CLEO, BABAR, and BELLE collaborations favor the shape-function approach.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.