Title: MEASUREMENT OF THE CKM MATRIX ELEMENT |V<sub><i>ub</i></sub>| AND EXCLUSIVE <i>B</i> → πℓν AND <i>B</i> → ρℓν DECAYS
Abstract: ▪ Abstract The magnitude of the CKM matrix element |V ub | plays an important role in testing the unitarity of the CKM matrix. The first measurements of the exclusive b → u quark transitions [Formula: see text] and [Formula: see text], and the subsequent determination of |V ub |, are reviewed here.