CKM matrix elements from tree-level decays and b-hadron lifetimes

Abstract

We give an updated summary of the topics covered in Working Group I of the 2nd Workshop on the CKM Unitarity Triangle, with emphasis on the results obtained since the 1st CKM Workshop. The topics covered include the measurement of |V_{ub}|, of |V_{cb}| and of non-perturbative Heavy Quark Expansion parameters, and the determination of b-hadron lifetimes and lifetime differences.Comment: 12 pages, 8 figures. Based on Working Group I's summary talk given by L.L. for the group's convenors (Elisabetta Barberio (SMU), Lawrence Gibbons (Cornell), Toru Iijima (Nagoya), L.L.) at the 2nd Workshop on the CKM Unitarity Triangle, IPPP Durham, 5-9 April, 200