Semileptonic decays in the limit of a heavy daughter quark
arXiv:0810.0543 · doi:10.1103/PhysRevD.78.074024
Abstract
The rate of the semileptonic decay b to c l v is calculated with order alphas^2 accuracy, as an expansion around the limit of equal masses of the b and c quarks. Recent results obtained around the limit of the c-quark much lighter than b are confirmed. Details of the new expansion method are described.
7 pages, 5 figures