| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1850871 | Physics Letters B | 2015 | 8 Pages |
Abstract
The two-loop quantum chromodynamics (QCD) radiative corrections to the BcBc meson leptonic decay rate are calculated in the framework of the non-relativistic QCD (NRQCD) factorization formalism. Two types of master integrals appearing in the calculation are obtained analytically for the first time. We calculate the short-distance coefficient of the leading matrix element to order αs2 by matching the full perturbative QCD calculation results to the corresponding NRQCD results. The result presented in this work helps the evaluation of both the BcBc leptonic decay constant and the Cabibbo–Kobayashi–Maskawa (CKM) matrix element |Vcb||Vcb| to the full next-to-next-to-leading-order (NNLO) degree of accuracy.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Long-Bin Chen, Cong-Feng Qiao,