We present a calculation of the renormalisation constants for the temporal vector current, ZV0 and spatial axial current, ZAk, to O(αs/M) for B→D transitions using the O(1/M) NRQCD action for both b and c quarks evaluated for a large range of mass parameters. Considerations for the renormalisation of the spatial vector current and the temporal axial current are discussed and initial results for a mixed lattice current are presented for the spatial vector current.
@article{arxiv.hep-lat/9809044,
title = {Current Renormalisation in NRQCD for Semi-leptonic $B\to D$ Decays},
author = {P. Boyle and C. Davies},
journal= {arXiv preprint arXiv:hep-lat/9809044},
year = {2016}
}