Chiral corrections to the scalar form factor in B_q to D_q transitions
High Energy Physics - Phenomenology
2008-11-26 v1 High Energy Physics - Lattice
Abstract
We consider chiral loop corrections to the scalar form factor in B_q to D_q l nu decays. First we consider chiral corrections to the 1/m_Q suppressed operators and then we propose the procedure for the extraction of the relevant form factor using lattice QCD results. In the case of B_s to D_s l nu decay we find that effects of kinematics and chiral corrections tend to cancel for the scalar form factor contributions. In particular the 1/m_Q suppression of chiral corrections is compensated by the SU(3) flavor symmetry breaking corrections which can be as large as 30%. The calculated corrections are relevant for the precise determination of possible new physics effects in B_q to D_q l nu decays.
Keywords
Cite
@article{arxiv.0807.0202,
title = {Chiral corrections to the scalar form factor in B_q to D_q transitions},
author = {Jan O. Eeg and Svjetlana Fajfer and Jernej F. Kamenik},
journal= {arXiv preprint arXiv:0807.0202},
year = {2008}
}
Comments
5 pages, 3 figures