Chiral loop corrections in B to D l nu decays
High Energy Physics - Phenomenology
2008-10-14 v2
Abstract
We determine chiral loop corrections to the B meson decay amplitudes to positive and negative parity charmed mesons within a framework which combines heavy quark and chiral symmetries. We find that corrections due to states of opposite parity are competitive with the contributions arising from K and eta meson loops. Since lattice studies rely on the chiral behavior of the amplitudes we discuss the chiral limit of our results. We also comment on the extraction of 1/m_B, 1/m_D subleading form factors relevant for the studies of B_q to D_q tau nu decays, which are sensitive to possible helicity-suppressed new physics contributions.
Cite
@article{arxiv.0810.0461,
title = {Chiral loop corrections in B to D l nu decays},
author = {Jan O. Eeg and Svjetlana Fajfer and Jernej F. Kamenik},
journal= {arXiv preprint arXiv:0810.0461},
year = {2008}
}
Comments
4 pages, 2 figures, updated page style, references, contributed to proceedings of ICHEP08