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arXiv · 0810.0461

Chiral loop corrections in B to D l nu decays

Jan O. Eeg·Svjetlana Fajfer·Jernej F. Kamenik
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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.

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Jan O. Eeg, Svjetlana Fajfer, Jernej F. Kamenik. 2008-10-14. Chiral loop corrections in B to D l nu decays. https://arxiv.org/abs/0810.0461

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