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Production of P-wave Charmed Mesons in Hadronic B Decays by Cheng, Hai-Yang; Chua, Chun-Khiang is a scholarly article available to read on EtoBox.

What is Production of P-wave Charmed Mesons in Hadronic B Decays about?

Production of even-parity charmed mesons in hadronic B decays is studied. Specifically, we focus on the Cabibbo-allowed decays $\bar B\to D^{**}\pi$ and $\bar D^{**}_sD^{(*)}$, where $D^{**}$ denotes generically a p-wave charmed meson. While the measured color-allowed decays $\bar B^0\to D^{**+}\pi^-$ are consistent with the theoretical expectation, the experimental observation of $B^-\to D^{**0}\pi^-$ for the broad $D^{**}$ states is astonishing as it requires that the color-suppressed contribution dominates over the color-allowed one, even though the former is $1/m_b$ suppressed in the heavy quark limit. In order to accommodate the data of $\bar B\to D^{**}\pi^-$, it is found that $a_2/a_1\approx -0.5$ with a sign opposite to that in $\bar B\to D\pi$ decays, where $a_1$ and $a_2$ are the effective Wilson coefficients for color-allowed and color-suppressed decay amplitudes, respectively. The decay constants and form factors for $D^{**}$ and the Isgur-Wise functions $\tau_{1/2}(\omega)$ and $\tau_{3/2}(\omega)$ are extracted from the data of $B\to D^{**}\pi$ decays. The Isgur-Wise functions calculated in the covariant light-front quark model are in good agreement with experiment. T

Author

Cheng, Hai-Yang; Chua, Chun-Khiang

Published

2006

Language

EN