Year: 2002
Type: article
Abstract: Toward the goal of extracting the weak angle $\ensuremath{\alpha},$ the decay ${B}^{0}/{B}^{0}\ensuremath{\rightarrow}{a}_{0}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}$ was recently measured. The decay ${B}^{0}\ensuremath{\rightarrow}{a}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ is not only forbidden in the factorization limit of the tree interaction, but also strongly suppressed for the penguin interaction if short-distance QCD dominates. This makes the extraction of $\ensuremath{\alpha}$ very difficult from ${a}_{0}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}.$ We examine similar factorization-suppressed decays, in particular ${B}^{0}\ensuremath{\rightarrow}{b}_{1}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}.$ The prospect of obtaining $\ensuremath{\alpha}$ is even less promising with ${b}_{1}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}.$ To probe how well the short-distance dominance works, we emphasize the importance of testing helicity conservation in the charmless B decays with spins.
Author: Mahiko Suzuki
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2018835617