Charmless Hadronic B Decays into a Tensor Meson

Understand

Two-body charmless hadronic B decays involving a tensor meson in the final state are studied within the framework of QCD factorization (QCDF).

• Due to the G-parity of the tensor meson, both the chiral-even and chiral-odd two-parton light-cone distribution amplitudes of the tensor meson are antisymmetric under the interchange of momentum fractions of the quark and anti-quark in the SU(3) limit.
• Our main results are: (i) In the naive factorization approach, the decays such as $B^-\to \bar K_2^{*0}\pi^-$ and $\bar B^0\to K_2^{*-}\pi^+$ with a tensor meson emitted are prohibited owing to the fact that a tensor meson cannot be created from the local V-A or tensor current.
• Nevertheless, they receive nonfactorizable contributions in QCDF from vertex, penguin and hard spectator corrections.