$B\to D_s\pi$ and the tree amplitude in $B\to {\pi }^{+}{\pi }^{-}$

Abstract

The recently-observed decay $B^0\to D_s^{+}{\pi }^{-}$ is expected to proceed mainly by means of a tree amplitude in the factorization limit: $B^0\to {\pi }^{-}{(W^{+})}^{\ast }$, ${(W^{+})}^{\ast }\to D_s^{+}$. Under this assumption, we predict the corresponding contribution of the tree amplitude to $B^0\to {\pi }^{+}{\pi }^{-}$. We indicate the needed improvements in data that will allow a useful estimate of this amplitude with errors comparable to those accompanying other methods. Since the factorization hypothesis for this process goes beyond that proved in most approaches, we also discuss independent tests of this hypothesis.

7 pages, LaTeX, 1 figure, to be submitted to Phys. Rev. D (Brief Reports)

References in corpus (5)

• QCD Factorization in B -> pi K, pi pi Decays and Extraction of Wolfenstein Parameters
• CLEO-c and CESR-c: A New Frontier in Weak and Strong Interactions
• Factorization in Color-Favored B Meson Decays to Charm
• Updated Analysis of Some Two-Body Charmless B Decays
• Information on $B\to \pi \pi$ Provided by the Semileptonic Process $B\to \pi l\nu$

Cited by in corpus (1)

• Measurements of Branching Fractions for B0 --> Ds+pi- and B0-bar --> Ds+K-