Two body charmless B decays involving eta and eta-prime
Journal
Physics Review
Journal Volume
D68
Pages
074012
Date Issued
2003-06
Author(s)
Abstract
We discuss the implications of recent experimental data for B decays to two pseudoscalar mesons, with an emphasis on those with η and η′ in the final states. Applying a U-spin argument, we show that tree and penguin amplitudes, both in B+ → π+η and in B + → π+η+, are of comparable magnitudes. Nontrivial relative weak and strong phases between the tree-level amplitudes and penguin-loop amplitudes in the B±→π ±η modes are extracted. We predict the possible values for the averaged branching ratio and CP asymmetry of the B+ → π+η′ modes. We test the assumption of a singlet-penguin amplitude with the same weak and strong phases as the QCD penguin amplitude in explaining the large branching ratios of η′K modes, and show that it is consistent with current branching ratio and CP asymmetry data of the B + → (π0ηη′)K+modes. We also show that the strong phases of the singlet-penguin and tree-level amplitudes can be extracted with further input of electroweak penguin contributions and a sufficiently well-known branching ratio of the ηK + mode. Using SU(3) flavor symmetry, we also estimate required data samples to detect modes that have not yet been seen. © 2003 The American Physical Society.
Type
journal article