References

Testing Factorization

“…Significant improvement in precision is required to isolate factorization breaking effects in the above decays. Alternatively, one can study factorization in those decays, where the corrections to factorization are not hidden behind a large factorizable contribution [11,12]. Then less precision is required, although for the price of less events.…”

“…Recently, it has been proposed to explore factorization with final states whose coupling to the W -boson is suppressed either because the spin > 1 or the decay constant is suppressed [11]. Examples of such 'designer mesons' are given in Table 1.…”

“…The decay constants of the mesons in Table 1 are only poorly known. The current theory spread as compiled in [11] reads as…”

“…The decay constants of a 0 , π(1300), b 1 , K * 0 mesons could be determined in hadronic τ-decays. Estimates of the corresponding [11] and the corresponding τ → ν τ X branching ratios.…”

“…Since form factors for designer mesons are not anomalous, this topology escapes suppression. Examples of modes which satisfy the criteria and do have a suppressed factorizable contribution are given in Table 3, (for the full listing and details see [11]). There are many decays of B 0 , B ± , B s mesons and Λ b , Ω b baryons, many final states, which cover a wide range of masses (every particle can be replaced by another one with the same flavor content and W -coupling features), many topologies (tree, annihilation, penguin annihilation,...), and many classifications (color allowed, color suppressed).…”