CHARMLESS 3-BODY B DECAYS: RESONANT AND NONRESONANT CONTRIBUTIONS
نویسندگان
چکیده
منابع مشابه
Charmless 3-body B Decays: Resonant and Nonresonant Contributions
Charmless 3-body decays of B mesons are studied using a simple model based on the framework of the factorization approach. We have identified a large source of the nonresonant signal in the matrix elements of scalar densities, e.g. 〈KK|s̄s|0〉. This explains the dominance of the nonresonant background in B → KKK decays, the sizable nonresonant fraction of order (35 ∼ 40)% in Kππ and K 0 ππ modes ...
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In the absence of first-principles calculations for hadronic matrix elements, it is customary to evaluate the matrix elements under the factorization hypothesis so that 〈O(μ)〉 is factorized into the product of two matrix elements of single currents, governed by decay constants and form factors. However, the naive factorized amplitude is not renormalization scaleand γ5 schemeindependent as the s...
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The light quarks inside B mesons are usually treated as spectators and do not affect the decay rates which are assumed to be purely due to b quark decays. In this paper we calculate the non-spectator contributions to inclusive charmless B decays due to the spectator effects. We find that the non-spectator contributions to the branching ratio for B̄ are small (< 2 × 10), but the contributions to ...
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Nonresonant three-body decays of D and B mesons are studied. It is pointed out that if heavy meson chiral perturbation theory (HMChPT) is applied to the heavy-light strong and weak vertices and assumed to be valid over the whole kinematic region, then the predicted decay rates for nonresonant charmless 3-body B decays will be too large and especially B− → π−K+K− greatly exceeds the current expe...
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In past years we have witnessed remarkable progress in the study of exclusive charmless B decays. Experimentally, CLEO [1] has discovered many new two-body decay modes B ! K ; K; K; K ; K ; 0 ; !K and found a possible evidence for B ! K . Moreover, CLEO has provided new improved upper limits for many other decay modes. While all the measured channels are penguin dominated, the most recently obs...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2008
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x08041888