Loading...
Please wait, while we are loading the content...
Similar Documents
A New Mechanism for B ± → η ′ K ± in Perturbative QCD
| Content Provider | Semantic Scholar |
|---|---|
| Author | Du, Dongsheng Kim, Choong Sun Yang, Yadong |
| Copyright Year | 1997 |
| Abstract | We present a new mechanism for B± → η′K±, and analyze it strictly within perturbative QCD. We find that such a new mechanism may dominate non-leptonic B-decays to light mesons. Within a reasonable parameter space, our prediction is in good agreement with the recent CLEO data on B± → η′K±. We conclude that there is no room for an abnormally large b → sg vertex from physics beyond the Standard Model. kim@cskim.yonsei.ac.kr, cskim@kekvax.kek.jp, http://phya.yonsei.ac.kr/ ̃cskim/ Email: duds@bepc3.ihep.ac.cn, yangyd@hptc5.ihep.ac.cn Mailing address Recently, the CLEO collaboration has reported a large η′ yield in charmless B decays as follows [1], BR(B± → ηXs) = (6.2 ± 1.6 ± 1.3) × 10−4 (2.0 < Pη′ < 2.7GeV ) , (1) and a corresponding large exclusive branching fraction [2] BR(B± → η′K±) = (7.1 −2.1 ± 0.9) × 10−5 . (2) It is another great experimental achievement in rare B decays since the measurements of B → K∗γ and B → Xsγ which involve the so-called QCDand electroweak-penguins. Since then, theoretical investigations on these decays have appeared, offering several interesting interpretations of the data, both within and beyond the Standard Model (SM) [3]. In particular, the decay mode (2) makes itself conspicuous due to its surprisingly large branching ratio. Now let us examine the theoretical status of the estimate of the exclusive branching fraction B(B± → η′K±). The standard theoretical framework to study non-leptonic B decays is based on the effective Hamiltonian which describes the decays at quark level, |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv.org/pdf/hep-ph/9711428v2.pdf |
| Alternate Webpage(s) | http://arxiv.org/pdf/hep-ph/9711428v3.pdf |
| Alternate Webpage(s) | http://arxiv.org/pdf/hep-ph/9711428v1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Email Hamiltonian (quantum mechanics) Interpretation Process Lattice QCD Mesons Perturbation theory (quantum mechanics) Population Parameter Spheniscidae Streptomycin Vertex |
| Content Type | Text |
| Resource Type | Article |
