A solution to B -> pi pi puzzle and B -> KK
- Authors
- Baek, Seungwon
- Issue Date
- 17-1월-2008
- Publisher
- ELSEVIER SCIENCE BV
- Citation
- PHYSICS LETTERS B, v.659, no.1-2, pp.265 - 269
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICS LETTERS B
- Volume
- 659
- Number
- 1-2
- Start Page
- 265
- End Page
- 269
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/124228
- DOI
- 10.1016/j.physletb.2007.11.029
- ISSN
- 0370-2693
- Abstract
- The large ratio of color-suppressed tree amplitude to color-allowed one in B -> pi pi decays is difficult to understand within the Standard Model, which is known as the "B -> pi pi puzzle". The two tree diagrams contain the up- and charm-quark component of penguin amplitude, P-uc, which cannot be separated by measuring B -> pi pi decays alone. We show that the measurements of the branching ratio and direct CP asymmetry of B+ -> K + (K-0) over bar decay enable one to disentangle the P-uc with two-fold ambiguity. One of the two degenerate solutions of the P,, can solve the B -> pi pi puzzle by giving C/T|0.3 which is consistent with the expectation in the Standard Model. We also show that the two solutions can be discriminated by the measurement of the indirect CP asymmetry of B-0 -> K-0(K-0) over bar. We point out that the corresponding puzzle in B -> pi K decays is not solved in this way. (C) 2007 Elsevier B.V. All rights reserved.
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