CP Violation and Nonleptonic B-meson Decays via kT Factorization (QCDにもとづいたB中間子崩壊の研究)

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概要

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• We discuss the perturbative QCD approach for exclusive non-leptonic two body B-meson decays. We briefly review its ingredients and some important theoretical issues related to the factorization approach. PQCD results are compatible with present experimental data for the charmless B-meson decays. We predict the possibility of large direct CP violation effects in B^O→π^+π^- (23±7%) and B^O→K^+π^- (-17±5%). For charmed decay B→D^<(*)>π, we get large non-factorizable contributions for Color-suppressed decays and obtain |a_2/a_1| 〜0.4-0.5 and Arg(a_2/a_1)〜-42^O. In the last section we investigate the method to extract the weak phases φ_2 from B→ππ decay and φ_3 from Kπ modes. From BaBar measurement of CP asymmetry for the π^+π^- decay, the prefered CKM weak phases are: φ_1=(24±2)^O, φ_2=(78±22)^O and φ_3=(78±22)^O.

• 素粒子論グループ 素粒子研究編集部の論文
• 2004-06-20

著者

• Keum Y.

  Department Of Physics Nagoya University

• Keum Y.-Y.

  Department of Physics Nagoya University

関連論文

• CP Violation and Nonleptonic B-meson Decays via kT Factorization (QCDにもとづいたB中間子崩壊の研究)

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