New physics in B→ππ and B→πK decays

被引：0

作者：

Baek, Seungwon ^{[1
]}

机构：

[1] Yonsei Univ, Dept Phys, Seoul 120749, South Korea

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2006年 / 07期

关键词：

B-Physics; CP violation; rare decays; beyond standard model; CKM-ANGLE GAMMA; PI-K; ISOSPIN ANALYSIS; B-MESONS; PARAMETERS; PUZZLE;

D O I：

暂无

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We perform a combined analysis of B -> pi pi and B -> pi K decays with the current experimental data. Assuming SU( 3) flavor symmetry and no new physics contributions to the topological amplitudes, we demonstrate that the conventional parametrization in the Standard Model (SM) does not describe the data very well, in contrast with a similar analysis based on the earlier data. It is also shown that the introduction of smaller amplitudes and reasonable SU( 3) breaking parameters does not improve the fits much. Interpreting these puzzling behaviors in the SM as a new physics (NP) signal, we study various NP scenarios. We find that when a single NP amplitude dominates, the NP in the electroweak penguin sector is the most favorable. However, other NP solutions, such as NP residing in the QCD-penguin sector and color-suppressed electroweak penguin sector simultaneously, can also solve the puzzle.

引用

页数：14

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