English

The B-CP Puzzles in QCD Factorization

High Energy Physics - Phenomenology 2011-02-11 v1

Abstract

Within the framework of QCD factorization (QCDF), power corrections due to penguin annihilation can account for theobserved rates of penguin-dominated two-body decays of BB mesons and direct CP asymmetries ACP(Kπ+)A_{CP}(K^-\pi^+), ACP((Kπ+)A_{CP}((K^{*-}\pi^+), ACP((Kρ0)A_{CP}((K^-\rho^0) and ACP((π+π)A_{CP}((\pi^+\pi^-). However, the predicted direct CP-violating effects in QCDF for BKπ0,Kη,πηB^-\to K^-\pi^0,K^-\eta,\pi^-\eta and Bˉ0π0π0\bar B^0\to\pi^0\pi^0 are wrong in signs when confronted with experiment. We consider two different types of power correction effects in order to resolve the CP puzzles and rate deficit problems with penguin-dominated two-body decays of BB mesons and color-suppressed tree-dominated π0π0\pi^0\pi^0 and ρ0π0\rho^0\pi^0 modes: penguin annihilation and soft corrections to the color-suppressed tree amplitude.

Keywords

Cite

@article{arxiv.1012.5504,
  title  = {The B-CP Puzzles in QCD Factorization},
  author = {Hai-Yang Cheng and Chun-Khiang Chua},
  journal= {arXiv preprint arXiv:1012.5504},
  year   = {2011}
}

Comments

talk presented at the 15th International Conference in QCD, June 28- July 3, 2010, Montpellier, France

R2 v1 2026-06-21T17:04:15.323Z