Probe the Strength of Annihilation In BS→ππ Decays Within QCD Factorization

  • Using the method of QCD factorization, we calculate the branching ratio and the CP violation for pure annihilation decay BS→ππ in the Standard Model. Meanwhile, we employ an effective gluon mass resulted in the study of the infrared behaviour of gluon propagators to avoid the soft endpoint divergence. We find that the CP-averaged branching ratio is about 1.24×10-7, and the penguin diagram contributions is dominant in this process. The direct CP violation parameter is about -0.05, while the mixing-induced CP asymmetry is a quite large number of 0.18. Once these quantities can be measured in the future LHC-b experiments, studying such a process will enrich our knowledge on the dynamics of the charmless hadronic decay of B-meson and the property of gluon.
  • 加载中
  • 加载中

Get Citation
LU Gong-Ru, SU Fang, YANG Ya-Dong and HAO Hong-Jun. Probe the Strength of Annihilation In BS→ππ Decays Within QCD Factorization[J]. Chinese Physics C, 2006, 30(6): 501-506.
LU Gong-Ru, SU Fang, YANG Ya-Dong and HAO Hong-Jun. Probe the Strength of Annihilation In BS→ππ Decays Within QCD Factorization[J]. Chinese Physics C, 2006, 30(6): 501-506. shu
Milestone
Received: 2005-07-25
Revised: 2006-01-21
Article Metric

Article Views(2279)
PDF Downloads(625)
Cited by(0)
Policy on re-use
To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

Probe the Strength of Annihilation In BS→ππ Decays Within QCD Factorization

    Corresponding author: SU Fang,
  • Department of Physics, Henan Normal University, Xinxiang 453007, China

Abstract: Using the method of QCD factorization, we calculate the branching ratio and the CP violation for pure annihilation decay BS→ππ in the Standard Model. Meanwhile, we employ an effective gluon mass resulted in the study of the infrared behaviour of gluon propagators to avoid the soft endpoint divergence. We find that the CP-averaged branching ratio is about 1.24×10-7, and the penguin diagram contributions is dominant in this process. The direct CP violation parameter is about -0.05, while the mixing-induced CP asymmetry is a quite large number of 0.18. Once these quantities can be measured in the future LHC-b experiments, studying such a process will enrich our knowledge on the dynamics of the charmless hadronic decay of B-meson and the property of gluon.

    HTML

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return