Measurements of Branching fractions and CP Asymmetries of B→ηh decays
碩士 === 國立臺灣大學 === 物理研究所 === 99 === We present the improved measurements of the B -> ηh branching fraction and CP asymmetries using a data sample of 711 fb−1 that contains 771.58 million BB pairs collected on Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e− collider. Her...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | en_US |
| Published: |
2011
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/53506534299571345119 |
| Summary: | 碩士 === 國立臺灣大學 === 物理研究所 === 99 === We present the improved measurements of the B -> ηh branching fraction and CP asymmetries using a data sample of 711 fb−1 that contains 771.58 million BB pairs collected on Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e− collider. Here h means π±, K± and
K0S . And η is selected in η -> γγ and η -> π+π−π0 decays.
The evidence of CP asymmetry for B± -> ηK± is found with 3.8 σ, and 3.0 σ in B± -> ηπ± CP asymmetry. The branching fraction of B0 -> ηK0 is observed with 5.4 σ standard deviation from zero.
|
|---|