B→πη(′),η(′)η(′)decays and NLO contributions in the pQCD approach

ZHANG Zhi-Qing; LIU Xin; XIAO Zhen-Jun

doi:10.1088/1674-1137/33/9/003

Chinese Physics C> 2009, Vol. 33> Issue(9) : 722-728 DOI: 10.1088/1674-1137/33/9/003

B→πη^(′),η^(′)η^(′)decays and NLO contributions in the pQCD approach

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Abstract：
By employing the perturbative QCD (pQCD) factorization approach, we calculate the full leading and the partial next-to-leading order (NLO) contributions to the seven B→πη^(′)and η^(′)η^(′) decays. For B⁺→π⁺η^(′) decays, the pQCD predictions for their decay rates agree very well with the data after the inclusion of the small NLO contributions. For neutral decays, the pQCD predictions are also consistent with the experimental upper limits and can be tested by the LHC experiments. The measured value of A_CP^dir(π±η)=－19±7% can also be accommodated by the pQCD approach.

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ZHANG Zhi-Qing, LIU Xin and XIAO Zhen-Jun. B→πη^(′),η^(′)η^(′)decays and NLO contributions in the pQCD approach[J]. Chinese Physics C, 2009, 33(9): 722-728. doi: 10.1088/1674-1137/33/9/003

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Received: 2009-01-09
Revised: 2009-02-04

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沈阳化工大学材料科学与工程学院沈阳 110142

B→πη^(′),η^(′)η^(′)decays and NLO contributions in the pQCD approach

Corresponding author: XIAO Zhen-Jun,

Received Date: 2009-01-09
Accepted Date: 2009-02-04
Available Online: 2009-09-05

Abstract:

By employing the perturbative QCD (pQCD) factorization approach, we calculate the full leading and the partial next-to-leading order (NLO) contributions to the seven B→πη^(′)and η^(′)η^(′) decays. For B⁺→π⁺η^(′) decays, the pQCD predictions for their decay rates agree very well with the data after the inclusion of the small NLO contributions. For neutral decays, the pQCD predictions are also consistent with the experimental upper limits and can be tested by the LHC experiments. The measured value of A_CP^dir(π±η)=－19±7% can also be accommodated by the pQCD approach.