Revisiting the K<em>&pi;</em> puzzle in the pQCD factorization approach

BAI Wei; LIU Min; FAN Ying-Ying; WANG Wen-Fei; CHENG Shan; XIAO Zhen-Jun

doi:10.1088/1674-1137/38/3/033101

Chinese Physics C> 2014, Vol. 38> Issue(3) : 033101 DOI: 10.1088/1674-1137/38/3/033101

Revisiting the Kπ puzzle in the pQCD factorization approach

1.
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210023, China

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Abstract：
In this paper, we calculated the branching ratios and direct CP violation of the four B→Kπ decays with the inclusion of all currently known next-to-leading order (NLO) contributions by employing the perturbative QCD (pQCD) factorization approach. We found that (a) Besides the 10% enhancement from the NLO vertex corrections, the quark-loops and magnetic penguins, the NLO contributions to the form factors can provide an additional ~15% enhancement to the branching ratios, and lead to a very good agreement with the data; (b) The NLO pQCD predictions are A_CP^sir (B⁰→K⁺π^-)=(-6.5±3.1)% and A_CP^sir (B⁰→K⁺π⁰)=(2.2±2.0)%, become well consistent with the data due to the inclusion of the NLO contributions.

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BAI Wei, LIU Min, FAN Ying-Ying, WANG Wen-Fei, CHENG Shan and XIAO Zhen-Jun. Revisiting the Kπ puzzle in the pQCD factorization approach[J]. Chinese Physics C, 2014, 38(3): 033101. doi: 10.1088/1674-1137/38/3/033101

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Received: 2013-05-03
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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

Revisiting the Kπ puzzle in the pQCD factorization approach

Corresponding author: XIAO Zhen-Jun,

1. Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210023, China

Received Date: 2013-05-03

Accepted Date: 1900-01-01

Available Online: 2014-03-05

Abstract: In this paper, we calculated the branching ratios and direct CP violation of the four B→Kπ decays with the inclusion of all currently known next-to-leading order (NLO) contributions by employing the perturbative QCD (pQCD) factorization approach. We found that (a) Besides the 10% enhancement from the NLO vertex corrections, the quark-loops and magnetic penguins, the NLO contributions to the form factors can provide an additional ~15% enhancement to the branching ratios, and lead to a very good agreement with the data; (b) The NLO pQCD predictions are A_CP^sir (B⁰→K⁺π^-)=(-6.5±3.1)% and A_CP^sir (B⁰→K⁺π⁰)=(2.2±2.0)%, become well consistent with the data due to the inclusion of the NLO contributions.

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Revisiting the Kπ puzzle in the pQCD factorization approach

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Revisiting the Kπ puzzle in the pQCD factorization approach

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