Revisiting the Kπ puzzle in the pQCD factorization approach
- 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 ACPsir (B0→K+π-)=(-6.5±3.1)% and ACPsir (B0→K+π0)=(2.2±2.0)%, become well consistent with the data due to the inclusion of the NLO contributions.