Direct CP asymmetry in D -> pi(-)pi(+) and D -> K-K+ in QCD-based approach

作者：Khodjamirian Alexander; Petrov Alexey A^*

来源：Physics Letters B, 2017, 774: 235-242.

DOI：10.1016/j.physletb.2017.09.070

We present the first QCD-based calculation of hadronic matrix elements with penguin topology determining direct CP-violating asymmetries in D-0 -> pi(-)pi(+) and D-0 -> K(-)K(+)nonleptonic decays. The method is based on the QCD light-cone sum rules and does not rely on any model-inspired amplitude decomposition, instead leaning heavily on quark-hadron duality. We provide a Standard Model estimate of the direct CP-violating asymmetries in both pion and kaon modes and their difference and comment on further improvements of the presented computation.

• 出版日期2017-11-10