29 June 2019 to 2 July 2019
Asia/Shanghai timezone

Direct CP violation in charmed meson decays

1 Jul 2019, 10:30
三楼会议室 (新疆乌鲁木齐金谷大酒店)





鄭 海揚 (中央研究院物理研究所)


In 2012 Cheng-Wei Chiang and I have studied direct CP violation in singly Cabibbo-suppressed D decays within the topological diagram approach. We concluded that the direct CP asymmetry difference \Delta A_{CP} between D0 -> K+ K- and D0 -> pi+ pi- is about (-0.139+/- 0.004)\% and (-0.151+/-0.004)\% for the two solutions of W-exchange amplitudes, respectively. The first observation of CP violation in the charm sector was recently announced by LHCb with the result \Delta A_{CP}=(-0.154+/-0.029)\%. This is a great triumph of the standard model. In this talk I'll discuss its implications and present new predictions in other D -> PP and VP modes (P: pseudoscalar meson, V: vector meson).

Presentation Materials

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