Speaker
Prof.
George W.S. Hou
(National Taiwan University)
Description
The LHCb experiment has measured CP violation (CPV) across the Dalitz plot of charmless decays of B mesons to 3 charged tracks, namely in Kππ, KKK, πππ, and πKK final states, with strikingly large CPV and strong variations with Dalitz variables. If one identifies these processes with b → sqq(bar), sss(bar) and b → dqq(bar), dss(bar), where q = u, d, then the “sum rule” that requires two-loop absorptive parts by unitarity works well for inclusive b → s CPV, but less well for the inclusive b → d case. The situation is discussed and remedied, making the 30 years old unitarity argument valid to this day, and affirming quark-hadron duality.
Primary author
Prof.
George W.S. Hou
(National Taiwan University)
