Speaker
Jinglong Zhu
Description
There is a longstanding tension between inclusive and exclusive |Vcb| determinations of Cabibbo-Kobayashi-Maskawa matrix element, i.e. Vcb puzzle. In this work, a nontrivial analytical structure of the quark propagator, indicated from the perspective of color confinement, is included for the first time in the inclusive B decay. To discuss the possibility of solving the Vcb puzzle, the observables B_d^0 lifetime and |Vcb| are analyzed. It is shown that the previous inclusive value based on operator product expansion is improved and thereby a possible resolution to the Vcb puzzle is given, which can be clarified with future determinations of parameters describing the complex conjugate poles.
