Simultaneous extractions of |Vub| and |Vcb| with only the exclusive Λb decays

Publication date: 10 July 2018Source: Physics Letters B, Volume 782Author(s): Y.K. Hsiao, C.Q. GengAbstractWe perform the simultaneous |Vub| and |Vcb| extractions with only the exclusive Λb decays of Λb→(p,Λc+)μν¯μ, Λb→pπ− and Λb→Λc+(π−,D−). We obtain that |Vub|=(3.7±0.3)×10−3 and |Vcb|=(45.9±2.7)×10−3. Our value of |Vub| is larger than that of (3.27±0.15±0.16±0.06)×10−3, previously extracted by the LHC Collaboration from the exclusive Λb decays also, but nearly identical to (3.72±0.19)×10−3 from the exclusive B decays. On the other hand, our extracted result of |Vcb| favors the value of (42.2±0.8)×10−3 from the inclusive B decays.

Source: Physics Letters B - July 10, 2018 Category: Physics Source Type: research