2023 Belle II Physics Week

Session

Workshop: Vcb inclusive

Nov 1, 2023, 1:45 PM

Kobayashi Hall (KEK)

Conveners

Workshop: Vcb inclusive

• Rusa Mandal (IITGN)

Workshop: Vcb inclusive

• Lu Cao (BELLE (BELLE Gruppe))

19. Experimental developments of inclusive inputs

Lu Cao (BELLE (BELLE Gruppe))

11/1/23, 1:45 PM

Review of Belle/Belle II most recent measurements (q2 moments). 
Measurement of BR(B->Xc l nu) and other going/planned activities on Belle II: Mx, El moments from previous measurements can be updated using Belle II data; angular moments measurement is ongoing. Status, issues and needs for a new determination of the inclusive measurements (e.g. w/ q2 thresholds, approach for handling syst.).

20. Vub/Vcb inclusive measurement

Marcel Hohmann (BELLE (BELLE II Experiment)), Dr Phillip Urquijo (The University of Melbourne)

11/1/23, 2:15 PM

Recent Belle result (first BRs ratio measurement from inclusive decays) and prospects for the decay-width-ratio calculation (a part of th. error can be cancelled in ratio)

14. Vub/Vcb from lattice

Judd Harrison (Glasgow)

11/1/23, 2:50 PM

Lattice calculation of relevant form factors and future prospects

21. Theory progress for Vcb inclusive

Keri Vos

11/1/23, 3:20 PM

|Vcb| from q2 moments [JHEP 10, 068 (2022) ], BR(B->Xc l nu) is needed. Recent theoretical results on kin. moments including NP impacts [JHEP 02, 086 (2023)].

Exp wish-list from th. experts:

- recommended phase space region, kinematic threshold

- further needed exp. inputs 

- what’s beyond moments?

12. Loops in inclusive determination

Matteo Fael (CERN)

11/2/23, 1:45 PM

22. Challenges for a global inclusive analysis

Marzia Bordone (CERN)

11/2/23, 2:20 PM

Status (only Mx and El moments used), pros/cons of leptonic and hadronic moments. Would a global analysis ever be possible (and useful)? Guidance towards a global analysis -> fit OPE parameters, quark masses, BR