Status and prospects of Non-leptonic B meson decays

Gilberto Tetlalmatzi-Xolocotzi (University of Siegen)

The aim of this event is to discuss the current status in theory and experiment of non-leptonic B meson decays. This entails talks on calculation techniques, including QCD factorization and perturbative QCD with special emphasis on the current status of estimating power corrections. Moreover, this workshop will include sessions devoted to the discussion of different puzzles, old and new, arising within the context of purely hadronic B meson processes. Here, discrepancies between the theoretical and the experimental determinations may indicate either potential physics beyond the SM or a critical reassessment of our theory tools. Finally, future experimental prospects on the expected precision and the measurement of different non-leptonic channels will also be addressed.

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The workshop will be in a hybrid format, including sessions online and in  person and will take place in the city of Siegen, Germany which is located at the southern tip of North Rhine-Westfalia in the valley of the river Sieg. It is surrounded by a beautiful landscape shaped by forests, lakes and mountains of the ”Sauerland”, ”Rothaargebirge” and ”Westerwald”. Siegen is located centrally in Germany, around 125 km northwest of Frankfurt and 90 km east of Cologne. International airports are in Frankfurt, Cologne and Düsseldorf. Siegen has also a tiny local airport, in case participants plan to arrive with small private planes.



The University of Siegen has around 18.000 students and it has a large theoretical flavour physics group with around 40 members. Downtown Siegen offers many pubs, restaurants and cafes, but also theaters, cinemas and concert halls.


Organizing committee: Gilberto Tetlalmatzi-Xolocotzi (Chair,, Alexander Lenz(Chair, ), Arzu Ergüzel (Secretary,


(The pictures shown were kindly provided by Aleksei Rusov)

Participant Registration
  • Aleksey Rusov
  • Alexander Khodjamirian
  • Alexander Lenz
  • Alexei Pivovarov
  • Alexey Petrov
  • Ali Mohamed
  • Anastasia Boushmelev
  • Björn O. Lange
  • Christian Schneider
  • Daniel Busch
  • Daniel Moreno
  • Dennis Horstmann
  • Eleftheria Malami
  • Fu-Sheng Yu
  • Gael Finauri
  • Gilberto Tetlalmatzi-Xolocotzi
  • Guido Bell
  • Hai-Yang Cheng
  • Hsiang-nan Li
  • Ivan Boldin
  • Jakob Müller
  • Javier Virto
  • Keri Vos
  • Maria Laura Piscopo
  • Martin Beneke
  • Martin Sevior
  • Marzia Bordone
  • Matthew Black
  • Matthew Kirk
  • Min-Zu Wang
  • Nico Gubernari
  • Nicole Skidmore
  • Niels Tuning
  • Oliver Witzel
  • Patricia Magalhaes
  • Philipp Böer
  • Quentin Führing
  • Rusa Mandal
  • Sebastian Edelmann
  • Stefan Meiser
  • Stephanie Hansmann-Menzemer
  • Thomas Mannel
  • Thorsten Feldmann
  • Tobias Huber
  • Tom Tong
  • Xin-Qiang Li
  • Yu-Ming Wang
    • 08:55 10:30
      B meson non-leptonic decays theory
      • 09:00
        Rescattering effects in non-leptonic colour-allowed tree-level decays 30m
        Speaker: Syuhei Iguro (Karlsruhe, TTP)
      • 09:30
        Overview of pQCD for non-leptonic decays 30m
        Speaker: Hsiang-nan Li (Institute of Physics, Academia Sinica, Taiwan)
      • 10:00
        Non-leptonic B decays 30m
        Speaker: Hai-Yang Cheng (Academia Sinica, Taiwan)
    • 10:30 11:00
      Coffee Break 30m
    • 11:00 12:30
      B meson non-leptonic decays theory
      • 11:00
        Topological diagrams and SU(3) irreducible representations 30m
        Speaker: Fu-Sheng Yu (Lanzhou University)
      • 11:30
        Enhanced NLO corrections to Annihilations 30m
        Speaker: Yu-Ming Wang ( Nankai University)
      • 12:00
        Non-leptonic B decays 30m
        Speaker: Cai-Dian Lu (Beijing, Inst. High Energy Phys.)
    • 12:30 14:00
      Lunch Break 1h 30m
    • 14:00 22:00
      Excursion and Dinner 8h
    • 09:20 09:50
      Coffee Break 30m
    • 09:55 10:55
      New Physics in $B\rightarrow \pi K$ and $B\rightarrow D K$
    • 10:55 11:55
      New Physics in non-leptonic B meson decays
      • 10:55
        Review of New Physics in non-leptonic tree level B meson decays 30m
        Speaker: Matthew Kirk (ICC Barcelona)
      • 11:25
        New physics effects in $B_d,s \rightarrow K* K*$ 30m
        Speaker: Sebastian Descotes-Genon (Orsay, IJCLab)
    • 12:00 13:00
      Lunch Break 1h
    • 13:00 13:30
      Constraints on New Physics in non-leptonic decays
      • 13:00
        Collider bounds on BSM effects in non-leptonic B decays 30m
        Speaker: Marzia Bordone (CERN)
    • 13:30 14:30
      Experimental Outlook
      • 13:30
        LHCb outlook for non-leptonic decays 30m
        Speaker: Nicola Skidmore (CERN)
      • 14:00
        Charmless B decay at Belle II 30m
        Speaker: Prof. Min-Zu Wang
    • 14:30 15:00
      Coffee Break 30m
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