Name: Belle II Germany Meeting 2025
Start: 2025-09-08T13:00:00+02:00
End: 2025-09-10T21:50:00+02:00
Location: ROT building

Belle II Germany Meeting 2025

from Monday, 8 September 2025 (13:00) to Wednesday, 10 September 2025 (21:50)

Monday, 8 September 2025

13:00 Registration

13:00 - 14:00
Room: 0.056
14:00 Plenary Session: Opening Talks: Belle II, LHCb, Theory
Opening Talks: Belle II, LHCb, Theory
14:00 - 16:15
Room: 0.056
Contributions

14:00 Welcome

14:15 Belle II Status & German Involvement - Florian Bernlochner (Belle (SuperKEKB Experiment))

14:45 LHCb Upgrade - Klaas Padeken

15:15 Exclusive B decays at the precision frontier (theory) - Nico Gubernari

15:45 Precision flavour physics with inclusive penguin decays (theory) - Tobias Hurth
16:15 Coffee Break
Coffee Break
16:15 - 16:45
Room: 0.056

16:45 Social Activities: Belle II Germany Picture
Belle II Germany Picture
16:45 - 17:00
Room: U1.059

17:00 ECR: Session
Session
17:00 - 18:00
Room: 0.056
PI Meeting
17:00 - 18:00
Room: U1.059
Contributions

17:00 PXD status and plans - Fabian Becherer (BELLE (BELLE Gruppe))

17:15 PT - Maren Meinhard

17:45 Sustainability - Thomas Kuhr (LMU Munich)
18:30 Belle II Germany Dinner
Belle II Germany Dinner
18:30 - 20:30

20:30 Social Activities: Belle II Quizz + Karaoke
Belle II Quizz + Karaoke
20:30 - 22:00
Room: U1.059
Tuesday, 9 September 2025
09:00 Analysis and Theory
09:00 - 10:30
Room: 0.056
Contributions

09:00 B->K nu nu - Caspar Schmitt (Belle (SuperKEKB Experiment))

09:16 B->K nu nu reinterpretation - Lorenz Ennio Gaertner (BELLE (BELLE II Experiment))

09:32 Search for B->pi nu nu with tagging methods - Boyang Yu (BELLE (BELLE II Experiment))

09:48 Search for B+->K* tau el with hadronic tagging - Lara Fuchs (BELLE (BELLE II Experiment))

10:05 Theory talk: B meson fully hadronic decays - Marta Burgos (Maastrich)
Hardware and Upgrade
09:00 - 10:30
Room: 1.027
Contributions

09:00 PXD Status and Operation - Jannes Schmitz (University of Bonn)

09:25 Upgrade of the Belle II Vertex Detector with depleted monolithic CMOS active pixel sensors - Yannik Buch ((BELLE (BELLE II Experiment)))

09:50 GNN-ETM - Design and Deployment of a Graph Neural Network Trigger for the ECL - Isabel Haide (Karlsruhe Institute of Technology)
Software/Performance/Computing
09:00 - 10:30
Room: U1.059
Contributions

09:00 Track finding efficiency in $\mu^+ \mu^- \gamma$ Events - Lukas Grussbach (BELLE (BELLE II Experiment))

09:20 Slow pion efficiency - Melisa-Melek Akdag (BELLE (BELLE II Experiment))

09:40 Graph Neural Network based Track Finding for SVD and CDC - Tristan Brandes (Karlsruhe Institute of Technology (KIT))

10:05 Detector Alignment at Belle II - Tadeas Bilka (BELLE (BELLE Gruppe))
10:30 Coffee Break & Institutional Posters
Coffee Break & Institutional Posters
10:30 - 11:00
Room: 0.056
11:00 Analysis and Theory
11:00 - 12:30
Room: 0.056
Contributions

11:00 Dalitz analysis of B->D pi+ pi - Melisa-Melek Akdag (BELLE (BELLE II Experiment))

11:16 tau->3pi nu: integrating background contributions with neural networks in partial wave analysis - Miriam Weiskopf (Max Planck Institute for Physics)

11:32 R(D*) with inclusive tagging - Fabio Novissimo (BELLE (BELLE II Experiment))

11:48 R(D*) from 1-prong tau decays and tau polarization with hadronic tagging - Ilias Tsaklidis

12:04 Theory talk: radiative correction to B-> el nu gamma - Max Ferré (Mainz)
Hardware and Upgrade
11:00 - 12:30
Room: 1.027
Contributions

11:00 First Studies of a GNN based ECL Trigger on Versal-FPGAs for the Belle II Upgrade - Thomas Gideon Lobmaier (BELLE (BELLE II Experiment))

11:25 Upgrade of the Belle II First-Level Neural Track Trigger by Three-Dimensional Hough Finding and Deep Neural Networks on FPGAs - Simon Hiesl (BELLE (BELLE II Experiment))

11:50 Design of the OBELIX Monolithic Active Pixel Sensor for the Belle II VTX Upgrade - Alexander Walsemann (BELLE (BELLE II Experiment))
Software/Performance/Computing
11:00 - 12:30
Room: U1.059
Contributions

11:00 Advancements in Analysis-Level Particle Identification through Machine Learning Techniques at Belle II - Martin Bartl (Max Planck Institute for Physics)

11:30 Development and Testing of a Neutron Identification Algorithm for Belle II - Georgios Alexandris (BELLE (BELLE II Experiment))

11:50 Photon efficiency calibration for MC16 - Sebastiano Raiz (BELLE (BELLE II Experiment))

12:10 Low-energy efficiency studies in $\tau^-\to \pi^- \pi^0\nu_\tau$ decays - Mengchuan Du (BELLE (BELLE II Experiment))
14:00 Analysis and Theory
14:00 - 16:00
Room: 0.056
Contributions

14:00 Forward-backward asymmetry in B->X el nu - Raynette van Tonder (BELLE (BELLE II Experiment))

14:16 Differential branching fraction and angular distributions in B->Xc el nu - Rajeshwari Roy (BELLE (BELLE II Experiment))

14:32 Theory talk: B->K+a decays: which framework leads to consistent exclusion plots? - Xiyuan Gao (KIT)

14:57 Search for a new spin 0 mediator in B->K S - Luc Brandl (Karlsruhe Institute of Technology)

15:13 Search for ALPs produced via photon-fusion - Frederik Schmitt (Karlsruhe Institute of Technology (KIT))

15:29 Theory talk: Constraining B-Mesogenesis with B->pψ - Zachary Wüthrich (Siegen)
Hardware and Upgrade
14:00 - 16:00
Room: 1.027
Contributions

14:00 All-silicon detector modules for the inner pixel layers of the VTX upgrade - Andreas Ulm (BELLE (BELLE II Experiment))

14:25 PXD Emergency Shutdown Investigation - Paula Scholz (University of Bonn)

14:50 DePFET X-ray Irradiation Studies - Georgios Giakoustidis (University of Bonn)

15:15 Challenges Of Hardware-Software Co-Design Of A Graph Neural Network For The ECL Trigger - Frank Michael Baptist (BELLE (BELLE II Experiment))
Software/Performance/Computing
14:00 - 16:00
Room: U1.059
Contributions

14:00 Data production and skims - Valerio Bertacchi (University of Bonn)

14:25 SysVar: A new tool for enhancing consistency in the treatment of systematics - Agrim Aggarwal (BELLE (BELLE II Experiment)) Ilias Tsaklidis

14:50 The Belle II Document Server - David Koch (BELLE (BELLE II Experiment))

15:15 b2luigi for amplitude analysis - Godo Kurten (Max Planck Institute for Physics) Miriam Weiskopf (Max Planck Institute for Physics)
16:00 Coffee Break & Institutional Posters
Coffee Break & Institutional Posters
16:00 - 16:30
Room: 0.056
16:30 PI Meeting: PI meeting II
PI meeting II
16:30 - 18:00
Room: U1.059
Contributions

16:30 Strategie für die nächste Förderperiode (PXD, Upgrade, Software, Computing, Analysen, FSP, Theorie)

17:00 Sprecher in der nächsten Förderperiode

17:10 ECR issues

17:30 FSP - Veronika Kratzer (not set)

17:45 Next Belle II Germany meeting
Poster Session

16:30 - 18:00
Room: 0.056

19:00 ECR: Dinner
Dinner
19:00 - 21:00

PI Dinner

19:00 - 21:00
Wednesday, 10 September 2025
09:00 Plenary Session
09:00 - 10:10
Room: 0.052
Contributions

09:00 ML in Particle Physics - Nicole Hartman (Munich)

09:40 Outreach - Veronika Kratzer (not set)
10:10 FTD tour (Markus Ball)

10:10 - 10:55
Room: 0.052

11:00 Coffee break (FTD)
Coffee break (FTD)
11:00 - 11:30
Room: 0.052
11:30 Plenary Session: Summaries
Summaries
11:30 - 13:10
Room: 0.052
Contributions

11:30 ECR news - Ana Luisa Moreira de Carvalho (BELLE (BELLE Gruppe)) Lorenz Ennio Gaertner (BELLE (BELLE II Experiment))

11:50 Summary: Theory and Analysis - Ana Luisa Moreira de Carvalho (BELLE (BELLE Gruppe)) Nico Gubernari Valerio Bertacchi (University of Bonn)

12:10 Summary: Hardware and Upgrade - Christian Bespin (Universität Bonn) Isabel Haide (Karlsruhe Institute of Technology)

12:30 Summary: Software and Performance - Patrick Ecker (Karlsruhe Institute of Technology) Stefan Wallner (Max Planck Institute for Physics)

12:50 Close-out - Thomas Kuhr (LMU Munich)

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