2023 Belle II Physics Week

Asia/Tokyo
Kobayashi Hall (KEK)

Kobayashi Hall

KEK

James Frederick Libby (BELLE (BELLE II Experiment)), Mirco Dorigo (INFN Trieste)
Description

The 2023 Belle II Physics Week will be in-person gathering intended to foster open discussion among Belle II experimentalists and theory experts. 

 

All collaborators are invited to join KEK for in-person attendance. 

 

The week will consist of two parts: 

 

- Mornings: a school for PhD students and early postdocs with general pedagogical lectures about aspects of Belle II and flavour physics. It will include plenary sessions on phenomenology, detectors, and benchmark analyses along with in-person hands-on work. Plenary lectures will be recorded. In-person hands-on will be conducted on-site. Online participation will be also possible.

 

 - Afternoons: a workshop, this is the first in a series of workshops focusing on special topics at the interface of theory and experiment that are priorities for the Belle II program. 

 

This year the workshop is on precision |Vcb| measurements at Belle II. 

 

We’d like to openly take on challenges, issues and opportunities at Belle II to generate a program of prioritised measurements/studies to advance the knowledge of this fundamental parameter in the next 3 years. 

 

A generous amount of discussion time is allotted to each talk in the program, which also includes extensive break out sessions.

In this spirit, participation to the workshop is intended to be only in person to maximize the interactions and discussion.

 

The workshop's discussions and conclusions will be documented in a short KEK report. 

 

Organization committee: L. Cao, M. Dorigo, S. Hashimoto, T. Iijima, T. Kaneko, J. Libby, R. Mandal, D. Robinson, D. Tonelli, K. Trabelsi.

 

Confirmed speakers include: Luiz Vale Silva, Bob Kowalewski, Zoltan Ligeti, Markus Prim, Alejandro Vaquero, Florian Bernlochner, Jim Libby, Daniel Dorner, Kenta Uno, Matteo Fael, Judd Harrison, Marco Fedele, Marzia Bordone, Lu Cao, Lopamudra Mukherjee, Phill Urquijo, Keri Vos, Michele Papucci, Paolo Gambino. 

 

 - The registration fee will be 8,000 JPY covering coffee breaks and a social dinner on Tuesday. For those who does not join the social dinner, a reduced registration fee of 2,500 JPY will be applied. An invoice from PayPal will be sent to registrants' email address, according to the information given at the registration.

 

- There will be a social dinner on Tuesday, October 31st. Participation is warmly recommended.

 

Further details about logistics can be found in 'Transportation' and 'Accommodation' sections on the left menu. 
 

Participants
  • Alejandro Vaquero Avilés-Casco
  • Alessandro Gaz
  • Aman Pavan Salikar
  • Andre Hao Yuan Huang
  • Anja Novosel
  • Anthony Craig Little
  • Bruce Yabsley
  • Cameron Cooper Harris
  • Carlos Lizama
  • Carlos Marinas
  • Cheolhun Kim
  • Chia-Ling Hsu
  • Claudia Cecchi
  • Clotilde Lemettais
  • Corentin Santos
  • CRISTIAN FELIPE SIERRA FONSECA
  • Daichi Ide
  • Daniel Dorner
  • Daniel Greenwald
  • Daniel Marcantonio
  • Dean Robinson
  • Debjit Ghosh
  • Dey sdey Sourav
  • Diego Tonelli
  • Dmytro Meleshko
  • Eunji Jang
  • Farah Mawas
  • Felix Keil
  • Felix Metzner
  • Florian Bernlochner
  • Foteini Trantou
  • Gaetano de Marino
  • Giacomo De Pietro
  • Giovanni Gaudino
  • HanEol Cho
  • Hanwook Bae
  • Hazaravard Ghumaryan
  • Horacio Crotte Ledesma
  • Iijima Toru
  • Isabelle Ripp-Baudot
  • James Frederick Libby
  • Jaroslaw Wiechczynski
  • Jerome Baudot
  • Jihun An
  • Johan Andres Colorado
  • Jordan Correa
  • Judd Harrison
  • Justin Skorupa
  • Karim Trabelsi
  • Karol Adamczyk
  • Katsuro Nakamura
  • Kenta Uno
  • Kevin Varvell
  • Kimberley Keri Vos
  • Kodai Matsuoka
  • Koji Hara
  • Kookhyun Kang
  • Longke Li
  • Lopamudra Mukherjee
  • Lu Cao
  • Ludovico Massaccesi
  • Luiz Vale Silva
  • Marcel Hohmann
  • Marcela Garcia
  • Marco Fedele
  • Mario Merola
  • Markus Prim
  • Martin Sobotzik
  • Marzia Bordone
  • Mateusz Kaleta
  • Matteo Fael
  • Meihong Liu
  • Michel Bertemes
  • Michele Aversano
  • Michele Mantovano
  • Michele Papucci
  • Michele Veronesi
  • Mikihiko Nakao
  • Mirco Dorigo
  • Murad Yasaveev
  • Naveen Baghel
  • Niharika Rout
  • Noah Brenny
  • Paolo Gambino
  • Patrick Owen
  • Paul Feichtinger
  • Philipp Horak
  • Priyanka Cheema
  • Quinn Campagna
  • Renu Garg
  • Riccardo Manfredi
  • Robert Kowalewski
  • Rusa Mandal
  • Sayan Mitra
  • Sebastiano Raiz
  • Seokhee Park
  • Shanette Anne De La Motte
  • Shigemi Ohta
  • Shohei Nishida
  • Shoji Hashimoto
  • Soeren Prell
  • Stefan Wallner
  • Stefano Lacaprara
  • Stefano Moneta
  • Steven Robertson
  • Tadeas Bilka
  • Takashi Kaneko
  • Thomas Browder
  • Tommy Lam
  • Tristan Fillinger
  • Umberto Tamponi
  • Valerio Bertacchi
  • Vismaya V S
  • Volodymyr Aushev
  • Xiaodong Shi
  • Xinyu Shan
  • Yifan Jin
  • Yo Sato
  • YongHeon Ahn
  • Yoshiyuki Onuki
  • Yu Nakazawa
  • Yubo Han
  • Zoltan Ligeti
    • School Kobayashi Hall

      Kobayashi Hall

      KEK

    • Workshop: Introduction Kobayashi Hall

      Kobayashi Hall

      KEK

    • Workshop: Vcb exclusive Kobayashi Hall

      Kobayashi Hall

      KEK

      Convener: Dean Robinson (BNL)
      • 6
        Experimental challenges in exclusive measurements

        Review recent measurements with focus on current limitations: are we already systematically limited? how to circumvent this?
 Is there a Vcb dependence on parametrisation (recent measurements do not indicate so)? Dependence on truncation on BGL expansion, how to choose (eg. nested hypothesis tests)? New ideas, eg down-feed D* in D categories to measure the w spectrum

        Speaker: Robert Kowalewski (University of Victoria)
      • 7
        Theoretical challenges in the exclusive determinations

        Developments in FF model independent approaches. How to assess potential biases from various models or sum rule-based approaches? 
How do we systematically decide on the truncation order of a parametrization (Akaike IC, Nested Hyp. test, …). Can we develop a benchmark test to compare different methods? 
For HQET-based parametrizations of B -> D/D*, how do we assess the role of and incorporate second-order power corrections?

        Speaker: Zoltan Ligeti (Berkley)
    • 16:15
      Coffee break Kobayashi Hall

      Kobayashi Hall

      KEK

    • Workshop: Vcb exclusive Kobayashi Hall

      Kobayashi Hall

      KEK

      Convener: Takashi Kaneko (KEK)
      • 8
        Beyond unfolded distributions

        Which measurements can we provide to improve knowledge on form factors? What are the shortcomings of unfolded distributions? 
What can we provide beyond/along-with them? 
What can angular analyses add?

        Speaker: Markus Prim (BELLE (BELLE II Experiment))
      • 9
        Lattice tensions

        What are the tension: review/comparison of recent calculations by Fermilab/MILC,HPQCD,JLQCD. 
What are the key differences among the 3 calculations and possible origin of the tension? 
What's needed to identify the origin of the tension: what short-term future results/calculations are planned?

        Speaker: Alejandro Vaquero (UNIZAR)
    • School Kobayashi Hall

      Kobayashi Hall

      KEK

    • How to use our SW and DP tools R244 (4-Go-Kan)

      R244

      4-Go-Kan

      Hands on session

      Conveners: Frank Meier (Duke University), Giacomo De Pietro (Karlsruhe Institute of Technology), Dr Stefano Lacaprara (INFN Padova), Umberto Tamponi (INFN - Torino)
    • Workshop: Vcb exclusive Kobayashi Hall

      Kobayashi Hall

      KEK

      Convener: Lu Cao (BELLE (BELLE Gruppe))
      • 13
        FF, polarisation and asymmetries in D*lnu

        Discuss https://arxiv.org/abs/2305.15457 and DM

        Speaker: Marco Fedele (KIT)
    • Workshop: SL gap and inputs from other sectors Kobayashi Hall

      Kobayashi Hall

      KEK

      Convener: Lu Cao (BELLE (BELLE Gruppe))
      • 14
        SL gap: knowns and unknowns

        What is the current knowledge of D(*)(n)pi l nu decays?
 What do we do to fill the gap? Are our assumptions and uncertainties 
(not only for Vcb) reliable? 
Can we do better and what recent measurements brought?

        Speaker: Florian Bernlochner (Belle (SuperKEKB Experiment))
      • 15
        Can B hadronic help?

        Can hadronic B decays (eg. B->D*eta pi) supplement info on SL-gap modes? Under which assumptions/limitations? Would like to stimulate a discussion on what measurements are possible and pressing on Bhad

        Speaker: Mirco Dorigo (INFN Trieste)
      • 16
        Inputs from Charm

        This talk will explore the successful endeavors of the BES-III experiment in simulating the decay processes of charmed mesons. Advanced decay models for multibody charm decays based on dedicated partial wave amplitude measurements will be introduced.

        Speaker: Xinyu Shan (USTC)
    • 16:15
      Coffee break Kobayashi Hall

      Kobayashi Hall

      KEK

    • Workshop: experimental challenges Kobayashi Hall

      Kobayashi Hall

      KEK

      Convener: Mirco Dorigo (INFN Trieste)
      • 17
        Ways to improve f+-/f00

        To overcome the current used value affected by large isospin-breaking uncertainty, and to account for any c.m.-energy dependence

        Speaker: James Frederick Libby (BELLE (BELLE II Experiment))
      • 18
        Slow-pion efficiency

        The slow-pion efficiency and its associated systematic uncertainty is currently the major limitation of the exclusive measurement with B->D*(D0 pi_s) l nu decays. Can we improve the slow-pion efficiency? Can we reduce its systematic uncertainty?

        Speaker: Daniel Dorner (BELLE (BELLE II Experiment))
      • 19
        Lepton ID challenges

        A key ingredient of SL measurements are LID efficiencies, their corrections and systematic uncertainties. The talk review on this topic with particular focus on current limitations and modelling of LID uncertainty correlations.

        Speaker: Kenta Uno (KEK)
    • Party Kobayashi Hall

      Kobayashi Hall

      KEK

    • School Kobayashi Hall

      Kobayashi Hall

      KEK

      • 20
        Flavour physics 3
        Speaker: Dr Rusa Mandal (IIT Gandhinagar)
      • 21
        FEI: from top-to-bottom
        Speaker: Niharika Rout (INFN Trieste)
      • 11:00
        Coffee
      • 22
        Belle + Belle II analyses: a how to guide?
        Speaker: Xiaodong Shi (BELLE (BELLE II Experiment))
    • Setting up the KEK report Room 3 Ground Floor, Kenkyu Honken Building (same of Kobayashi Hall)

      Room 3 Ground Floor, Kenkyu Honken Building (same of Kobayashi Hall)

      KEK

    • Workshop: Vcb inclusive Kobayashi Hall

      Kobayashi Hall

      KEK

      Convener: Rusa Mandal (IITGN)
      • 23
        Experimental developments of inclusive inputs

        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.).

        Speaker: Lu Cao (BELLE (BELLE Gruppe))
      • 24
        Vub/Vcb inclusive measurement

        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)

        Speakers: Marcel Hohmann (BELLE (BELLE II Experiment)), Dr Phillip Urquijo (The University of Melbourne)
      • 25
        Vub/Vcb from lattice

        Lattice calculation of relevant form factors and future prospects

        Speaker: Judd Harrison (Glasgow)
      • 26
        Theory progress for Vcb inclusive

        |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?

        Speaker: Keri Vos
    • 16:15
      Coffee break Kobayashi Hall

      Kobayashi Hall

      KEK

    • Workshop discussion: Break out Kobayashi Hall

      Kobayashi Hall

      KEK

      Conveners: Florian Bernlochner (Belle (SuperKEKB Experiment)), Paolo Gambino (Torino)
    • Poster session (sake and otsumami) Kobayashi Hall

      Kobayashi Hall

      KEK

    • School Kobayashi Hall

      Kobayashi Hall

      KEK

    • Workshop: Vcb inclusive Kobayashi Hall

      Kobayashi Hall

      KEK

      Convener: Lu Cao (BELLE (BELLE Gruppe))
      • 31
        Loops in inclusive determination
        Speaker: Matteo Fael (CERN)
      • 32
        Challenges for a global inclusive analysis

        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

        Speaker: Marzia Bordone (CERN)
    • Tools Kobayashi Hall

      Kobayashi Hall

      KEK

      Convener: Lu Cao (BELLE (BELLE Gruppe))
      • 33
        HAMMER and eFFORT

        Discuss any recent ore foreseen developments and needs from analyst (can also collect inputs in advance from Belle 2 people if needed)

        Speaker: Michele Papucci (CALTECH)
      • 34
        New EvtGen models for D*lnu

        Discuss https://arxiv.org/abs/2203.07189

        Speaker: Lopamudra Mukherjee
    • 16:15
      Coffee break Kobayashi Hall

      Kobayashi Hall

      KEK

    • Workshop discussion: Vcb combinations Kobayashi Hall

      Kobayashi Hall

      KEK

      Convener: James Frederick Libby (BELLE (BELLE II Experiment))
    • Workshop: Prospects and closing Kobayashi Hall

      Kobayashi Hall

      KEK

      Convener: James Frederick Libby (BELLE (BELLE II Experiment))
      • 36
        Vcb in 3 years and beyond

        Prospecst for Vcb and what we would like to have in 3 years (possibly taking also inputs from the discussion during the workshop)

        Speaker: Paolo Gambino (Torino)
      • 37
        Closing
        Speaker: Karim Trabelsi (IJCLab (Orsay))