2024 Belle II Physics Week

Asia/Tokyo
Kobayashi Hall (KEK)

Kobayashi Hall

KEK

James Frederick Libby (BELLE (BELLE II Experiment)), Karim Trabelsi (TYL - KEK), Kenji Inami (Nagoya), Laura Zani (INFN of Roma Tre), Torben Ferber (Karlsruhe Institute of Technology (KIT))
Description


(more pictures can be found here)

 

The 2024 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 second 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 tau and dark sector 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 these fundamental sectors 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. 

 

Note that Wednesday evening we will have a poster session where Belle II students can present their work (analysis or else).

 

 Previous edition of physics week in 2023 was on Vcb determination.

 

Confirmed speakers include: Marco Ardu, Anke Biekoetter, Adrian Casais Vidal, Lorenzo Calibbi, Pablo Roig Garcés, Stefania Gori, Martin Hoferichter, Nazila Mahmoudi, Giordon Stark, Olcyr Sumensari, Jure Zupan, Gilly Elor, Tobioka Kohsaku, Robert McGehee, Tomasz Procter, Lorenz Gaertner

 

Organization committee: T.Ferber, L.Zani, K.Inami, E.Passemar, M.Endo, G.Z.Krnkaic, S. Hashimoto, J.Libby, K. Trabelsi.

 

- This event is supported by TYL, KMI and KEK/LBNL 

 

 - 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 15th. Participation is warmly recommended.

 

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

Participants
  • Adrian Casais Vidal
  • Agrim Aggarwal
  • Akane Maeda
  • Akimasa Ishikawa
  • Alan Schwartz
  • Alessandro Gaz
  • Alexandre Beaubien
  • Andre Hao Yuan Huang
  • Andreas Warburton
  • Andrej Lozar
  • Andrzej Bozek
  • Anke Biekoetter
  • Anthony Craig Little
  • Arkodip Biswas
  • Aurelien Martens
  • Bianca Scavino
  • ByungGu Cheon
  • Carlos Marinas
  • Cecilia Antonioli
  • Changzheng Yuan
  • Chanho KIM
  • Cheolhun Kim
  • Chia-Ling Hsu
  • Christopher Hearty
  • Daniel Greenwald
  • Daniel Weston Mckay Crook
  • Dmytro Meleshko
  • Emi Kou
  • Emilie Passemar
  • enrico graziani
  • Fabian Becherer
  • Farah Mawas
  • Federico Testa
  • Flavien Callet
  • Foteini Trantou
  • Gaetano de Marino
  • Giacomo De Pietro
  • Giampiero Mancinelli
  • Gilly Elor
  • Giordon Stark
  • Giovanni Gaudino
  • Gordan Krnjaic
  • HanEol Cho
  • Hirotaka Sugawara
  • Hobin Lee
  • Hyuna Kim
  • Ijeong Na
  • Isaac Consigny
  • Isabelle Ostrowski
  • Jaeyoung Kim
  • James Frederick Libby
  • Jaroslaw Wiechczynski
  • Johan Andres Colorado
  • Jonas Eppelt
  • Junaid Ur Rehman
  • Junli Ma
  • Jure Zupan
  • Justin Skorupa
  • Kairui Huang
  • Karim Trabelsi
  • Kazutaka SUMISAWA
  • Kei Yamamoto
  • Kenji Inami
  • Kevin Varvell
  • Kodai Matsuoka
  • Kohsaku Tobioka
  • Komori Ryotaro
  • Kristof Spenko
  • Kylian DEMORY
  • Laura Salutari
  • Lea Reuter
  • Lorenz Ennio Gaertner
  • Lorenzo Calibbi
  • Ludovico Massaccesi
  • Luigi Corona
  • Marcela Garcia
  • Marcella Bona
  • Marco Ardu
  • Mario Merola
  • Marko Staric
  • Markus Prim
  • Martin Bartl
  • Martin Hoferichter
  • Martina Laurenza
  • Matthaeus Krein
  • Matthew Barrett
  • Mattia Bruno
  • Mattia Marfoli
  • Melisa-Melek Akdag
  • Michel Bertemes
  • Michel Hernandez Villanueva
  • Michele Aversano
  • Michele Veronesi
  • Miho Wakai
  • Mihoko Nojiri
  • Mikihiko Nakao
  • Mikihiko Nakao
  • Minakshi Nayak
  • Motoi ENDO
  • MyeongJae Lee
  • Nanae Taniguchi
  • Nazila Mahmoudi
  • Noah Brenny
  • Olcyr Sumensari
  • Pablo Roig
  • Peter Krizan
  • Rajesh Kumar Maiti
  • Riccardo Manfredi
  • Robert McGehee
  • Roberta Volpe
  • Robin Leboucher
  • Roman Mizuk
  • Samantha Taylor
  • Sayan Mitra
  • Seokhee Park
  • Sergei Zakharov
  • Shohei Nishida
  • Shoji Hashimoto
  • Simone Cuccuini
  • Slavomira Stefkova
  • Soeren Prell
  • Sourav Patra
  • Stefan Wallner
  • Stefania Gori
  • Suchismita Sahoo
  • Swagato Banerjee
  • Tadeas Bilka
  • Takashi Kaneko
  • Tetsuo Shindou
  • Thomas BROWDER
  • Thomas Mueller
  • Tomasz Procter
  • Tommy Lam
  • Tomoyuki Shimasaki
  • Torben Ferber
  • Toru Iijima
  • Tristan Fillinger
  • Valerio Bertacchi
  • Vidya Sagar Vobbilisetti
  • Vikas RajG
  • Vismaya V S
  • Vitalii Lisovskyi
  • Wemin Song
  • Xiantao Hou
  • Xiaodong Shi
  • Yasuhiro Okada
  • Yu Nakazawa
  • Yulan Fan
  • Yuta Takinami
  • Yutaka Ushiroda
  • Zepeng Xu
  • Zhiqing Zhang
  • Zihan Wang
  • Zuzana Gruberova
    • 9:00 AM 12:30 PM
      School
      • 9:00 AM
        Theory introduction to the dark sector 1h
        Speaker: Prof. Stefania Gori (UCSC)
      • 10:00 AM
        tau analyses 101 1h
        Speaker: Soeren Prell (Iowa State University)
      • 11:00 AM
        Coffee 30m
      • 11:30 AM
        Event generators for low multiplicity and tau 1h
        Speaker: Swagato Banerjee (University of Louisville (U.S.))
    • 1:25 PM 6:55 PM
      Workshop on taus and dark sectors
      Conveners: Emilie Passemar (Indiana), Laura Zani (INFN of Roma Tre), Torben Ferber (Karlsruhe Institute of Technology (KIT))
      • 1:25 PM
        Opportunities for testing the Standard Model with Tau leptonic decays at Belle II 30m

        Speaker: Pablo Roig

        Speaker: Pablo Roig Garcés ((CINVESTAV))
      • 2:05 PM
        LFV in tau decays and possibility for new mediators: complementarity of tau and muon 30m

        Speaker: Lorenzo Calibbi

        Speaker: Lorenzo Calibbi ((Nankai U.))
      • 2:45 PM
        Mesogenesis: Signals of Baryogenesis at B-Factories 30m

        Mesogenesis is a testable mechanism for generating both the matter-antimatter (baryon) asymmetry and the dark matter of the Universe. Mesogenesis leverages the CP violation within charged or neutral Standard Model meson systems; in one version of the mechanism the entire baryon asymmetry can be generated with only the Standard Model contributions to the CP violation. After giving an overview of the existing variations of Mesogenesis (and their respective signals), I will summarize specific searches that can be conducted by Belle to discover Mesogenesis. The Belle collaboration has already set a limit on the branching fraction for a neutral B meson decaying into Lambda baryon and missing energy, which constrains one channel through which Neutral B-Mesogenesis can proceed. I will discuss the implications of this search for the entire parameter space of Mesogenesis mechanisms, and further motivate other Mesogenesis searches that Belle is uniquely equipped for. While B-factories truly are the ideal environment to discover Mesogenesis, a variety of indirect signals exist at hadron colliders, neutrino experiments, and through astrophysical observations. I will conclude by presenting an overview of the various complementary experimental searches that can be conducted. Such an experimental program has the potential to fully prope the model space of this mechanism.

        Speaker: Gilly Elor (U. Texas)
      • 3:25 PM
        Coffee break 30m
      • 3:55 PM
        Dark sector search with hadrons 30m
        Speaker: Tobioka Kohsaku (U. Florida)
      • 4:35 PM
        Prospects on the magnetic(electric) moment of the tau and polarized beams 30m

        Speaker: Martin Hofenrichter

        Speaker: Martin Hoferichter ((Bern U.))
    • 9:00 AM 12:30 PM
      School
    • 1:30 PM 6:00 PM
      Workshop on taus and dark sectors
      Conveners: Emilie Passemar (Indiana), Laura Zani (INFN of Roma Tre), Torben Ferber (Karlsruhe Institute of Technology (KIT))
      • 1:30 PM
        State of the art statistics: pyhf 30m
        Speaker: Giordon Stark
      • 2:10 PM
        Challenging BSM search with taus 30m

        Speaker: Jure Zupan

        Speaker: Jure Zupan (Cincinnati)
      • 2:50 PM
        Dark Matter, Baryogenesis, & Naturalness at Belle II 30m

        Belle II is sensitive to O(GeV) visibly-decaying dark photons which kinetically mix with the Standard Model photon (ie through the vector portal). Interestingly, there are a number of motivated, non-vanilla BSM models which all point to the masses and couplings that are imminently detectable there. We’ll cover a range of such scenarios with broad theoretical motivations such as self-interacting dark matter, asymmetric dark matter & baryogengesis, and models of neutral naturalness.

        Speaker: Robert McGehee (U. Minnesota)
      • 3:30 PM
        Coffee break 30m
      • 4:00 PM
        Lepton Flavour Violation at Belle II 30m

        Speaker: Marco Ardu

        Speaker: Marco Ardu (( Valencia U., IFIC))
      • 4:40 PM
        Efficient reinterpretation with model agnostic likelihoods 30m
        Speaker: Lorenz Ennio Gaertner (BELLE (BELLE II Experiment))
      • 5:20 PM
        Global view on DS searches 30m

        Effective field theory (EFT) provides a model-agnostic way to describe new physics and, in particular, dark sectors. In this talk, we will discuss how and where Belle II contributes crucial constraints on effective theories with light new (pseudo-) scalars. When analyzing the effects of these new physics theories, it is important to take into account all their possible interactions. We will discuss how global analyses of the couplings of new particles provide useful insights into the allowed parameter space and pinpoint yet untested regions.

        Speaker: Anke Biekoetter (U. Mainz)
    • 6:00 PM 7:30 PM
      Poster session (sake and otsumami)
    • 9:00 AM 12:30 PM
      School
    • 1:25 PM 5:00 PM
      Workshop on taus and dark sectors
      Conveners: Emilie Passemar (Indiana), Laura Zani (INFN of Roma Tre), Torben Ferber (Karlsruhe Institute of Technology (KIT))
      • 1:30 PM
        Testing SM through precise measurements - summary and panel discussion 30m
        Speaker: Emilie Passemar (Indiana)
      • 2:10 PM
        non-vanilla dark sector- summary and panel discussion 30m
        Speaker: Gordan Krnjaic
      • 2:50 PM
        Coffee break 30m
      • 3:20 PM
        Beyond SM searches with taus -summary and panel discussion 30m
        Speaker: Olcyr Sumensari (IJCLab)
      • 4:00 PM
        Statistical analysis, interpretation and recasting - summary and panel discussion 30m
        Speaker: Torben Ferber (Karlsruhe Institute of Technology)
    • 5:00 PM 6:30 PM
      pyhf-tutorial

      Repository: https://github.com/lorenzennio/pyhf-tutorial/tree/belle2-physics-week

      Format: allow everyone to clone the repo and execute as we go

      Conveners: Slavomira Stefkova (KIT), Torben Ferber (Karlsruhe Institute of Technology)
      • 5:00 PM
        Pyhf. (setup, simple model, fit) 30m
        Speaker: Giordon Stark
      • 5:30 PM
        Frequentist inference: CLs limit setting with pyhf 30m
        Speaker: Slavomira Stefkova (KIT)
      • 6:00 PM
        Bayesian inference with pyhf 30m
        Speaker: Lorenz Ennio Gaertner (BELLE (BELLE II Experiment))
    • 6:30 PM 7:30 PM
      Belle II Tour