Hadronic three-body Christmas



Boltzmannstraße 2, 85748 Garching bei München https://www.munich-iapp.de/
Boris Grube (Technische Universität München), Mikhail Mikhasenko (ORIGINS Excellence Cluster), Stephan Paul (TUM)

The aim of the workshop is to foster interpreting the experimental data on three-body hadron resonances collected recently by experiments and obtained in lattice calculations by bringing together researchers across the world working in the field of hadron spectroscopy.

Precision measurements on the three-pion interaction including the $a_1(1260)$, $\pi_1(1600)$, and $\pi(1800)$ resonances were published by the COMPASS collaboration. Its interpretation calls for an advanced theoretical approach addressing the final-state interaction.

Complimentary, studies of the interaction amplitude are required in the heavy flavor sector to move forward with understanding the nature of the exotic candidates. Double-charm tetraquark, $T_{cc}^+$ recently discovered by LHCb decays dominantly to a system of three particles where mutual interaction plays an essential role. Further amplitude analysis of this exotic state and understanding of its fundamental properties demand a combined effort of the theory and experiment.

In addition, the first-discovered exotic charmonium $\chi_{c1}(3872)$ remains the subject of heated scientific debates. A real one-particle exchange the essential component to the three-body dynamics might play an important role in the inner dynamic of the state.


Meeting format

The meeting will hold in a hybrid format.

All talks will be live-streamed per Zoom.


Meeting ID: 637 6592 8968

Passcode: 137815


Information for in-person participants

 - The latest update (15.12) on COVID regulations in Munich is here: vaccinated/recovered certificate, FFP2 masks, and digital form + quarantine for traveling from high-risk (virus variant) areas.

 - The workshop is held in the MIAPP building located in the Garching research area. It is reached from the Munich downtown by the U6 line, the last station to the North. Daily ticket (tageskarte) for zones M,1,2 (prise: 10.1EUR for 1 person to 17.9EUR for a group <6) is the optimal solution for two commits.

  - MIAPP is located in the fenced area. A valid ID needs to be shown to the guard at the entrance.

 - According to the 2G+ regulation (vaccinated or recovered, plus tested) a valid test must be presented to a responsible daily. A free testing facility is located on the campus (webpage).  Also, a number of self-tests will be available.

 - Some funds to cover expenses are available for participants who can come in person. Originals of the hotel bills, travel tickets, and the claim form need to be handed to MIAPP secretaries.

Registration form
  • Abhishek Mohapatra
  • Adam Szczepaniak
  • Alessandro Pilloni
  • Arkaitz Rodas
  • Astrid Hiller Blin
  • Bastian Kubis
  • Boris Grube
  • Cesar Fernandez-Ramirez
  • Christoph Hanhart
  • Daniel Winney
  • Dominik Stamen
  • Feng-Kun Guo
  • Florian Kaspar
  • Hakan Akdag
  • Jia-Jun Wu
  • Jibo He
  • Jorge Antonio Silva-Castro
  • Lin Dai
  • Malwin Niehus
  • Martin Bartl
  • Miguel Albaladejo
  • Mikhail Mikhasenko
  • Muhammad Naeem Anwar
  • Vadim Baru
  • Vincent Mathieu
  • Yannick Wunderlich
  • Zhen-Hua Zhang
  • Łukasz Bibrzycki
    • 9:30 AM 12:40 PM
      Light-meson physics: Understanding available data
      • 9:45 AM
        Opening 15m
        Speaker: Mikhail Mikhasenko (ORIGINS Excellence Cluster)
      • 10:00 AM
        Understanding the freed-isobar data of COMPASS 2h
        Speakers: Boris Grube (Technische Universität München), Martin Bartl (TUM)
    • 12:40 PM 2:00 PM
      Lunch break 1h 20m
    • 2:00 PM 5:30 PM
      Light-meson physics: theory developments
      • 2:30 PM
        Applications of KT: subtractions for BES and Feynman matching 1h
        Speakers: Daniel Winney, Miguel Albaladejo (IFIC)
      • 4:00 PM
        Effect of the final-state interaction: Omnes vs KT 1h
        Speakers: Dominik Stamen (HISKP, Bonn), Malwin Niehus (HISKP, Bonn)
    • 9:30 AM 12:30 PM
      Heavy-flavor sector: From lineshape analysis to microscopic nature
      • 9:30 AM
        Hadronic molecules. Application to Tcc+ 1h
        Speaker: Vadim Baru
      • 11:00 AM
        Scattering parameters and compositeness 1h
        Speaker: Alessandro Pilloni (Università di Messina)
    • 12:30 PM 2:00 PM
      Lunch break 1h 30m
    • 2:00 PM 6:30 PM
      Heavy-flavor sector: Systematic approaches
    • 7:00 PM 7:15 PM
      Heavy-flavor sector: Github pipelines for reproducibility of experimental fits
      Convener: Mikhail Mikhasenko (ORIGINS Excellence Cluster)
    • 7:15 PM 10:00 PM
      Workshop dinner 2h 45m Zum Franziskaner

      Zum Franziskaner

      Residenzstraße 9, 80333 München
    • 9:30 AM 1:15 PM
      Heavy-flavor sector: Analysis of three-body resonances
      • 9:30 AM
        One-pion exchange process for Tcc+ 1h
        Speaker: Mikhail Mikhasenko (ORIGINS Excellence Cluster)
      • 11:00 AM
        Freed-isobar analysis of Deck 1h
        Speakers: Dmitry Ryabchikov (Institute for High Energy Physics), Florian Kaspar (TUM E18)
      • 12:00 PM
        Closing 15m
        Speaker: Mikhail Mikhasenko (ORIGINS Excellence Cluster)
    • 3:00 PM 7:00 PM
      JPAC: Collaboration meeting