Experimental and theoretical status of and perspectives for XYZ states

Name: Experimental and theoretical status of and perspectives for XYZ states
Start: 2021-04-12T09:00:00+02:00
End: 2021-04-15T18:00:00+02:00
Location: No location set

12 Apr 2021, 09:00 → 15 Apr 2021, 18:00 Europe/Berlin

online

Zoom Meeting ID: 918 4422 7439

Frank Nerling (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) , Christoph Hanhart (FZ Jülich)

Description

While a majority of the community agrees that the XYZ states have a non-q̄q nature, the internal structure of these states is not yet understood. To deepen our understanding in this field, additional experimental and theoretical studies are needed. For example, complete spin multiplets should be studied; to distinguish true resonance signals from kinematic effects, the confirmation of states in different experiments is needed; resonance shape measurements are compulsory to access the long ranged parts of the exotic wave functions.
At present most experimental information comes from Belle (II) (Japan), BESIII (China) and LHCb (CERN). The gluon-rich process of pp̄ annihilation as it will be available for the upcoming PANDA experiment at the FAIR facility (Germany) promises new and complementary insights. The workshop focusses on the status and future perspectives in the field of exotic hadrons in the heavy quarkonium mass region.

Confirmed invited speakers:

Experiment	Talk (title)
Peter Braun-Munzinger	"ALICE results on XYZ"
Sean Dobbs	"Study charmonia and hybrids with GlueX"
Simon Eidelmann	"Future relevant experiments"
Alexey Guskov	"COMPASS results on XYZ states"
Zhiqing Liu	"BESIII results on X and Z states"
Roman Mizuk	"Belle(II) XYZ results in the B sector"
Sebastian Neubert	"LHCb results on exotic charmonia"
Marco Pappagallo	"LHCb results on (ordinary) charmonia and bottomonia"
Cheng-Ping Shen	"Belle(II) XYZ results in the charm sector"
Chengzeng Yuan	"BESIII results on vector Y states"

Theory	Talk (title)
Eric Braaten	"Production of X(3872)"
Nora Brambilla	"Effective field theories for regular quarkonia and exotics"
Feng-Kun Guo	"Triangle Singularities"
Luciano Maiani	"Tetraquarks"
Ulf-G. Meißner	"Hadronic Molecules"
Alessandro Pilloni	"Production of X(3872)"
Sinead Ryan	"Lattice QCD in the doubly heavy sector"
Marc Vanderhaegen	"Inclusion of pi pi interactions in heavy meson decays"

Participants

Abdennacer Hamdi
Abhishek Mohapatra
Achim Denig
Adam Szczepaniak
Aiqiang Guo
Alessandro Pilloni
Alexander Bondar
Alexander Zinchenko
Alexey Guskov
Alexey Nefediev
Alfons Khoukaz
Ali Yilmaz
Amine Chabane
Anastasios Belias
Andrea Dubla
Atsushi Hosaka
Benjamin Dönigus
Bryan Fulsom
Carlo Ewerz
Carolin Riehl
Changzheng Yuan
Chengping Shen
Christian Fischer
Christoph Hanhart
Christopher Thomas
Chunhua Li
Claude Amsler
Daniel Mohler
Eric Braaten
Eric Swanson
Evelina Gersabeck
Feng-Kun Guo
Francesco Knechtli
Frank Nerling
Haluk Denizli
Igor Danilkin
Inti Lehmann
Jacek Biernat
Jaume Tarrús
Jiaxing Zhao
Jibo He
Jinfeng Liao
Johan Messchendorp
Jonas Rademacker
Jonathan Rosner
Joshua Hoffer
Jun Jiang
Junhao Yin
Kai Zhu
Kai-Thomas Brinkmann
Kirill Chilikin
Klaus Götzen
Klaus Peters
Lars Schmitt
Lasse Mueller
Laura Tolos
Leon von Detten
Leopoldo Abranches
Li-Sheng Geng
Liping He
luciano maiani
Lukas Chlad
Luke Gayer
Makoto Takizawa
Marc Pelizaeus
Marc Wagner
Marcelo Munhoz
Marco Pappagallo
Marek Karliner
Markus Moritz
Martin Pflaumer
Matt Durham
Max Lellmann
Michael Eichberg
Miguel Albaladejo
Mikhail Barabanov
Muhammad Naeem Anwar
Nico Santowsky
Nilmani Mathur
Nora Brambilla
Paolo Giubellino
Paul Lebrun
Pavel Oskin
Peter Braun-Munzinger
Qian Wang
Ralf Averbeck
Ralf Kliemt
Robert Jaffe
Robert Pisarski
Roberto Mussa
Roman Mizuk
Rong-Gang Ping
Ruslan Chistov
Sachiko Takeuchi
Salman Malik
Sasa Prelovsek
Sean Dobbs
Sebastian Neubert
Shanette De La Motte
Shuxian Du
Simon Eidelman
Sinéad Ryan
Steve Godfrey
Sven Peter
Tariq Mahmoud
Tim Gershon
Tom Reichert
Udo Kurilla
Udo Kurilla Test
Ulf-G. Meißner
Ulrich Wiedner
Umberto Tamponi
Umut Keskin
Vadim Baru
Vladimir Galkin
Weimin Song
Wolfgang Kühn
Xiaoyun Wang
Xiu-Lei Ren
Yan Wang
Yaroslav Kulii
Yasuhiro Yamaguchi
Ying-Chao Xu
Yuping GUO
Zehua Xu
Zehua Xu
Zhiqing Liu
Zhiyong Wang
Áron Kripkó

Support Contact

XYZ-Workshop@gsi.de

Monday, 12 April
- 09:00 → 10:25
  xyz: session 1
  - 09:00
    
    Opening 5m
    
    Speaker: Frank Nerling (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI))
    
    XYZ-Workshop-Welcome_20210412.pdf
  - 09:05
    
    BESIII results on vector Y states 40m
    
    Speaker: Changzheng Yuan (IHEP Beijing)
    
    2021_Vectors-GSI-YuanCZ.pdf
    
    Changzheng_Yuan_12_Apr_21.mp4
  - 09:45
    
    BESIII results on X, Z states 40m
    
    Speaker: Zhiqing Liu (Shandong University)
    
    Zhiqing_Liu_12_Apr_21.mp4
    
    ZhiqingLiu_review_X&Z_v2.pdf
- 10:25 → 10:45
  
  Coffeebreak 20m
- 10:45 → 12:00
  xyz: session 2
  - 10:45
    
    Dissecting XYZ-states with functional methods 25m
    
    Speaker: Christian Fischer (JLU Giessen)
    
    Christian_Fischer_12_Apr_21.mp4
    
    Fischer_exotichadrons.pdf
  - 11:10
    
    Test of the nature of $P_{cs}(4459)$ as a hadronic molecule in the $\Xi_b^-\to J/\psi \Lambda K^-$ decay 25m
    
    Speaker: Li-Sheng Geng (Beihang University)
    
    Li-Sheng_Geng_12_Apr_21.mp4
  - 11:35
    
    X(3872) in the hybrid model of charmonium and hadronic molecule 25m
    
    Speaker: Yasuhiro Yamaguchi (Japan Atomic Energy Agency)
    
    X_Yamaguchi.pdf
    
    Yasuhiro_Yamaguchi_12_Apr_21.mp4
- 12:00 → 14:00
  
  Lunchbreak 2h
- 14:00 → 15:20
  xyz: session 3
  - 14:00
    
    Effective field theories for regular quarkonia and exotics 40m
    
    Speaker: Nora Brambilla (TUM)
    
    GSI2021Brambilla.pdf
    
    Nora_Brambilla_12_Apr_21.mp4
  - 14:40
    
    Hadronic Molecules 40m
    
    Speaker: Ulf-G. Meißner (Univ. Bonn/FZ Jülich)
    
    HadronicMolecules_Meissner.pdf
    
    Ulf-G_Meissner_12_Apr_21.mp4
- 15:20 → 15:40
  
  Coffeebreak 20m
- 15:40 → 16:55
  xyz: session 4
  - 15:40
    
    Nonrelativistic effective field theories for exotic heavy hadrons 25m
    
    Speaker: Jaume Tarrús (IFAE)
    
    Jaume_Tarrus_12_Apr_21.mp4
    
    talk_XYZ21_tarrus.pdf
  - 16:05
    
    Heavy fourquarks and dibaryon states 25m
    
    Speaker: Nilmani Mathur (Tata Institute of Fundamental Research)
    
    Mathur_xyzlattice.pdf
    
    Nilmani_Mathur_12_Apr_21.mp4
  - 16:30
    
    On history of the bottomonium-like states Z_b discovery (In Memoriam Misha Voloshin) 25m
    
    Speaker: Alex Bondar (Budker Institute, Novosibirsk )
    
    A.Bondar_Mem_Misha.pptx
    
    Alex_Bondar_12_Apr_21.mp4
Tuesday, 13 April
- 09:00 → 10:20
  xyz: session 5
  - 09:00
    
    Belle(II) results in the charm sector 40m
    
    Speaker: Chengping Shen (Fudan University)
    
    Chengping_Shen_13_Apr_21.mov
    
    shen.pdf
  - 09:40
    
    Belle(II) XYZ results in the B sector 40m
    
    Speaker: Kirill Chilikin (Lebedev Physical Institute of the Russian Academy of Sciences)
    
    belle2_xyz_b_mesons.pdf
    
    Kirill_Chilikin_13_Apr_21.mp4
- 10:20 → 10:40
  
  Coffeebreak 20m
- 10:40 → 12:05
  xyz: session 6
  - 10:40
    
    Coupled-channel interpretation of the LHCb double-J/psi spectrum 25m
    
    Speaker: Alexey Nefediev (Lebedev Physics Institute)
    
    Alexey_Nefediev_13_Apr_21.mp4
    
    nefediev-xyz2021.pdf
  - 11:05
    
    X0(2900) in the molecular picture 25m
    
    Speaker: Qian Wang (South China Normal University)
    
    Qian_Wang_13_Apr_21.mp4
    
    QianWang_X02900.pdf
  - 11:30
    
    Production of 1++ states in e+e- collision 25m
    
    Speaker: Yuping Guo (Fudan University)
    
    2021Apr13-EMMI-Production1++States-YPGUO.pdf
    
    Yuping_Guo_13_Apr_21.mp4
  - 11:55
    
    ExtreMe Matter Institute EMMI 10m
    
    Speaker: Carlo Ewerz (EMMI/GSI)
    
    emmi-presentation-2021.pdf
- 12:05 → 14:00
  
  Lunchbreak 1h 55m
- 14:00 → 15:20
  xyz: session 7
  - 14:00
    
    Production of X(3872) 40m
    
    Speaker: Alessandro Pilloni (INFN Roma)
    
    Alessandro_Pilloni_13_Apr_21.mp4
    
    Pilloni_high_multiplicity.pptx
  - 14:40
    
    Production of X(3872) 40m
    
    Speaker: Eric Braaten (Ohio State Univerity)
    
    Braaten_Xproduction.pdf
    
    Eric_Braaten_13_Apr_21.mp4
- 15:20 → 15:40
  
  Coffeebreak 20m
- 15:40 → 17:10
  xyz: session 8
  - 15:40
    
    Loosely bound states in relativistic nuclear collisions at the LHC 40m
    
    Speaker: Peter Braun-Munzinger (EMMI/GSI )
    
    Peter_Braun-Munzinger_13_Apr_21.mp4
    
    talk_pbm_XYZ.pdf
  - 16:20
    
    X(3872) and DDbar* interactions in a nuclear medium 25m
    
    Speaker: Miguel Albaladejo Serrano (JLAB)
    
    Albaladejo_X3872_med_FULL.pdf
    
    Miguel_Albaladejo_Serrano_13_Apr_21.mp4
  - 16:45
    
    The properties and production of fully-heavy tetraquarks in a strongly interacting medium 25m
    
    Speaker: Jiaxing Zhao (Tsinghua University)
    
    Fully-heavy Tetraquark in HIC_jxzhao.pdf
    
    Jiaxing_Zhao_13_Apr_21.mp4
Wednesday, 14 April
- 09:00 → 10:20
  xyz: session 9
  - 09:00
    
    LHCB results on charmonia 40m
    
    Speaker: Marco Pappagallo (Università e INFN Bari)
    
    Marco_Pappagallo_14_Apr_21.mp4
    
    Talk_XYZ_GSI_Pappagallo.pdf
  - 09:40
    
    LHCB results on exotic charmonia 40m
    
    Speaker: Sebastian Neubert (HISKP Uni Bonn)
    
    Sebastian_Neubert_14_Apr_21.mp4
    
    sneubert.exoticcharmonia.pdf
- 10:20 → 10:40
  
  Coffeebreak 20m
- 10:40 → 11:55
  xyz: session 10
  - 10:40
    
    Observation of the Zcs(3985) state at BESIII 25m
    
    Speaker: Ying-Chao Xu (UCAS)
    
    Ying-Chao_Xu_14_Apr_21.mp4
    
    Zcs3985_xuyc.pdf
  - 11:05
    
    Zcs exotics in B -> J/psi phi / K decays at LHCb 25m
    
    Speaker: Zehua Xu (Peking University)
    
    LHCb_Zcs_XYZ_Zehua_v2.pdf
    
    Zehua_Xu_14_Apr_21.mp4
  - 11:30
    
    Heavy fourquark states from lattice QCD 25m
    
    Speaker: Sasa Prelovsek
    
    prelovsek_xyz21.pdf
    
    Sasa_Prelovsek_14_Apr_21.mp4
- 11:55 → 14:00
  
  Lunchbreak 2h 5m
- 14:00 → 15:20
  xyz: session 11
  - 14:00
    
    Radiative a pionic transitions of Y(4320) and the new Z_sc(3982) 40m
    
    Speaker: Luciano Maiani (Universita' di Roma La Sapienza)
    
    Luciano_Maiani_14_Apr_21.mp4
    
    Maiani_XYZ_Workshop 2021.pdf
  - 14:40
    
    Inclusion of pi pi interactions in heavy meson decays 40m
    
    Speaker: Igor Danilkin (JGU Mainz)
    
    Danilkin2021_GSI.pdf
    
    Igor_Danilkin_14_Apr_21.mp4
- 15:20 → 15:40
  
  Coffeebreak 20m
- 15:40 → 16:55
  xyz: session 12
  - 15:40
    
    Insights on the Z_b(10610) and Z_b(10650) from the dipion decays 25m
    
    Speaker: Vadim Baru (Ruhr University Bochum)
    
    Baru_XYZ_2021.pdf
    
    Vadim_Baru_14_Apr_21.mp4
  - 16:05
    
    CMS results and prospects on XYZ states 25m
    
    Speaker: Ruslan Chistov (P.N.Lebedev Institute, Russian Academy of Sciences (LPI RAS))
    
    Ruslan_Chistov_14_Apr_21.mp4
    
    XYZ_Workshop2021_Chistov.pdf
  - 16:30
    
    GlueX results 25m
    
    Speaker: Sean Dobbs (Florida State University(FSU))
    
    sdobbs_XYZ21.pdf
    
    Sean_Dobbs_14_Apr_21.mp4
Thursday, 15 April
- 09:00 → 10:20
  xyz: session 13
  - 09:00
    
    Triangle singularities and new ideas about the X(3872) 40m
    
    Speaker: Feng-Kun Guo (Institute of Theoretical Physics, CAS)
    
    Feng-Kun_Guo_15_Apr_21.mp4
    
    XYZ_GSI_FKGuo.pdf
    
    XYZ_GSI_FKGuo.pptx
  - 09:40
    
    Importance of meson-meson and of diquark-antidiquark creation operators for a b-bar b-bar u d tetraquark 40m
    
    Speaker: Marc Wagner (Johann Wolfgang Goethe-Universität Frankfurt am Main)
    
    Marc_Wagner_15_Apr_21.mp4
    
    Slides.pdf
- 10:20 → 10:40
  
  Coffeebreak 20m
- 10:40 → 12:00
  xyz: session 14
  - 10:40
    
    Bottomonium resonances in the Born-Oppenheimer approximation using static potentials from lattice QCD 25m
    
    Speaker: Lasse Mueller (Goethe University Frankfurt)
    
    Lasse_Mueller_15_Apr_21.mp4
    
    XYZworkshop2021.pdf
  - 11:05
    
    Long ranged part of static potential 25m
    
    Speaker: Naeem Anwar (FZJ)
    
    Naeem_Anwar_15_Apr_21.mp4
    
    XYZ_GSI_Anwar.pdf
  - 11:30
    
    Hybrid static potentials at small quark-antiquark separations 25m
    
    Speaker: Carolin Riehl (Goethe University Frankfurt)
    
    Carolin_Riehl_15_Apr_21.mp4
    
    XYZWorkshop_Riehl.pdf
  - 11:55
    
    Workshop Photo - Screenshot 5m
    
    Speaker: Participants online
- 12:00 → 14:00
  
  Lunchbreak 2h
- 14:00 → 15:30
  xyz: session 15
  - 14:00
    
    Lattice QCD in the doubly heavy sector 40m
    
    Speaker: Sinéad Ryan (Trinity College Dublin)
    
    Sinead_Ryan_15_Apr_21.mp4
    
    SRyan_GSI.pdf
  - 14:40
    
    Heavy-Light Tetraquarks with Lattice QCD 25m
    
    Speaker: Martin Pflaumer (Goethe Universität Frankfurt)
    
    Martin_Pflaumer_15_Apr_21.mp4
    
    XYZ_MartinPflaumer.pdf
  - 15:05
    
    COMPASS results on XYZ states 25m
    
    Speaker: Alexey Guskov (Joint Institute for Nuclear Research)
    
    Alexey_Guskov_15_Apr_21.mp4
    
    EMMI_Workshop_2021.pdf
- 15:30 → 15:50
  
  Coffeebreak 20m
- 15:50 → 17:20
  xyz: session 16
  - 15:50
    
    Can We Resolve the Nature of χc1(3872) with PANDA? 25m
    
    Speaker: Klaus Götzen (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI))
    
    KGoetzen_XYZ_upload.pdf
    
    Klaus_Goetzen_15_Apr_21.mp4
  - 16:15
    
    Future relevant experiments 40m
    
    Speaker: Simon Eidelman (Budker Institute, Novosibirsk and Lebedev Institute, Moscow)
    
    Eidelman_futureperspectives.pdf
    
    Simon_Eidelmann_15_Apr_21.mp4
  - 16:55
    
    Closing of the workshop 5m
    
    Speaker: Christoph Hanhart (FZ Jülich)
    
    Christoph_Hanhart_closingremarks_15_Apr_21.mp4

Experimental and theoretical status of and perspectives for XYZ states

online

Confirmed invited speakers:

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