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The X17 particle, status and new ideas

Mar 23 – 27, 2026
ECT*
Europe/Rome timezone

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Contribution List

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  1. 74. REGISTRATION
    3/23/26, 9:00 AM
  2. 18. Workshop Overview — Organizers
    Carlo Gustavino, Elena Filandri (ECT*), Luca Doria (Johannes Gutenberg University Mainz), Michele Viviani (INFN - Pisa)
    3/23/26, 10:00 AM
  3. 20. Experiments to Detect the X17 Particle
    Attila Krasznahorkay (HUN-REN ATOMKI)
    3/23/26, 11:00 AM
  4. 55. Dark Photon Search with MAGIX at MESA
    Stefan Merkel (Institute for Nuclear Physics, Johannes Gutenberg University Mainz)
    3/23/26, 2:00 PM
  5. 56. DarkLight: a Model-Independent Search for the X17
    Ethan Cline (Stony Brook University, Stony Brook/US)
    3/23/26, 2:40 PM
  6. 57. TBA (TRIUMF-614)
    Michael Hasinoff (University of British Columbia)
    3/23/26, 3:20 PM
  7. 58. Welcome — ECT* Director
    Ubirajara van Kolck (ECT*, Trento)
    3/23/26, 4:30 PM
  8. 59. Discussion
    3/23/26, 5:00 PM
  9. 60. Highlights of the LNF/X17 workshop
    Fabio Bossi (INFN Frascati)
    3/24/26, 9:00 AM
  10. 61. The X17 search with the MEG-II apparatus
    Hicham Benmansour (INFN)
    3/24/26, 9:40 AM
  11. 62. Probing the Existence and Properties of the X17 Boson Using Proton and Neutron Beams
    Carlo Gustavino
    3/24/26, 10:50 AM
  12. 63. Study of the Anomalous Internal Pair Creation in Be at LNL-INFN
    Benito Gongora Servin (University of Padova / INFN-PD)
    3/24/26, 11:30 AM
  13. 64. Status of the PADME X17 Search
    Mauro Raggi (Sapienza University and INFN Roma1)
    3/24/26, 12:10 PM
  14. 65. Ongoing Search for X17 at the LHCb Experiment
    Martino Borsato (Milano-Bicocca University and INFN)
    3/24/26, 2:50 PM
  15. 66. Searching for the X17 Particle with the NA64 Experiment at CERN SPS
    Luca Marsicano
    3/24/26, 3:30 PM
  16. 67. Discussion
    3/24/26, 4:40 PM
  17. 35. Ab Initio Calculations of p-Induced e+e− Processes
    Petr Navratil (TRIUMF)
    3/25/26, 9:00 AM
  18. 36. Ab-Initio Studies of A=3,4 Nuclear Processes and X17
    Laura Elisa Marcucci (University of Pisa and INFN-Pisa)
    3/25/26, 9:40 AM
  19. 37. Constraining the Axial-Vector X17 Interpretation with 12C Data
    Cornelis Mommers (Johannes Gutenberg University Mainz)
    3/25/26, 10:50 AM
  20. 38. Pair Production in p+LiF Reactions
    Aldo Bonasera (Texas A&M,USA and LNS-INFN, Italy)
    3/25/26, 11:30 AM
  21. 68. Kaon Decay Constraints on Vector Bosons Coupled to Non-Conserved Currents
    Adrian Thompson (Northwestern University)
    3/25/26, 2:00 PM
  22. 69. Probing the X17 using Coherent Elastic Neutrino Nucleus Scattering
    Johan Rathsman (Department of physics, Lund University)
    3/25/26, 2:40 PM
  23. 40. Experimental Plan for the X17 Particle Search at Fudan University
    Jie Zhao (Fudan University)
    3/25/26, 3:50 PM
  24. 70. Discussion
    3/25/26, 4:10 PM
  25. 42. The X17 in U(1)'-Extended 2HDMs
    Stefano Moretti (University of Southampton (UK) & Uppsala University (Sweden))
    3/26/26, 9:00 AM
  26. 43. Constraining the X17: Neutrino NSI and IceCube Data
    Yasar Hicyilmaz (Balikesir University)
    3/26/26, 9:40 AM
  27. 44. The X17 with Chiral Couplings
    Max Fieg
    3/26/26, 10:50 AM
  28. 45. An Updated View on Parity-Conserving X17 Scenarios
    Claudio Toni (LAPTh, CNRS)
    3/26/26, 11:30 AM
  29. 46. X17 as a Protophobic Vector: Viable Couplings and Gaussian-Process Resonance Search Methods
    Emrys Peets (Stanford University, SLAC National Accelerator Laboratory)
    3/26/26, 2:00 PM
  30. 47. Axion-Like Electrophilic Portal for Pion Dark Matter
    Vincenzo Fiorentino
    3/26/26, 2:40 PM
  31. 48. Searching for Light Dark Particles with η and η′ Mesons
    Sergi Gonzalez-Solis (Universitat de Barcelona & Institute of Cosmos Sciences)
    3/26/26, 3:20 PM
  32. 71. Light Dark Sector via Thermal Decays of Dark Matter
    Marco Graziani (INFN, Sezione di Roma)
    3/26/26, 4:30 PM
  33. 72. Discussion
    3/26/26, 5:10 PM
  34. 50. Light Boson Searches with New JEDI: Current Results and Perspectives
    Beyhan Bastin (GANIL)
    3/27/26, 10:00 AM
  35. 52. The Montreal X17 Experiment: Status Report
    Luca Doria (Johannes Gutenberg University Mainz)
    3/27/26, 11:15 AM
  36. 73. Final Remarks and Conclusions
    3/27/26, 11:30 AM
  37. 32. Dark Photon Search with MAGIX at MESA
    Stefan Merkel (JGU Mainz)
  38. 25. Discussion
  39. 41. Discussion
  40. 49. Discussion
  41. 53. Final Remarks and Conclusions
  42. 54. Final Remarks and Conclusions
  43. 21. Frascati Workshop Recap
    Fabio Bossi (INFN Frascati)
  44. 33. Light Boson Searches with New JEDI: Current Results and Perspectives
    Beyhan Bastin (GANIL)
  45. 23. Light Dark Sector via Thermal Decays of Dark Matter
    Marco Graziani (INFN Roma)
  46. 30. Ongoing Search for X17 at the LHCb Experiment
    Martino Borsato (Milano-Bicocca University & INFN)
  47. 27. Probing the Existence and Properties of the X17 Boson Using Proton and Neutron Beams
    Carlo Gustavino (n_TOF Collaboration)
  48. 22. Probing the X17 using Coherent Elastic Neutrino Nucleus Scattering
    Johan Rathsman (Lund University)
  49. 31. Searching for the X17 Particle with the NA64 Experiment at CERN SPS
    Luca Marsicano (INFN)
  50. 28. Study of the Anomalous Internal Pair Creation in Be at LNL-INFN
    Benito Gongora Servin (University of Padova & INFN-PD)
  51. 29. TBA
    Marco Mancini (INFN-LNF)
  52. 34. TBA
    Mohammad Faiz Khan (K1-MET)
  53. 39. TBA
  54. 51. TBA
    Mohammad Faiz Khan (K1-MET)
  55. 24. The thermodynamic properties of the X17 boson and its role in the early universe
    Behnam Ali Mohammadzadeh (INFN Roma)
  56. 19. Workshop Overview — Organizers
  57. 26. X17 Search with the MEG II Experiment
    Cecilia Voena (Sapienza University & INFN Roma)