Name: Low Energy Electron Positron Physics at Jefferson Lab
Start: 2026-03-23T08:30:00-04:00
End: 2026-03-27T17:55:00-04:00
Location: CEBAF CENTER

Low Energy Electron Positron Physics at Jefferson Lab

from Monday, March 23, 2026 (8:30 AM) to Friday, March 27, 2026 (5:55 PM)

Monday, March 23, 2026
8:30 AM
8:30 AM - 12:30 PM
Room: F113
Contributions

8:30 AM Registration & Light Breakfast

8:55 AM Workshop Practical - Douglas Higinbotham (Jefferson Lab)

9:00 AM Positron physics program at Jefferson Lab - Wally Melnitchouk (Jefferson Lab)

9:35 AM Welcome - Jens Dilling (Jefferson Lab)

9:50 AM Workshop Charge - Eric Voutier (Université Paris-Saclay - CNRS/IN2P3/IJCLab)

10:00 AM From antimatter to materials: the power of low-energy positrons - Farida Selim (Arizona State University)

11:00 AM Low energy electron positron Physics at the LERF - Kevin Jordan (Jefferson Lab)

11:30 AM The Ce+BAF 12 GeV concept - Yves Roblin (jefferson lab)

12:00 PM Recirculating injector at LERF - Layout and optics architecture - Alex Bogacz (Jefferson Lab)
12:30 PM Lunch
Lunch
12:30 PM - 1:45 PM
Room: F113
1:45 PM
1:45 PM - 5:30 PM
Room: F113
Contributions

1:45 PM An R&D program for milliampere spin-polarized electron beams - Max Bruker (Jefferson Lab)

2:15 PM Design of a high power 10 MeV electron beam injector for the LERF - Victor Manuel Lizarraga-Rubio

2:45 PM A high-power positron converter based on a recirculated liquid metal in-vacuum target - Karl Smolenski Karl Smolenski (Xelera Research LLC) Karl Smolenski (Cornell University)

3:45 PM The solid positron converter target at Jefferson Lab - Silviu Covrig Dusa (Jefferson Lab)

4:15 PM Development of a rotating target - Yu Morikawa (KEK)
5:30 PM Reception
Reception
5:30 PM - 7:00 PM
Room: LOBBY
Tuesday, March 24, 2026
8:45 AM
8:45 AM - 12:30 PM
Room: F113
Contributions

8:45 AM Low-Energy Positrons as probes of Surface Electronic and Chemical Structure: current studies and new opportunities with high-flux positron beams - Alex Weiss (University of Texas at Arlington)

9:15 AM Slow mono-energetic positron beams for defect characterization in materials science - Marcel Dickmann (University of the Bundeswehr Munich)

9:45 AM Total-reflection high-energy positron diffraction: principle and application - Yuki Fukaya (Japan Atomic Energy Agency)

10:45 AM A new pulsed low energy positron system at the UniBwM-Lab:design and current status - Ricardo Helm (University of the Bundeswehr Munich)

11:15 AM Status of the scanning positron microscope at the NEPOMUC positron source - Johannes Mitteneder (Universität der Bundeswehr München)
12:30 PM Lunch
Lunch
12:30 PM - 1:45 PM
Room: F113
1:45 PM
1:45 PM - 5:50 PM
Room: F113
Contributions

1:45 PM Heaven and Earth: connecting JLab to the cosmos - Jorge Piekarewicz (Florida State University)

2:15 PM Probing charge form factors with low energy leptons and hadronic beams - Paul Gueye (Facility for Rare Isotope Beams/Michigan State University) Paul Gueye (FRIB/MSU)

2:45 PM Test of Weizsaker-Williams method using Compton scattering from atomic electrons - Bogdan Wojtsekhowski (Jefferson Lab)

3:45 PM Dark sector searches at Ce+BAF - Marco Battaglieri (JLab/INFNGE)

4:15 PM Positron beam-based search for a MeV mass range axion - Weizhi Xiong (Syracuse University)
Wednesday, March 25, 2026
8:45 AM
8:45 AM - 12:30 PM
Room: F113
Contributions

8:45 AM Phase-sensitive spectroscopy of n=2 positronium fine-structure intervals - Donovan Newson

9:15 AM An energy tunable positronium beam produced using photo-detachment of positronium negative ions - Yasuyuki Nagashima (Department of Physics, Tokyo University of Science)

9:45 AM Laser cooling of positronium toward precision measurement - Kenji Shu

10:45 AM Electron plasmas and positron bunches in levitating and supported magnetic dipole traps - Matthew Stoneking

11:15 AM A method to measure positron beam polarization using optically polarized atoms - Tim Gay
12:30 PM

12:30 PM - 12:40 PM
Room: F113

12:40 PM Lunch
Lunch
12:40 PM - 2:00 PM
Room: F113

2:00 PM

2:00 PM - 4:30 PM
Room: AUDITORIUM

5:30 PM

5:30 PM - 8:00 PM
Room: F113
Thursday, March 26, 2026
8:45 AM
8:45 AM - 12:30 PM
Room: F113
Contributions

8:45 AM Chiral dynamics in low-energy electron- and positron-nucleon scattering - Christian Weiss (Jefferson Lab)

9:15 AM Precision studies of astrophysically relevant nuclear structure and reactions: from MAMI to MESA and beyond - Concettina Sfienti (University of Mainz)

9:45 AM Low energy neutrino-nucleus interaction - Kate Scholberg (Duke University)

10:35 AM The Sherman function and its radiative corrections for elastic positron-nucleus scattering - Doris Jakubassa (University of Munich)

11:05 AM Radiative corrections to elastic lepton-proton scattering with McMule - Matteo Ronchi (Johannes Gutenberg University)

11:35 AM Neutron-polarizability extraction and new-physics search using deuteron photodisintegration - Cornelis Mommers
12:30 PM Lunch
Lunch
12:30 PM - 1:45 PM
Room: F113
1:45 PM
1:45 PM - 5:35 PM
Room: F113
Contributions

1:45 PM High energy and slow positron sources at KEK - Yoshinori Enomoto (KEK)

2:15 PM Applications of the compact positron source at SLAC - Spencer Gessner (SLAC)

2:45 PM Low-energy monochromatic high-intensity high-brightness positron source in the LERF and its possible applications - Branislav Vlahovic (North Carolina Central University)

3:35 PM Moderator informed compact positron source optimization - Sophie Crisp (SLAC National Accelerator Laboratory)

4:05 PM Investigation of spin rotation in polarized electron and position beams at CEBAF - Fanglei Lin (Oak Ridge Notional Laboratory)

4:35 PM Spin light polarimetry for low energy electron/positron beams - Dipangkar Dutta (Mississippi State University)
Friday, March 27, 2026
8:45 AM
8:45 AM - 12:30 PM
Room: F113
Contributions

8:45 AM Improved search for CP-violation in ortho-positronium decay - Tom-Erik Haugen (National Institute of Standards and Technology)

9:15 AM An accelerator-based source of high-intensity quantum-entangled annihilation gamma photons - Riad Suleiman (Jefferson Lab)

9:45 AM High precision fundamental physics experiments using particle accelerator compact spin-transparent storage rings of low-energy polarized electron/positron beams - Vardan Khachatryan (Stony Brook University) Vladimir Khachatryan (Mississippi State University) Vladimir Khachatryan Vladimir Khachatryan (Duke University)

10:35 AM New Physics searches via Beam Normal Spin Asymmetry in Bhabha scattering - Aleksandr Pustyntsev (University of Mainz)

11:05 AM Positron source characterization and New Physics searches with Bhabha scattering - David Mack (JLab)

11:35 AM The DarkLight experiment at ARIEL TRIUMF - Win Lin (Stony Brook University)
12:30 PM Close-out
Close-out
12:30 PM - 12:40 PM
Room: F113

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