Workshop on NREC 2026 (the second workshop on Nuclear Radius Extraction Collaboration)

America/New_York
CFNS, C 120: Peter Paul Seminar Room, Physics Building (Stony Brook University / Online)

CFNS, C 120: Peter Paul Seminar Room, Physics Building

Stony Brook University / Online

Description

NREC logo

The workshop presentations should be given IN PERSON, and in some specific cases ON ZOOM if the in-person participation is not possible.

This event is a part of the CFNS workshop / ad-hoc meeting series. See the CFNS CONFERENCES AND WORKSHOPS webpage for other events.

Note: The remote Zoom link is only visible to the registered participants. After registration, the Zoom link will appear on the menu bar.

Description:  The extraction of the size and structure of hadrons/nuclei is an important and exciting research branch of modern nuclear, particle and atomic physics. In particular, the "proton charge radius puzzle" was born about 15 years ago, when measurements of this radius based on the results obtained from three types of experiments differed by more than five standard deviations. Two years ago, Nuclear Radius Extraction Collaboration (NREC) was founded, having one of the goals to help resolve this discrepancy and assist in developing the entire field. As such, NREC being an experimental-theoretical alliance may have an indispensable role in the future, related to the developments in phenomenology, theory, and experiment.
    One of the other NREC's goals is to provide a platform for information exchange to find synergies between various groups, which carry out studies and extractions of nucleon form factors, radii and related quantities. Our focus also goes to a wider field including weak/strong/gravitational form factors, other radii of particles beyond the nucleon, including conventional/non-conventional mesons, baryons, light and heavy nuclei, etc..

Objectives:  The proposed workshop will assess the current status and prospects in studies of some of the key topics related to hadronic and nuclear size/structure, which has only been partially covered during the first inaugural NREC workshop held at CFNS in May of 2024 in cooperation with PREN and μASTI: NREC first workshop. In addition, we will also focus on
  a) promotion of physics simulations and phenomenological/theoretical calculations in a broad effort;
  b) promotion and completion of the NREC White Paper.

Topics to be discussed:  Some of the research areas to be covered by NREC are highly relevant in the context of the Electron-Ion Collider. To facilitate discussions incorporating the EIC physics and broader physics covered by NREC, the workshop will be multi-disciplinary. The primary topics to be covered are 
   (i) hadronic (and light nuclei) radii and form factors from lepton/neutrino scattering and electronic-/muonic-hydrogen spectroscopy; 
   (ii) the associated radiative corrections for scattering and spectroscopy; 
 (iii) nuclear radii and neutron skin from lepton scattering experiments as well as from collinear laser spectroscopy; 
  (iv) current and upcoming lepton/neutrino scattering experiments.

 

This workshop is hosted at and supported by

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Registration
Registration for the meeting
Participants
    • Monday
      • 1
        Opening remarks by the organizing committee chair
        Speaker: Jan Bernauer
      • 2
        Report from 2025 ECT* workshop on "light nuclei charge radii" by the organizers
        Speaker: Franziska Hagelstein
      • 3
        Sub-part-per-trillion test of the Standard Model with atomic hydrogen
        Speaker: Lothar Maisenbacher
      • 10:20 AM
        Coffee
      • 4
        Precise nuclear charge radius determination via bound electron g-factors
        Speaker: Fabian Heiße
      • 5
        Nuclear Charge Radii from the Simplest Molecules: Status and Perspectives
        Speaker: Soroosh Alighanbari
      • 11:40 AM
        Discussion
      • 12:00 PM
        Lunch
      • 6
        Measurements of the Lamb shift in antihydrogen at GBAR-CERN for the antiproton charge radius determination
        Speaker: Christian Regenfus
      • 7
        Overview on energy-momentum tensor form factors and mass/mechanical radii
        Speaker: Peter Schweitzer
      • 2:50 PM
        Coffee
      • 8
        Beyond the charge radius: using King Nonlinearity to study nuclei structure at unprecedented precision
        Speaker: Gil Paz
      • 9
        Measurements of the nuclear charge and nuclear mass radii in ultra-peripheral nuclear collisions
        Speaker: Zhangbu Xu
      • 4:20 PM
        Discussion
    • Tuesday
      • 10
        Determination of the proton charge radius during the ULQ2 experiment
        Speaker: Clement Legris
      • 11
        Overview on electromagnetic form factors and radii from lepton scattering
        Speaker: Haiyan Gao
      • 10:20 AM
        Coffee
      • 12
        The AMBER experiment at CERN on the proton electromagnetic form factor and charge radius measurements
        Speaker: Jan Friedrich
      • 13
        The Future of Electron Scattering Experiments in Mainz
        Speaker: Patrick Achenbach
      • 11:40 AM
        Discussion
      • 12:00 PM
        Lunch
      • 14
        The Muon Scattering Experiment
        Speaker: Thomas Krahulik
      • 15
        Proton shape/size determination at the EIC kinematics through vector meson production
        Speaker: Arjun Kumar
      • 16
        Extracting neutron distributions using parity violating electron scattering
        Speaker: Chandan Ghosh
      • 3:00 PM
        Coffee
      • 17
        Overview on measurements of the neutron charge radius
        Speaker: Michael Paolone
      • 18
        Proton radius from disperion theory and EFT methods
        Speaker: Christian Weiss
      • 4:30 PM
        Discussion
    • Wednesday
      • 19
        QUARTET: precision measurements of the charge radii of light nuclei
        Speaker: Ben Ohayon
      • 20
        Ab initio charge form factors and radii of light isoscalar nuclei
        Speaker: Xiang-Xiang Sun
      • 10:00 AM
        Coffee
      • 21
        Exploring the size of atomic nuclei at the limits of existence with laser spectroscopy
        Speaker: Shane Wilkins
      • 22
        Collinear laser spectroscopy in 12-14C
        Speaker: Kristian König
      • 11:40 AM
        Discussion
      • 12:00 PM
        Lunch
      • 23
        Radbase: designing tools for a modern nuclear charge radius evaluation
        Speaker: Hunter Staiger
      • 24
        Proton electromagnetic form factors and radii from Lattice QCD
        Speaker: Martha Constantinou
      • 25
        Proton polarizabilities and polarizability radii
        Speaker: Nikos Sparveris
      • 3:20 PM
        Discussion and Coffee
      • 6:30 PM
        Workshop Reception Dinner
    • Thursday
      • 26
        In-medium electromagnetic form factors and charge radii of pseudoscalar and rho mesons
        Speaker: Parada Hutauruk
      • 27
        Radiative corrections in (anti)neutrino-nucleon scattering and nucleon structure
        Speaker: Oleksandr Tomalak
      • 10:00 AM
        Coffee
      • 28
        Precision Chiral EFT Analysis of Low-energy Lepton-Proton Two-photon Exchange including Hadronic Effects
        Speaker: Udit Raha
      • 29
        Nonperturbative QCD Insights into Meson Charge Radii
        Speaker: Adnan Bashir
      • 11:30 AM
        Discussion
      • 12:00 PM
        Lunch
      • 30
        The Nucleon Axial Form Factor Extracted from Elementary Targets
        Speaker: Aaron Meyer
      • 31
        Instrumental uncertainties in radiative corrections for the MUSE experiment
        Speaker: Steffen Strauch
      • 32
        Overview on measurements and studies of the two-photon exchange
        Speaker: Peter Blunden
      • 3:00 PM
        Coffee
      • 33
        Radiative corrections in measurements of the proton radius
        Speaker: Igor Akushevich
      • 34
        Blinding Precision Scattering Experiments
        Speaker: Ethan Cline
      • 4:30 PM
        Discussion
    • Friday
      • 35
        Extraction of the pion, kaon and nucleon gravitational form factors using continuum Schwinger methods
        Speaker: Daniele Binosi
      • 36
        TBD
        Speaker: TBD
      • 10:00 AM
        Coffee
      • 37
        Make QED great again
        Speaker: Adrian Signer
      • 38
        Measurement of the proton gravitational form factors at Jefferson Lab
        Speaker: Zein-Eddine Meziani
      • 11:30 AM
        Discussion
      • 12:00 PM
        Lunch
      • 39
        Extraction of the proton mass radius through J/psi photoproduction
        Speaker: Dmitri Kharzeev
      • 40
        Nuclear mass radius, pressure and the D-term
        Speaker: Yoshitaka Hatta
      • 41
        Nucleon gravitational form factors and radii in holographic QCD
        Speaker: Kiminad Mamo
      • 3:00 PM
        Coffee
      • 42
        Charge Radii measurements at JLab with electon and positron beams
        Speaker: Dipangkar Dutta
      • 43
        Discussion and closing remarks