- 3D hadron structure from next-generation scattering experiments and lattice QCD
Determining the 3-dimensional spatial structure of hadrons and nuclei in terms of the fundamental QCD degrees of freedom is a grand challenge problem for contemporary nuclear physics. This workshop will summarize recent progress and future perspectives in this effort, which includes: novel scattering processes providing access to GPDs; progress in lattice calculations of GPDs; and Use of advanced mathematical methods and AI/ML to approach the "inverse problem" of GPD extraction in a global analysis.
- AI in Nuclear Physics Experiments
The explosive growth of artificial intelligence (AI) has started to change the landscape of nuclear physics. This workshop aims to showcase the state-of-the-art AI algorithms developed by nuclear experimentalists, along with the challenges they faced and the successes they accomplished. These successes could motivate more nuclear experiments to use AI, bringing new opportunities for scientific breakthroughs.
- Astrophysical Neutrinos
Neutrino astronomy is a rapidly growing field, with discoveries and advances being made on a regular basis. Some recent examples are the CNO solar neutrino detection by the Borexino experiment and the detection of the astrophysical tau neutrino candidates by Ice-Cube. US-Japan cooperation has been essential for advancing the field, facilitating such breakthroughs as the 1998 Nobel-prize winning discovery of neutrino oscillations by the Super-Kamiokande experiment that is also currently the world's leading supernova neutrino detector. This workshop provides a paramount opportunity for scientists to share their latest research in this fast-evolving field and start new multi-continental collaborations. One such collaborative effort was recently explored in a dedicated workshop within the US-Japan Cooperation Program in High Energy Physics to consider parameters of an experimental program aimed at measurement of neutrino-nucleus cross sections in the <50 MeV regime relevant for supernova neutrino detection. Measurement needs of existing and planned supernova neutrino detectors that could be feasibly addressed using stopped-pion neutrino sources in the US and Japan will also be discussed.
- Chirality and Vorticity Effects from Nuclear Systems to Condensed Matter (full day)
Chirality and vorticity in nuclear (such as heavy ion collisions and compact stars) and condensed-matter (such as Dirac and Weyl semimetals) systems are novel probes to deepen our understanding of nontrivial quantum/real-time/many-body dynamics governed by Quantum Electrodynamics (QED) and/or Quantum Chromodynamics (QCD). This workshop is dedicated to bringing together leading experts from both theory and experiment for in-depth and cross-disciplinary reviews of the current status and challenges as well as insightful outlooks into future prospects.
- Data Acquisition Systems
Data AcQuisition Systems (DAQ) are now undergoing a major transition from the traditional trigger-driven approach to streaming DAQ. This new concept of DAQ is beginning to be introduced in some nuclear physics experiments such as sPHENIX and J-PARC. At the same time, these new DAQs require state-of-the-art technologies such as high-speed front-end electronics, high-throughput data processing, and precise clock synchronization. It is difficult for individual laboratories to realize such advanced DAQ, and international joint development should be considered. In this workshop, we will report the recent status of DAQ in the US and Japan, and discuss the possibility of new collaboration.
- Detector Development Cooperation between the US and Japan, Developing Synergies Across NP and HEP
This workshop will bring together physicists from both the NP and HEP groups to discuss efforts and projects on Research and Development (R&D) with multiple applications in a wide variety of experiments. The workshop will provide a venue to discuss how both communities can work together in developing novel instrumentation for projects like the EIC and future LHC upgrades.
- Equation of State of Dense Nuclear Matter
Recent experiments with heavy-ion and rare isotope beams from low to ultra-relativistic energies, together with multi-messenger observations of neutron stars and their mergers, have led to significant progresses in understanding various aspects of the nuclear matter Equation of State. In this workshop, six leading experts will overview the major progresses made and outstanding scientific issues remaining in this exciting field.
- Exploring the Ultra-Strong Electromagnetic Fields of Heavy-Ion Collisions
The environment created by heavy-ion collisions, characterized by extremely intense electromagnetic and gluon fields, is now known to offer unparalleled opportunities for testing the boundaries of the Standard Model and investigating non-linear regimes of QED and QCD. This workshop seeks to bring together theorists and experimentalists to discuss the latest developments and identify new areas of research in this rapidly growing field of study.
- Exploring Excited Nucleons with Meson, Electron, and Photon Beams
The focus of the workshop will be on the spectrum and structure of nucleon resonances (N*), as revealed via N* electroexcitation amplitudes. Such fundamental information on the mechanisms of strong-coupling QCD is crucial to validating any proposed solution to the theory. Precise data from both electron and pion beams are necessary for developing robust approaches for amplitude analyses, capable of delivering sound results for N* quantum numbers and excitation amplitudes over a broad range of q2.
- Fast Time Silicon Detectors Towards 4D Trackers
The workshop will review extensive developments of 4D-tracking detectors and their future applications in the NP and HEP experiments and beyond. Discussions will focus on the development and optimization of silicon sensors with precision timing capabilities, and design of specialized electronics to fully exploit the precise measurements delivered by these sensors. Experiences and challenges with designing and testing full system implementations will also be discussed.
- Fragment Separation at RIBF and FRIB and Rare Isotope Production Mechanisms
The workshop will explore the limits of rare isotopes that can be produced at RIBF and FRIB. Highlights from recent new isotope searches will be presented as well as recent advances in fragment separation techniques. Talks will include a summary of production mechanisms and recent experimental studies. Operational experience from BigRIPS and ARIS will be presented. The material presented will be relevant for people considering proposing experiments at either facility.
- Frontiers of Spin-Isospin Excitations
New experimental techniques have greatly increased opportunities to study spin-isospin excitations, including through (double) charge-exchange reactions and beta-decay studies. This progress has been accompanied by advances in theoretical descriptions of spin-isospin excitations. This workshop will focus on the frontier of these spin-isospin studies, from both the experimental and theoretical perspectives.
- Future of Hot and Cold QCD Physics at High-Energy Colliders and Their Synergies
This workshop will share the synergies between the strongly interacting quark-gluon plasma physics (hot QCD) and the complex internal structure of high-energy nucleons and nuclei (cold QCD), where the non-perturbative dynamics of quarks and gluons play an important role, and discuss the future QCD physics programs in order to strengthen the international collaboration between the U.S. and Japanese high-energy nuclear physics communities.
- Future Prospects of Direct Detection of Dark Matter
For more than 40 years experiments have sought for signals of Dark Matter with terrestrial experiments. One primary focus has been on WIMPs and another on Axions. The experiments pursuing Dark Matter have made tremendous progress so far in restricting parameter space for these models. The workshop will present recent advances in Dark Matter models and recent results from major experiments in the field. The workshop format encourages engagement from all the participants and will result in an active discussion of the current results and the implications for future searches.
- Future Prospects of Neutrinoless Double Beta Decay
This workshop will present talks on our theoretical understanding and experimental exploration of neutrinoless double-beta decay. After an introductory survey on the implications for a Majorana neutrino, a series of talks will discuss the status and prospects of neutrinoless double-beta decay searches in different isotopes at underground laboratories worldwide. The goals of the workshop are to engage participants in the discussion of this lepton-number-violating process and to stimulate future developments in the field.
- Gas Cells for Rare Isotope Beam Research
Ion stopper gas cells are a key technology in modern nuclear physics, bridging the gap between the energetic production of radioactive nuclides far from stability and the low-energy requirements of many high-precision techniques such as laser spectroscopy and high-precision mass measurements. The workshop on ion stopper gas cells will cover the historical origins of the technology, presently cutting edge implementations, and future possibilities.
- Jet-Medium Interactions and Interplay Between Hard-Soft Physics
A standard picture of jet evolution in the quark-gluon plasma medium is finally being established two decades after the first observation of jet quenching at RHIC. This workshop is devoted to understanding the interplay between hard jet and soft medium in heavy-ion collisions, in particular parton thermalization and medium response through jet-medium interactions.
- Multi-Neutron Systems
This workshop focuses on the dynamics of pure-neutron nuclei and multi-neutron clusters, such as the tetra neutron 4n, which has recently been identified experimentally and has sparked an intense debate. State-of-the-art experimental and theoretical studies on this hot topic will be presented and discussed in the workshop, while future programs to probe these systems in world-leading RI-beam facilities, such as RIBF and FRIB, will be delineated. The workshop will provide a unique platform for a fruitful exchange of ideas on mutli-neutron systems with an aim to foster further studies and establish new collaborations that can have an impact on our understanding of this hot topic.
- Neutron Fundamental Physics
This workshop will address the current status and future prospects of experiments which use neutron beams and ultracold neutrons. Topics will include searches for CP-violation using ultracold neutrons and nuclear reactions, precision measurements of beta-decay, neutron oscillation experiments, and searches for new short-ranged forces.
- New Detector Technologies for Radioactive Isotope Beam Facilities
This workshop covers new developments and technologies for detectors used in nuclear experiments performed with rare isotopes. The world's leading rare isotope beam facilities FRIB and RIBF are located in the United States and Japan, respectively. By sharing their knowledge, the speakers are encouraged to promote a collaborative and synergistic advancement of experimental techniques between these two outstanding facilities.
- New Results and Prospects of Time Projection Chambers for Low-Energy Nuclear Physics
Recent highlights of radioactive beam experiments using active target time-projection chambers will be presented. Future projects including the AT-TPC campaign at the RCNP will be discussed.
- Nuclear Theory for New Physics
At this workshop, we will discuss recent theoretical developments in fundamental symmetry tests including searches for neutrinoless double beta decay, lepton flavor violation and electric dipole moments, precision beta decay.
- Perspectives for Decay Spectroscopy with Fast Fragmentation Beams
The fast fragmentation beam facilities enable access to nuclei with extreme proton-to-neutron ratios. Radioactive decay experiments are often the first to provide information on their existence, decay mode, or lifetime. The wide selection of isotopes enabled a broad spectrum of studies testing nuclear models and their impact on astrophysics. RIBF RIKEN in Japan and NSCL in the US supported productive and successful decay spectroscopy programs. With FRIB becoming operational in 2022 and the first successful experiments in decay spectroscopy, this research track will continue its strong and diverse program. In looking toward future science directions, the workshop presenters will address relevant scientific challenges in nuclear theory and astrophysics and look back into the most impactful results from the past in both facilities.
- Physics at High Baryon Density: Search for QCD Critical Point in High-Energy Nuclear Collisions
This workshop will focus on recent progresses in the physics at high baryon density including the EOS of nuclear matter, the search for the QCD critical point and the first order phase boundary. Both experimental and theoretical reviews on the present status and future prospects will be presented and discussed.
- Polarized Drell-Yan Physics at Fermilab
This workshop will review ongoing theoretical efforts, as well as the current status and future plans of the Drell-Yan program at Fermilab, with a specific focus on the role of spin asymmetries in probing parton distributions and color dynamics in the strong interaction.
- Polarized Ion Sources and Targets
Development of new polarized ion sources and targets is essential for future frontier research in nuclear facilities around the world. The workshop presents the status of new concepts for sources and targets to take advantage of the new and planned accelerators. Timely availability of the new technology is essential to design new experiments at the next generation accelerators.
- Precision Muon and Pion Physics to Test the Standard Model
Highly sensitive tests of the Standard Model are being made through high-precision muon and pion experiments. These include muon the g-2 and EDM, muonium spectroscopy, and rare pion decays that test lepton flavor universality and CKM unitarity. We anticipate new experimental and theoretical updates to be presented.
- Scientific Opportunities in Nuclear Physics with High-Intensity, Low-Energy Electron Accelerators
High-intensity, low-energy (< 300 MeV) electron scattering experiments are being pursued in Canada, Germany and Japan to further studies in subatomic physics: nuclear structure of rare isotopes; searches for new physics beyond the Standard Model (SM); nuclear astrophysics and the electromagnetic structure of the nucleon and few-body nuclei at low momentum transfers. The workshop aims to bring together the major experiments underway as well as exciting possibilities for the future and present it to the Japan-US nuclear physics community.
- Recent Advances in Nuclear Data Studies
This workshop will bring together the nuclear data communities from the US and Japan, focusing on recent developments that advance our understanding and determination of nuclear data. We will have overviews of both the recently released JENDL-5.0 library and the soon-to-be-released ENDF/B-VIII.1 library along with new developments in for fission product yields, covariances, and applications. Cross-cutting nuclear data activities will also be discussed to give a broader background for the use of these various developments.
- Recent Developments in Fission
This workshop will highlight a number of reent results in fission theory and experiment. Theory highlights include angular momentum generation and new developmemnts in microscopic theory and dynamical treatments. The experimental talks will cover spin-energy correlations, spontaneous fission of Fm isotopes, and multi-nucleon transfer induced fission.
- Recent Highlights and Future Opportunities for In-beam Gamma-ray Spectroscopy in North America and Japan
Experimental efforts using the broad range of techniques covered by in-beam gamma-ray spectroscopy using a number of different arrays including HPGe and scintillator systems will be highlighted. After a period which saw the deployment of a novel HPGe array at RIBF, and the first in-beam gamma experiments at FRIB with GRETINA, a broad overview in this joint session is timely.
- Recent Progress in Nuclear Physics with Hyperons
Recently, various progress has been made in experiments on few-body Λ hypernuclei, double strange hypernuclei, hyperon-nucleon scattering, and baryon-baryon correlation at J-PARC, JLab, RHIC, etc. Theoretical studies have been also developed on baryon-baryon interactions, hypernuclear structure, and nuclear EOS with hyperons. This workshop will provide a forum for discussion on recent results and their implications to other fields.
- Science of Intense High Energy Rare Isotope Beams
The workshop will review the current status and future developments in physics of high intensity rare isotope beams. The topics covered are related to the experimental programs at RIBF and FRIB, as well as FRIB400, including the EOS of neutron stars, nuclear fission, r-process, nuclear reaction and charge exchange reactions.
- Spectroscopy of Hyperons and Heavy Baryons at JLab and J-PARC
Next generation facilities, the K-Long Facility (KLF) at JLab and the high-momentum secondary beamline (pi20) at J-PARC, will be ready for spectroscopy of hyperons and heavy baryons. They include the heavy quark (s or c) as an impurity, and reveal the effective DoF from precise and accurate determination of their properties.
- Super Heavy Nuclei and New Elements
Japan and the US are aiming to synthesize new chemical elements, with 119 and 120 protons, respectively. This workshop will provide a platform for an exchange of expertise exchange helping both experimental campaigns. The talks will include an overview of the field of super heavy nuclei and atoms, status reports on the experiments and facilities as well as the theoretical models.
- The ePIC Experimental Program at the EIC
The workshop overviews the EIC program, with emphasis on the ePIC experiment, the EIC project detector currently being developed. It includes an overview of EIC physics from the nucleon to the nucleus, an overview of the ePIC detector and its experimental program, and specific presentations of cutting-edge Detector R&D that is ongoing in collaboration between the US and Japan.
- The Origin of the Heavy Elements (full day)
This workshop will summarize the current status of our understanding of the origin of the heavy elements as a complex interplay of multiple slow, intermediate, and rapid neutron capture processes, complemented by processes induced by charged particles, gamma rays, and neutrinos. We will discuss advances in the underlying nuclear physics through experimental measurements of nuclear properties and reactions; advances in models of nucleosynthesis sites and the chemical evolution of galaxies; and the nuclear signatures in observations of gravitational waves, kilonova light curves, stellar spectra, and stardust.
- Time-Dependent Approaches in Nuclear Physics
This workshop will bring together experts in time-dependent phenomena in nuclear physics. The scope of the workshop spans from nuclear fission to relativistic hydrodynamics and covers the myriad degrees of freedom and multiple energy scales of the applications in between. The workshop will provide an opportunity for these typically disparate fields to present their work, share their expertise, and potentially identify how to extend their methods regardless of if their application domain lies in nuclear reactions or decay mechanisms.
- When Color meets Gravity: Gravitational Form Factors of the Nucleon
The gravitational or energy-momentum tensor form factors of the nucleon and nuclei encode information about their mass, spin, pressure, and shear forces distributions. Accessing these form factors, especially those related to the gluonic fields, requires targeted measurements aided by sound theoretical approaches. This workshop will discuss determining these form factors through existing and future measurements at worldwide facilities along with the different theoretical methods.
The DNP 2023 Fall meeting website is supported by FRIB, MSU.