I will review the QCD Town Hall Meeting and White Paper, covering the achievements since the 2015 Long Range Plan and future prospects. I will discuss the recommendations and initiatives and the science behind them.
After decades of planning, the design and construction of a new Electron Ion Collider (EIC) are underway at the Brookhaven National Laboratory. This new versatile machine for studying fundamental properties of nuclear matter will map the emergence of nucleonic properties from the dynamical interactions of the dense partonic medium. In addition to flagship measurements addressing connections...
In this talk, I will review topics in heavy-ion physics at RHIC and the LHC which are related to the physics of the EIC. This includes recent work in understanding the initial state of protons and heavy nuclei, searching for saturation phenomena, and the use of ultra-peripheral collisions.
Jefferson Lab physics program ddresses important topics in nuclear, hadronic, and electroweak physics, including nuclear femtography, meson and baryon spectroscopy, quarks and gluons in nuclei, precision tests of the standard model and dark sector searches. Selected topics of the ongoing scientific program of the 12 GeV CEBAF will be presented. Also a potential energy upgrade of the...
Hadron scattering information can be accessed indirectly from lattice QCD by computing the spectrum of multi-hadron states and connecting to the infinite volume amplitudes via quantization conditions. This methodology was applied successfully for the two-hadron case to extract phase-shifts and resonance parameters. Only recently this methodology was extended to the three-hadron sector: both...
A fundamental property of the proton involves the system's response to an external electromagnetic (EM) field. It is characterized by the EM polarizabilities that describe how easily the charge and magnetization distributions inside the system are distorted by the EM field and the generalized polarizabilities that map out the resulting deformation of the densities in a proton subject to an...
The proton’s tensor charge, connected to internal quark transverse spin, is one of its fundamental properties. This quantity has garnered interest from various communities, being relevant for QCD phenomenology, ab initio studies (e.g., lattice QCD, Dyson-Schwinger), and low-energy beyond the Standard Model searches. In this talk I will review the current status of extractions of the...
Gluons are found to become increasingly dominant constituents of nuclear matter when being probed at higher energies or smaller Bjorken-$x$ values. This has led to the question of the ultimate fate of nuclear gluonic structure and its interaction with external probes at extreme density regimes. In ultrarelativistic heavy ion collisions, the electromagnetic fields surrounding an ion, quantized...
Jets are algorithmic realizations of the fragmentation and hadronization patterns of high energy quarks and gluons liberated in relativistic hadron collisions. The last few years have witnessed an explosion of interest in jet substructure from both experimentalists and theorists. These substructure observables are derived from exploiting the information present in the clustering algorithms....
Since the first detection of gravitational waves from the coalescence of neutron stars in 2017, many new discoveries and constraints have been placed on matter at large baryon densities. The study of dense matter has also been facilitied by heavy-ion collsions at low beam energies. Heavy-ion collisions experiments from RHIC at Brookhaven National Laboratory have ran the Beam Energy Scan and...
The combination of hard probes and pioneering processes such as semi-inclusive deep inelastic scattering (SIDIS) on atomic nuclei is a powerful tool to access medium modifications of their underlying structure, explore the hadronization mechanisms, and study QCD confinement dynamics in the cold nuclear medium. Indeed, the study of the hadronization process in such a clean environment is...
I recount the early motivation for creating the GHP along with the subsequent maneuvering that was needed to overcome obstacles.
The leading uncertainty in obtaining precise fundamental information from particle physics experiments is often due to the difficulty of quantifying non-perturbative strong-interaction effects.
Over the last decade, Lattice QCD simulations, in which space and time are approximated by a discrete lattice of points, have improved in precision to the extent that a number of important quantities...
Mesons with heavy flavor content are a promising probe of the hot QCD phases produced in heavy-ion collisions. I will present our recent progress on the thermal modification of the properties of heavy mesons in hot mesonic matter. We use a self-consistent theoretical approach that employs an effective field theory based on chiral and heavy-quark spin-flavor symmetries. We apply the...
I will give an overview of the findings via the observation of hadronic resonances in heavy ion collisions from SPS to RHIC and LHC energies. The short-lived resonances are interacting through the full evolution of the collision and can be used to probe the dynamics of the partonic and hadronic matter. I started this topic with my PhD research topic at the SPS and continued with my work at the...
I will present a short overview of some of the important developments in lattice QCD calculations in the context of relativistic heavy-ion collision experiments at RHIC. I will outline why lattice QCD calculation will play a critical role in the scientific success of the future EIC, and present some progress along these directions.
The intrinsic spin of fundamental particles emerges naturally from relativistic quantum mechanics, implying a deep connection between spin dynamics and the forces that ultimately shape the structure of our universe. Spin is therefore an excellent probe into the nature of complex theories, such as Quantum Chromodynamics, where the manifestation of spin correlations in dynamic objects like the...
