Conveners
Plenary talk
- Marc Vanderhaeghen
Plenary talk
- Igor Danilkin
Plenary talk
- Nils Hüsken (JGU Mainz)
Plenary talk
- Achim Denig
Plenary talk
- Annalisa D'Angelo
Plenary talk
- Vladimir Pascalutsa (JGU Mainz)
Plenary talk
- Misha Gorshteyn (JGU Mainz)
Plenary talk
- Marc Vanderhaeghen
Plenary talk
- Alessandro Pilloni (Messina U. and INFN Catania)
We will provide an overview of recent lattice results on nucleon structure. Specifically, we will describe recent progress in the determination of nucleon charges, form factors and second Mellin moments. We will discuss the main ingredients involved in the analysis that yield results with controlled systematics reaching, for some observables, percent accuracy. We will also review lattice QCD...
The current status and challenges of computing the spectrum of hadrons from lattice QCD are reviewed. While determinations of QCD-stable hadron
masses routinely achieve percent-level accuracy, the situation for resonances and shallow bound states is more difficult since they must be identified as poles in the scattering matrix analytically continued to complex center-of-mass energies. In...
High-energy electrons and photons are a remarkably clean probe of hadronic matter, essentially providing a microscope for examining atomic nuclei and the strong nuclear force. One of the most striking phenomena of Quantum Chromodynamics (QCD) is the formation of the nucleon out of massless gluons and almost massless quarks. This system of confined quarks and gluons serves as the basic...
Belle II, which commenced data acquisition in 2019, has already yielded research results in hadron spectroscopy. The $e^{+}e^{-}$ collision data, taken at or near the $\Upsilon(4S)$ resonance, are well-suited for studying hadrons with a high-performance detector system. In this presentation, we will show the latest research outcomes in hadron spectroscopy, including searches for the hidden...
The GlueX experiment, located in Jefferson Lab's Hall D, provides a unique capability to study the spectrum of hadrons in photoproduction, utilizing a high-energy, linearly polarized photon beam. An overview of results from the initial phase of GlueX, completed in 2018, will be presented with unprecedented statistics to study the production mechanisms of known hadrons as well as search for...
In order to connect predictions for the baryon spectrum in the non-perturbative energy regime from quark models or lattice calculations to experimental data, coupled-channel frameworks are especially suited. In those approaches a simultaneous partial-wave analysis of multiple reactions with different initial and final states is performed.
I will present recent results from the Juelich-Bonn...
Despite mesons being one of the longest known type of particles, there are still many open ques- tions. Besides well understood states that can be clearly attributed to meson nonets, there are many candidates which could have an exotic nature instead. Such exotic particles e.g. glueballs, hybrids and tetraquarks can be especially studied in clean, gluon-rich environments.
The BESIII...
KLOE and KLOE-2 collected the largest dataset (about 8 fb$^{-1}$) at an electron-positron collider operating at the peak of the $\phi(1020)$ resonance, corresponding to the production of about 24 billions of $\phi$ mesons, namely 8 billion pairs of neutral $K$ mesons and 300 millions of $\eta$ mesons. A wide hadron physics program, investigating fundamental symmetries, rare meson decays, and...
The Proton Radius Puzzle has been famously known as the discrepancy of the proton charge radius between measurements using the novel method of muonic hydrogen spectroscopy and the conventional methods of regular hydrogen spectroscopy and electron scattering. Suggested explanations have ranged from hidden experiment systematics through unaccounted effects in conventional theory to New Physics...
I will give an overview of the recent activities of the Joint Physics Analysis Center and the plans for the future.
The goal of the Muon g-2 experiment at Fermilab is to measure the muon anomalous magnetic moment to unprecedented precision of 140 parts per billion. In August 2023, the collaboration published the second measurement based on the data acquired during the second (Run-2) and third (Run-3) year of running. The new result is the most precise measurement of the muon magnetic anomaly and it...
The status of the standard model prediction for the muon g-2 at a level of precision comparable to its latest experimental measurement is reviewed and discussed
The Mainz Energy-Recovering Superconducting Accelerator, MESA, is currently under construction at the Institute of Nuclear Physics in Mainz.
Three experiments will be run there, allowing for a comprehensive physics programme to be conducted.
An external beamline will supply spin-polarized electrons to the P2 experiment, enabling the performance of sensitive tests of the Standard Model...
We will report on the latest measurements of the parity-violating asymmetry in the scattering of longitudinally polarized electrons off various nuclear targets. After a brief historical introduction, the implications of the PREX and CREX experiments will be discussed. We then report on the status of the development of new experiments and conclude with a brief discussion of measurements of such...
The perspective of high duty-cycle and high intensity polarized and unpolarized positron beams, in complement to the existing CEBAF (Continuous Electron Beam Accelerator Facility) 12 GeV electron beams, has been nurtured since the very first 6 GeV upgrade of the CEBAF accelerator. Along the years, experimental results about the electromagnetic form factors and the generalized parton...
I will discuss recent progress in the theoretical investigation of the partonic structure of the nucleon in terms of generalized parton distributions (GPDs) and transverse momentum dependent parton distributions (TMDs).
In particular, I will highlight the information encoded in these function on the spin and multidimensional partonic structure of the nucleon, discussing our present...
Quantum Chromodynamics describes the proton as a bound state of quarks and gluons. However, it is unclear whether the heavy quarks, i.e. quarks whose mass is larger than the proton mass, take part to the non perturbative dynamics of the proton. They are the so-called intrinsic heavy quarks. It has been discussed for a long time that the charm quark, that is the lightest heavy quark and its...
This talk will be focused on near-threshold exotic hadrons in the hidden-charm and double-charm sectors. For such systems, the separation of scales allows one to construct EFT as a framework to analyze both experimental and lattice QCD data. Insights into the structure of exotic states can be obtained.
The proton and neutron, known as nucleons, are the fundamental building blocks of all atomic nuclei that make up essentially all the visible matter in the universe. In Quantum Chromodynamics, nucleons have complex internal structures and emerge as strongly interacting and relativistic bound states of quarks and gluons, the dynamics of which are only beginning to be revealed in modern...
Information on the phase structure of strongly interacting matter at high baryon densities can be gained from observations of neutron stars and their detailed analysis. Bayesian inference methods are used to set constraints on the speed of sound in the interior of neutron stars, based on recent multimessenger data in combination with low-density constraints based on chiral effective field...
