Conveners
Wednesday: Wednesday 1
- Marc Schlegel (University of Tübingen)
Wednesday: Wednesday 2
- Krzysztof Cichy (Adam Mickiewicz University)
Wednesday: Wednesday 3
- Paul Hoyer (University of Helsinki)
We compute the matching of TMD distributions to collinear distributions of twist-2 and twist-3 to all powers of small-$b$ (large-$p_T$).
The computation is based on the operator product expansion of the non-local TMD operators.
For the first time, a non-trivial expression for the pretzelosity distribution is derived.
Effective chiral Lagrangian of nucleons and pions in external gravitational field and the corresponding energy-momentum tensor will be considered. Gravitational form factors of the nucleon and their relation to internal forces will be discussed.
In this contribution I will revisit GPD evolution in momentum space. I will highlight some fundamental properties of the evolution kernels and present a leading-order numerical implementation that quantitatively fulfils all these properties.
Deeply virtual Compton scattering (DVCS) is a particularly promising channel to extract generalized parton distributions (GPDs) allowing the study of the three-dimensional structure and the energy-momentum tensor of the nucleon. However, the access to GPDs from DVCS experimental data is complicated by the so-called deconvolution problem and the lack of precise data in some kinematic regions....
Generalized Parton Distributions (GPDs) describe the correlations between the longitudinal momentum and the transverse position of the partons inside the nucleon. They are nowadays the subject of an intense effort of research, in the perspective of understanding nucleon spin and mechanical properties.
In this talk, we present the first measurement of the Timelike Compton Scattering (TCS)...
Following simple large Nc arguments and perturbative QCD constraints complemented with uncertainty estimates based on the idea of meson dominance and the half-width rule, we describe the pseudoscalar form factors of the nucleon. We analyze their implications in the space-like region at intermediate and low energies and compare to recent lattice QCD determinations. Our analysis allows for a...
A lattice QCD determination of the nucleon sigma terms, which are closely related to the scalar charges of the nucleons, will be presented. These sigma terms determine the strength of the spin-independent interactions of nucleons with WIMPs searched for in direct dark matter detection experiments. They are also closely related to the masses of the nucleons. The calculation presented here is...
Generalized parton distributions (GPDs) are important quantities that characterize the structure of hadrons. They provide information about the partons’ momentum distribution and also on their distribution in position space. Most of the information from lattice QCD is on the Mellin moments of GPDs, namely form factors and their generalizations. Recent developments in calculations of matrix...
In the last few years, several new techniques for quantum many-body physics based on quantum information methods and concepts have been developed and applied. In one such approach, quantum simulation, an inaccessible physical model is mapped to another quantum device which can be manipulated and measured in the lab, hence serving as its simulator. In another one, by considering the special...
We present a first attempt to design a quantum circuit for the determination of the parton content of the proton through the estimation of parton distribution functions (PDFs), in the context of high energy physics (HEP). The growing interest in quantum computing and the recent developments of new algorithms and quantum hardware devices motivates the study of methodologies applied to HEP. In...
Quantum computers can efficiently simulate quantum field theory observables. Basis light front quantized systems have been modeled for meson states using confining effective field theory. Some form factors and parton distributions were obtained from an available quantum computer not yet able to implement error correction – a NISQ device. The procedure will be outlined and some early results shown.