Conveners
Unraveling the Nucleon's Collinear Structure
- Lamiaa El Fassi (Mississippi State U.)
Description
co-host: Tim Hobbs
Collinear Parton Distribution Functions of the nucleon continue to be a very active field of theoretical and experimental research. Because of their universality, they can be extracted from - and affect the interpretation of - a wide range of experiments: hadron collisions, Drell-Yan and W production, and Deep Inelastic Scattering. A rich experimental program is underway at high-energy...
We present a new global QCD analysis of spin-averaged and spin-dependent PDFs from high-$x$ DIS and $W$ production data using a Monte Carlo approach. This analysis includes the first extraction of the helicity-dependent antiquark asymmetry $\Delta \bar{u} - \Delta \bar{d}$ using $W$ production data in $\vec{p} p$ collisions at RHIC. We also focus on the high-$x$, low-$W$ region, where...
We present an impact study of future EIC measurements on our knowledge of PDFs, using the JAM Monte Carlo global QCD analysis framework. We study the effect of EIC pseudo-data for polarization asymmetries on quark and gluon helicity distributions in the proton. An overview of the impact of future inclusive DIS and parity-violating DIS data on unpolarized PDFs is also shown.
Two new extractions of the QCD coupling constant at the Z pole, $\alpha_S(m_Z)$, will be presented from detailed comparisons of inclusive W and Z hadronic decays data to state-of-the-art perturbative Quantum Chromodynamics calculations at next-to-next-to-next-to-leading order (N$^{3}$LO) accuracy, incorporating the latest experimental and theoretical developments. In the W boson case, the...
We develop a non-perturbative model for valence PDFs based on the quark interactions in the mean field of the nucleonic interior. The model is based on the separation of valence 3q system from the residual system which is the source of the mean field. The PDFs are calculated within effective light-front diagrammatic approach which allows to introduce light-front valence quark and residual wave...
