7 papers
Global QCD analysis of spin PDFs in the proton with high- and lattice constraints
C. Cocuzza, N. T. Hunt-Smith, W. Melnitchouk +2
We perform a comprehensive global QCD analysis of spin-dependent parton distribution functions (PDFs), combining all available data on inclusive and semi-inclusive deep-inelastic s…
First study of polarized proton-proton scattering with small- helicity evolution
Daniel Adamiak, Nicholas Baldonado, Yuri V. Kovchegov +7
We perform a phenomenological study of helicity-dependent parton distribution functions (PDFs) using small- helicity evolution equations, incorporating for the first time single…
Comment on "QCD factorization with multihadron fragmentation functions"
D. Pitonyak, C. Cocuzza, A. Metz +2
We make several comments on the recent work in Ref.~\cite{Rogers:2024nhb} while also reaffirming and adding to the work in Ref.~\cite{Pitonyak:2023gjx}. We show that the factorizat…
Strangeness in the proton from W+charm production and SIDIS data
Trey Anderson, W. Melnitchouk, N. Sato
We perform a global QCD analysis of unpolarized parton distribution functions (PDFs) in the proton, including new \,charm production data from collisions at the LHC and s…
Kernel methods for evolution of generalized parton distributions
A. Freese, D. Adamiak, I. Cloët +4
Generalized parton distributions (GPDs) characterize the 3-dimensional structure of hadrons, combining information about their internal quark and gluon longitudinal momentum distri…
Constraints on the model from global QCD analysis
X. G. Wang, N. T. Hunt-Smith, W. Melnitchouk +2
We perform the first global QCD analysis of electron-nucleon deep-inelastic scattering and related high-energy data including the beyond the Standard Model gauge boson…
On the resolution of the sign of gluon polarization in the proton
N. T. Hunt-Smith, C. Cocuzza, W. Melnitchouk +3
Recently the possible existence of negative gluon helicity, , has been observed to be compatible with existing empirical constraints, including from jet production in polarized…