Updates of PDFs in the MMHT framework
R.S. Thorne, S. Bailey, T. Cridge, L.A. Harland-Lang, A.D. Martin, R., Nathvani
TL;DR
This paper discusses recent advancements in the MMHT framework for parton distribution functions, focusing on strange quark extraction, parameterisation extension, and correlated uncertainties in data fitting.
Contribution
It introduces updates to the MMHT19 PDFs, including improved strange quark extraction, extended parameterisation, and analysis of correlated uncertainties.
Findings
Enhanced strange quark determination at NNLO
Extended parameterisation improves fit quality
Correlated uncertainties impact data fitting accuracy
Abstract
We summarise recent developments in the path towards the "MMHT19" parton distribution functions. We concentrate on the extraction of the strange quark upon the improvement of theoretical calculations for NNLO charged current cross sections; the effect of an extension of our parameterisation; and the role of correlated uncertainties in some data sets which prove difficult to fit.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Computational Physics and Python Applications