Results 21 to 30 of about 2,008 (184)
Double parton distributions out of bounds in colour space
European Physical Journal C: Particles and Fields, 2021 We investigate the positivity of double parton distributions with a non-trivial dependence on the parton colour. It turns out that positivity is not preserved by leading-order evolution from lower to higher scales, in contrast to the case in which parton
M. Diehl +3 more
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Journal of High Energy Physics, 2023 Multi-parton distributions in a proton, the nonperturbative quantities needed to make predictions for multiple scattering rates, are poorly constrained from theory and data and must be modelled.
Oleh Fedkevych, Jonathan R. Gaunt
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GENERALIZED PARTON DISTRIBUTIONS AND DISTRIBUTION OF PARTONS IN THE TRANSVERSE PLANE [PDF]
Lepton Scattering, Hadrons and QCD, 2001 invited talk at `Workshop on Lepton Scattering, Hadrons and QCD', Adelaide, March 26 - April 6, 2001, 8 pages, sprocl ...
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, 2022 We discuss the determination of the parton substructure of hadrons by casting it as a peculiar form of pattern recognition problem in which the pattern is a probability distribution, and we present the way this problem has been tackled and solved. Specifically, we review the NNPDF approach to PDF determination, which is based on the combination of a ...
Forte S., Carrazza S.
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The multidimensional nucleon structure
EPJ Web of Conferences, 2016 We discuss different kinds of parton distributions, which allow one to obtain a multidimensional picture of the internal structure of the nucleon.
Pasquini Barbara, Lorcé Cédric
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Nonforward parton distributions [PDF]
Physical Review D, 1997 Applications of perturbative QCD to deeply virtual Compton scattering and hard exclusive electroproduction processes require a generalization of usual parton distributions for the case when long-distance information is accumulated in nonforward matrix elements of quark and gluon light-cone operators.
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Parton distribution functions [PDF]
Nuclear Physics B - Proceedings Supplements, 1997 Parton distribution functions give the probability to find partons (quarks and gluons) in a hadron as a function of the fraction x of the proton's momentum carried by the parton. They are conventionally defined in terms of matrix elements of certain operators.
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Generalized Parton Distributions in the Deuteron [PDF]
Physical Review Letters, 2001 We introduce generalized quark and gluon distributions in the deuteron, which can be measured in exclusive processes like deeply virtual Compton scattering and meson electroproduction. We discuss the basic properties of these distributions, and point out how they probe the interplay of nucleon and parton degrees of freedom in the deuteron wave function.
Berger, Edgar R. +3 more
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Sum rule improved double parton distributions in position space
European Physical Journal C: Particles and Fields, 2020 Models for double parton distributions that are realistic and consistent with theoretical constraints are crucial for a reliable description of double parton scattering.
M. Diehl +4 more
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PARTON DISTRIBUTIONS – DIS06 [PDF]
Deep Inelastic Scattering DIS 2006, 2007 8 pages, 7 figures included as .ps or .eps files.
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