Results 31 to 40 of about 903,040 (213)
PARTON DISTRIBUTION FUNCTIONS IN NUCLEI [PDF]
Deep Inelastic Scattering, 2002 Optimum nuclear parton distributions are determined by an analysis of muon and electron deep inelastic scattering data. Assuming simple A dependence and polynomial functions of x and 1-x for nuclear modification of parton distributions, we determine the initial distributions by a chi^2 analysis.
Hirai, M., Kumano, S., Miyama, M.
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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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Nuclear parton distribution functions [PDF]
Nuclear Physics B - Proceedings Supplements, 2009 We study nuclear effects of charged current deep inelastic neutrino-iron scattering in the framework of a chi^2 analysis of parton distribution functions (PDFs). We extract a set of iron PDFs which are used to compute x_Bj-dependent and Q^2-dependent nuclear correction factors for iron structure functions which are required in global analyses of free ...
Schienbein, I. +5 more
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Parton Distribution Functions and Lattice QCD [PDF]
EPJ Web of Conferences, 2019 Recently, there have been rapid developments in lattice-QCD calculations of proton structure, especially in the parton distribution functions (PDFs). We overcame a longstanding obstacle and for the first time in lattice-QCD are able to directly calculate
Lin Huey-Wen
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Distribution functions for partons in nuclei [PDF]
Physical Review C, 2005 We suggest that a previously conjectured relation between Structure Functions (SF) for nuclei and nucleons also links distribution functions (df) for partons in a nucleus and in nucleons. The above suggestion ensures in principle identical results for SF $F_2^A$, whether computed with hadronic or partonic degrees of freedom.
Rinat, A. S., Taragin, M. F.
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Neural-network analysis of Parton Distribution Functions from Ioffe-time pseudodistributions [PDF]
Journal of High Energy Physics, 2020 We extract two nonsinglet nucleon Parton Distribution Functions from lattice QCD data for reduced Ioffe-time pseudodistributions. We perform such analysis within the NNPDF framework, considering data coming from different lattice ensembles and dis ...
L. Del Debbio +5 more
semanticscholar +1 more source
Transverse-momentum-dependent parton distribution functions for spin-1 hadrons
SciPost Physics Proceedings, 2022 We show transverse-momentum-dependent parton distribution functions (TMDs) for spin-1 hadrons including twist-3 and 4 functions by taking the decomposition of a quark correlation function in the Lorentz-invariant way with the conditions of Hermiticity
S. Kumano, Qin-Tao Song
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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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Polarized parton distribution functions reexamined [PDF]
Physical Review D, 1996 17 pages, 9 figures. Main changes: (i) all polarized parton distributions are parametrized and determined in the MS scheme, (ii) all figures are ...
Cheng, Hai-Yang +2 more
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Nucleon quasi-parton distributions in the large Nc limit
Physics Letters B, 2020 In this letter, we investigate the nucleon quasi-parton distribution functions in the chiral quark soliton model. We derive a set of sum-rules depending on the velocity of the nucleon and on the Dirac matrix defining the distribution functions.
Hyeon-Dong Son +2 more
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