Parton densities beyond perturbation theory
نویسندگان
چکیده
منابع مشابه
GRSV parton densities revisited
R = FL/2xF1, in longitudinally polarized DIS off various different targets (p, n, d) have become available in the past two years: E142, E143, and SMC have presented their final data sets [ 1], and new results from HERMES, E154, and E155 have been reported recently [ 2]. Since none of these measurements were included in our original NLO QCD analysis [ 3], it seems to be appropriate to reanalyse ...
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Generalized parton distributions provide a unified parameterization of hadron structure and allow one to combine information from many different observables. Lattice QCD calculations already provide important input to determine these distributions and hold the promise to become even more important in the future. To this end, a reliable extrapolation of lattice calculations to the physical quark...
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We complete the analysis of twist-two generalized parton distributions of the nucleon in one-loop order of heavy-baryon chiral perturbation theory. Extending our previous study of the chiral-even isosinglet sector, we give results for chiral-even isotriplet distributions and for the chiral-odd sector. We also calculate the one-loop corrections for the chiral-odd generalized parton distributions...
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We analyze the moments of the isosinglet generalized parton distributions H, E, H̃, Ẽ of the nucleon in one-loop order of heavy-baryon chiral perturbation theory. We discuss in detail the construction of the operators in the effective theory that are required to obtain all corrections to a given order in the chiral power counting. The results will serve to improve the extrapolation of lattice re...
متن کاملParton Densities in a Nucleon
In this paper we re-analyse the situation with the shadowing corrections (SC) in QCD for the proton deep inelastic structure functions. We reconsider the Glauber Mueller approach for the SC in deep inelastic scattering (DIS) and suggest a new nonlinear evolution equation. We argue that this equation solves the problem of the SC in the wide kinematic region where αS κ = αS 3παS 2QR xG(x,Q) ≤ 1. ...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1995
ISSN: 0550-3213
DOI: 10.1016/0550-3213(95)00393-7