A model for the parton distributions in hadrons
نویسندگان
چکیده
منابع مشابه
A model for the parton distributions in hadrons
A simple model is presented for the parton distributions in hadrons. The parton momenta in the hadron rest frame are derived from a spherically symmetric, Gaussian, distribution having a width motivated by the Heisenberg uncertainty relation applied to the hadron size. Valence quarks and gluons originate from the ‘bare’ hadron, while sea partons arise mainly from pions in hadronic fluctuations....
متن کاملRadiatively Generated Parton Distributions of Polarized Hadrons and Photons*
A next-to-leading order QCD analysis of spin asymmetries and structure functions in polarized deep inelastic lepton nucleon scattering is presented within the framework of the radiative parton model. The Q-dependence of the spin asymmetry Ap1(x,Q ) is shown to be nonnegligible for x-values relevant for the analysis of the present data. In the second part of the paper we present LO results for r...
متن کاملOn Dynamical Parton Distributions of Hadrons and Photons *
The basic concepts and predictions of the ‘dynamical’ GRV parton distributions for hadrons and photons are discussed. Comparisons of these predictions with recent experimental results, especially from HERA, are presented.
متن کاملGeneralized parton distributions of hadrons with composite constituents
A method is described for calculating the Generalized Parton Distributions (GPDs) of spin 1/2 hadrons made of composite constituents, in an Impulse Approximation framework. GPDs are obtained from the convolution between the light cone non-diagonal momentum distribution of the hadron and the GPD of the constituent. DIS structure functions and electromagnetic form factors are consistently recover...
متن کاملA toy model for generalised parton distributions
We give the results of a simple model for the diagonal and off-diagonal valence quark distributions of a pion. We show that structure can be implemented in a gauge-invariant manner. This explicit model questions the validity of the momentum sum rule, and gives an explicit counter-example to the WandzuraWilczek ansatz for twist-3 GPD’s.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 1998
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(98)00659-5