A model for the parton distributions in hadrons

Abstract

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. Starting from a low Q^2 scale, the distributions are evolved with next-to-leading order DGLAP and give the proton structure function F2(x,Q^2) in good agreement with deep inelastic scattering data.

12 pages, Latex, 5 figures. Added discussion on the applicability of the model at small Q^2. Figure 3 modified to show smaller Q^2

Cited by in corpus (20)

• Parton-distribution functions for the pion and kaon in the gauge-invariant nonlocal chiral-quark model
• Strange / anti-strange asymmetry in the nucleon sea
• On the phenomenological analyses of $s$-$\bar{s}$ asymmetry in the nucleon sea
• Quark asymmetries in the proton from a model for parton densities
• Strange quark asymmetry in the nucleon and the NuTeV anomaly
• Interpretation of electron-proton scattering at low Q^2
• Intrinsic charm in the nucleon and charm production at large rapidities in collinear, hybrid and $k_T$-factorization approaches
• The $bard-\bar{u}$ asymmetry of the proton in a Pion Cloud Model approach
• Impact of the LHCb $p+{}^{4}He$ fixed-target $D^0/\overline{D^0}$ data on the intrinisic $c\bar{c}$ component in the nucleon
• The s-s(bar) asymmetry in nucleon and "NuTeV anomaly"
• Gluon distributions in nucleons and pions at a low resolution scale
• A model for parton distributions in hadrons
• A Model for the Parton Distribution in Nuclei
• How the nuclear Fermi motion plus a simple statistical model explains the EMC effect
• Low $Q^2$ wave-functions of pions and kaons and their parton distribution functions
• Octet and decuplet contribution to the proton self energy
• Electromagnetic stress on nucleon structure
• The Single Particle Sum Rules in the Deep-Inelastic Region
• Nucleon parton distributions from hadronic quantum fluctuations
• Summary of the Structure Function Working Group at DIS'99