Global analysis on determination of fracture functions considering sea quark asymmetries in the nucleon

Abstract

Several experiments at the electron-proton ($ep$) collider HERA have collected high precision data on the spectrum of leading-proton and leading-neutron carrying a large fraction of the proton's energy. In this paper, we have analyzed recent experimental data on the production of leading-nucleon in deep inelastic scattering (DIS) processes at HERA in the framework of a perturbative QCD (pQCD). An approach based on the fractures functions framework has been used, and the nucleon fracture functions (nucleon FFs) ${\mathcal{M}}_2^{(n/p)}(x,Q^2,x_L)$ have been extracted from global QCD analysis of DIS data measured by ZEUS collaboration at HERA. We show that the approach of fracture functions formalisem allows us phenomenologically parametrize the nucleon FFs at the input scale, $Q_0^2$. Considering leading-nucleon production data in the DIS processes, we present the results for the separate parton distributions for all parton species. The extracted results from the $t$-integrated leading-baryon fracture functions, $F_2^{\mathrm{LB}(3)}(x,Q^2,x_L)$ are in good agreement with all DIS data analyzed, for a wide range of longitudinal momentum fraction $x_L$ as well as scaled fractional momentum variable $x$.

arXiv commentTalk presented at XVII International Conference on Hadron Spectroscopy and Structure, September 25th-29th 2017, Salamanca, Spain

References in corpus (17)

• Parton distributions for the LHC
• QCDNUM: Fast QCD Evolution and Convolution
• Leading proton production in deep inelastic scattering at HERA
• Dynamical parton distributions of the nucleon and very small-x physics
• A Critical Appraisal and Evaluation of Modern PDFs
• Global analysis of nuclear parton distribution functions and their uncertainties at next-to-next-to-leading order
• Measurement of Leading Neutron Production in Deep-Inelastic Scattering at HERA
• Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry
• Analytic derivation of the next-to-leading order proton structure function $F_2^p(x,Q^2)$ based on the Laplace transformation
• Next-to-next-to-leading order QCD analysis of spin-dependent parton distribution functions and their uncertainties: Jacobi polynomials approach
• Nucleon spin structure functions at NNLO in the presence of target mass corrections and higher twist effects
• QCD analysis of nucleon structure functions in deep-inelastic neutrino-nucleon scattering: Laplace transform and Jacobi polynomials approach
• First determination of $D^{\ast +}$-meson fragmentation functions and their uncertainties at next-to-next-to-leading order
• Study of spin-dependent structure functions of ${}^3\mathrm{He}$ and ${}^3\mathrm{H}$ at NNLO approximation and corresponding nuclear corrections
• Determination of neutron fracture functions from a global QCD analysis of leading neutron production at HERA
• Phenomenology of leading nucleon production in $ep$ collisions at HERA in the framework of fracture functions
• QCD analysis of forward neutron production in DIS