New analysis concerning the strange quark polarization puzzle

Abstract

The fact that analyses of semi-inclusive deep inelastic scattering suggest that the polarized strange quark density $\Delta s(x)+\Delta \bar{s}(x)$ is positive in the measured region of Bjorken x, whereas all analyses of inclusive deep inelastic scattering yield significantly negative values of this quantity, is known as the "strange quark polarization puzzle". We have analyzed the world data on inclusive deep inelastic scattering, including the COMPASS 2010 proton data on the spin asymmetries, and for the first time, the new extremely precise JLab CLAS data on the proton and deuteron spin structure functions. Despite allowing in our parametrization, for a possible sign change, our results confirm that the inclusive data yield significantly negative values for the polarized strange quark density.

8 pages, 3 figures, 3 tables; misprints for the values of ${\chi }^2/DOF$ in page 5 corrected

References in corpus (10)

• Global analysis of fragmentation functions for pions and kaons and their uncertainties
• Extraction of Spin-Dependent Parton Densities and Their Uncertainties
• The Deuteron Spin-dependent Structure Function g1d and its First Moment
• Global Analysis of Fragmentation Functions for Protons and Charged Hadrons
• Determination of fragmentation functions and their uncertainties
• Multiplicities of charged pions and kaons from semi-inclusive deep-inelastic scattering by the proton and the deuteron
• QCD Analysis of the Polarized World Data
• Determination of gluon polarization from deep inelastic scattering and collider data
• Impact of CLAS and COMPASS data on Polarized Parton Densities and Higher Twist
• A Possible Resolution of the Strange Quark Polarization Puzzle ?

Cited by in corpus (11)

• Parton Fragmentation Functions
• Parton Distributions in Nucleons and Nuclei
• Small-$x$ asymptotics of the quark helicity distribution
• First Monte Carlo analysis of fragmentation functions from single-inclusive $e^{+}{e}^{-}$ annihilation
• Flavor decomposition of the nucleon unpolarized, helicity and transversity parton distribution functions from lattice QCD simulations
• Structure of the nucleon at leading and subleading twist in the covariant parton model
• Study of spin-dependent structure functions of ${}^3\mathrm{He}$ and ${}^3\mathrm{H}$ at NNLO approximation and corresponding nuclear corrections
• Parton distribution functions with QED corrections in the valon model
• Effect of symmetry breaking of polarized light sea quarks on the nucleon and nuclear structure functions, and sum rules
• Helicity-dependent distribution of strange quarks in the proton from nonlocal chiral effective theory
• AAK24: Global QCD analysis on polarized parton distribution in the presence of $A_2$ asymmetry measurements