Transverse momentum dependence of semi-inclusive pion production

Abstract

Cross sections for semi-inclusive electroproduction of charged pions (${\pi }^{\pm }$) from both proton and deuteron targets were measured for $0.2<x<0.5$, $2<Q^2<4$ GeV${}^2$, $0.3<z<1$, and $P_t^2<0.2$ GeV${}^2$. For $P_t<0.1$ GeV, we find the azimuthal dependence to be small, as expected theoretically. For both ${\pi }^{+}$ and ${\pi }^{-}$, the $P_t$ dependence from the deuteron is found to be slightly weaker than from the proton. In the context of a simple model, this implies that the initial transverse momenta width of $d$ quarks is larger than for $u$ quarks and, contrary to expectations, the transverse momentum width of the favored fragmentation function is larger than the unfavored one.

15 pages, 4 figures. Fit form changed to include Cahn effect Minor revisions. Added one new figure

References in corpus (3)

• Semi-Inclusive Deep Inelastic Scattering processes from small to large P_T
• The Onset of Quark-Hadron Duality in Pion Electroproduction
• From Marginal Deformations to Confinement

Cited by in corpus (14)

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• Parton Fragmentation Functions
• Distribution Functions of the Nucleon and Pion in the Valence Region
• Measurement of Single and Double Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target
• Naive time-reversal odd phenomena in semi-inclusive deep-inelastic scattering from light-cone constituent quark models
• Transverse-momentum dependent parton distribution functions beyond leading twist in quark models
• Where do we stand with a 3-D picture of the proton?
• Leading and higher twist contributions in semi-inclusive e+e- annihilation at high energies
• Monte Carlo Simulations of Hadronic Fragmentation Functions using NJL-Jet Model
• $\cos 2\varphi$ asymmetries in unpolarized semi-inclusive DIS
• Spin Orbit Correlations and the Structure of the Nucleon
• Studies of Transverse Momentum Dependent Parton Distributions and Bessel Weighting
• The $\sin 2{\varphi }_h$ azimuthal asymmetry of pion production in SIDIS within TMD factorization