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.

arXiv comment15 pages, 4 figures. Fit form changed to include Cahn effect Minor revisions. Added one new figure

References in corpus (22)

• Time-reversal odd distribution functions in leptoproduction
• The complete tree-level result up to order $1/Q$ for polarized deep-inelastic leptoproduction
• Semi-inclusive deep inelastic scattering at small transverse momentum
• QCD Factorization for Spin-Dependent Cross Sections in DIS and Drell-Yan Processes at Low Transverse Momentum
• Measurement of the Neutron Spin Structure Function $g_1^n$ with a Polarized ^3He Target
• Measurements of the $Q^2$-Dependence of the Proton and Neutron Spin Structure Functions g1p and g1n
• Mid-Rapidity Neutral Pion Production in Proton-Proto Collisions at sqrt(s_NN) = 200 GeV
• Cross Sections and Transverse Single-Spin Asymmetries in Forward Neutral-Pion Production from Proton Collisions at \sqrt{s} = 200 GeV
• Modelling quark distribution and fragmentation functions
• The role of Cahn and Sivers effects in Deep Inelastic Scattering
• Measurement of the Proton Spin Structure Function g1p with a Pure Hydrogen Target
• Measurement of the Deuteron Spin Structure Function g_1^d(x) for 1 (GeV/c)^2 < Q^2 < 40 (GeV/c)^2
• Gluon-Exchange in Spin-Dependent Fragmentation
• Measurement of the Proton and Deuteron Spin Structure Functions g2 and Asymmetry A2
• Semi-Inclusive Deep Inelastic Scattering processes from small to large P_T
• Angular dependences in electroweak semi-inclusive leptoproduction
• Determination of the Deep Inelastic Contribution to the Generalised Gerasimov-Drell-Hearn Integral for the Proton and Neutron
• Quark correlation functions in deep inelastic semi-inclusive processes
• QED Radiative Corrections in Processes of Exclusive Pion Electroproduction
• The Onset of Quark-Hadron Duality in Pion Electroproduction
• From Marginal Deformations to Confinement
• Understanding the role of Cahn and Sivers effects in Deep Inelastic Scattering

Cited by in corpus (34)

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• Investigations into the flavor dependence of partonic transverse momentum
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• Intrinsic transverse parton momenta in deeply inelastic reactions
• Measurement of Single and Double Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target
• The Boer-Mulders effect in unpolarized SIDIS: an analysis of the COMPASS and HERMES data on the $\cos 2\varphi$ asymmetry
• Transverse Momentum Dependent Fragmentation and Quark Distribution Functions from the NJL-jet Model
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• Transverse-momentum dependent parton distribution functions beyond leading twist in quark models
• Transverse spin effects in hard semi-inclusive collisions
• Effects of TMD evolution and partonic flavor on $e^{+}{e}^{-}$ annihilation into hadrons
• Transverse Momentum Dependent Parton Distribution/Fragmentation Functions at an Electron-Ion Collider
• Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive ${\pi }^0$ production
• 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
• Semi-Inclusive Charged-Pion Electroproduction off Protons and Deuterons: Cross Sections, Ratios and Access to the Quark-Parton Model at Low Energies
• Monte Carlo Simulations of Hadronic Fragmentation Functions using NJL-Jet Model
• $\cos 2\varphi$ asymmetries in unpolarized semi-inclusive DIS
• Boer-Mulders function of the pion in the MIT bag model
• Transverse momentum dependent twist-three result for polarized Drell-Yan processes
• Unpolarized structure functions at Jefferson Lab
• Duality in semi-inclusive pion electroproduction
• The $\sin 2\varphi$ azimuthal asymmetry in single longitudinally polarized $\pi N$ Drell-Yan process
• The Aerogel Cherenkov Detector for the SHMS magnetic spectrometer in Hall C at Jefferson Lab
• 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
• Nuclear dependences of azimuthal asymmetries in the Drell-Yan process
• Parton distributions and $\cos 2{\varphi }_h$ asymmetry induced by anomalous photon-quark coupling