Charged pion form factor between Q^2=0.60 and 2.45 GeV^2. II. Determination of, and results for, the pion form factor

Abstract

The charged pion form factor, Fpi(Q^2), is an important quantity which can be used to advance our knowledge of hadronic structure. However, the extraction of Fpi from data requires a model of the 1H(e,e'pi+)n reaction, and thus is inherently model dependent. Therefore, a detailed description of the extraction of the charged pion form factor from electroproduction data obtained recently at Jefferson Lab is presented, with particular focus given to the dominant uncertainties in this procedure. Results for Fpi are presented for Q^2=0.60-2.45 GeV^2. Above Q^2=1.5 GeV^2, the Fpi values are systematically below the monopole parameterization that describes the low Q^2 data used to determine the pion charge radius. The pion form factor can be calculated in a wide variety of theoretical approaches, and the experimental results are compared to a number of calculations. This comparison is helpful in understanding the role of soft versus hard contributions to hadronic structure in the intermediate Q^2 regime.

18 pages, 11 figures

References in corpus (9)

• Light-Front Dynamics and AdS/QCD Correspondence: The Pion Form Factor in the Space- and Time-Like Regions
• Structure of Vector Mesons in Holographic Model with Linear Confinement
• Charged pion form factor between $Q^2$=0.60 and 2.45 GeV${}^2$. I. Measurements of the cross section for the ${}^1$H($e,e^{\prime }{\pi }^{+}$)$n$ reaction
• Pion Form Factor in Chiral Limit of Hard-Wall AdS/QCD Model
• Pion Form Factors in Holographic QCD
• Pion Form Factor in Improved Holographic QCD Backgrounds
• Pion form factor at spacelike momentum transfers from local-duality QCD sum rule
• Role of the rho meson in the description of pion electroproduction experiments at JLab
• Sea-quark effects in the pion charge form factor

Cited by in corpus (4)

• Charged pion form factor between $Q^2$=0.60 and 2.45 GeV${}^2$. I. Measurements of the cross section for the ${}^1$H($e,e^{\prime }{\pi }^{+}$)$n$ reaction
• Electromagnetic form factor of the pion from twisted-mass lattice QCD at Nf=2
• Singular Charge Density at the Center of the Pion?
• QCD sum rules with nonlocal condensates and the spacelike pion form factor