Measurements of F_{2} and R=\sigma_{L}/\sigma_{T} on Nuclear Targets in the Nucleon Resonance Region

TL;DR

This experiment measured the structure functions F2 and R on nuclear targets in the nucleon resonance region to improve understanding of quark-hadron duality and aid neutrino oscillation research.

Contribution

It provides precise measurements of F2 and R on nuclear targets in the resonance region, aiding future neutrino and nuclear structure studies.

Findings

Data spans 0.5 < Q^2 < 4.5 GeV^2 and 1 < W^2 < 4 GeV^2.

Targets include C, Al, Fe, Cu, enhancing nuclear data.

Results support models of quark-hadron duality in nuclei.

Abstract

Jefferson Lab Experiment E04-001 used the Rosenbluth technique to measure R=\sigma_{L}/\sigma_{T} and F_{2} on nuclear targets. This experiment was part of a multilab effort to investigate quark-hadron duality and the electromagnetic and weak structure of the nuclei in the nucleon resonance region. In addition to the studies of quark-hadron duality in electron scattering on nuclear targets, these data will be used as input form factors in future analysis of neutrino data which investigate quark-hadron duality of the nucleon and nuclear axial structure functions. An important goal of this experiment is to provide precise data which to allow a reduction in uncertainties in neutrino oscillation parameters for neutrino oscillation experiments (K2K, MINOS). This inclusive experiment was completed in July 2007 at Jefferson Lab where the Hall C High Momentum Spectrometer detected the scattered electron. Measurements were done in the nuclear resonance region (1 < W^{2} < 4 GeV^{2}) spanning the four-momentum transfer range 0.5 < Q^{2} < 4.5 (GeV^{2}). Data was collected from four nuclear targets: C, Al, Fe and Cu.