Measurement of R = sigma_L / sigma_T and the Separated Longitudinal and Transverse Structure Functions in the Nucleon Resonance Region

2004/10/19 by Y. Liang, 110 Collaboration, V. Tvaskis +174
Physics and Astronomy · #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #nucl-ex

paper · pdf · doi:10.48550/arxiv.nucl-ex/0410027

5 pages, 4 figures

arxiv created 2013/01/08 · arxiv updated 2013/08/12

Abstract

We report on a detailed study of longitudinal strength in the nucleon resonance region, presenting new results from inclusive electron-proton cross sections measured at Jefferson Lab Hall C in the four-momentum transfer range 0.2 < Q² < 5.5 GeV². The data have been used to accurately perform 167 Rosenbluth-type longitudinal / transverse separations. The precision R = sigma_L / sigma_T data are presented here, along with the first separate values of the inelastic structure functions F₁ and F_L in this regime. The resonance longitudinal component is found to be significant, both in magnitude and in the existence of defined mass peaks. Additionally, quark-hadron duality is here observed above Q² = 1 GeV² in the separated structure functions independently.

Related

• Measurements of F₂ and R=σ_L/σ_T on Nuclear Targets in the Nucleon Resonance Region
• Investigation of Medium Modifications to ¹²C Structure Functions in the Resonance Region
• Partonic structure of proton in the resonance region
• The Behavior of Form Factors of Nucleon Resonances and Quark-Hadron Duality
• Measurement of the longitudinal structure function of the proton, FL