Quarks in Few Body Nuclei

Roy J Holt,C Elster,C.D Roberts,D.R Phillips

doi:10.1051/epjconf/201611305011

Abstract

Electron scattering at very high Bjorken x from hadrons provides an excellent test of models, has an important role in high energy physics, and from nuclei, provides a window into short range correlations. Light nuclei have a key role because of the relatively well-known nuclear structure. The development of a novel tritium target for Jefferson Lab has led to renewed interest in the mass three system. For example, deep inelastic scattering experiments in the light nuclei provide a powerful means to determine the neutron structure function. The isospin dependence of electron scattering from mass-3 nuclei provide information on short range correlations in nuclei. The program using the new tritium target will be presented along with a summary of other experiments aimed at revealing the large-x structure of the nucleon.

Highlights

During the past decades there has been an enormous effort to determine the parton distribution functions (PDFs) of the most stable hadrons: neutron, proton and pion [1]
One of the new experiments required the development of a tritium target for JLab, which led to new planned experiments
Theoretical calculations [5,6,7,8,9,10,11,12] of the pion structure function have demonstrated the success of the nonperturbative approach in QCD

Summary

Introduction

During the past decades there has been an enormous effort to determine the parton distribution functions (PDFs) of the most stable hadrons: neutron, proton and pion [1]. The high-x region could impact high energy physics since low momentum transfer and high x evolves to high momentum transfer and low x. This talk will focus on three main areas of research at JLab: first, the planned measurements of the F2n/F2p and d/u ratios as well as present status; secondly, measurements of the longitudinal spin asymmetries for the proton and neutron, and third, the planned measurements that will make use of the new low-activity tritium target developed for JLab

Status of high-x experiments

Longitudinally polarized deep inelastic scattering at high x

New studies in the mass-3 system

Findings

Summary