Measurement of the cross sections for inclusive electron scattering in the E12-14-012 experiment at Jefferson Lab

M Murphy ,S Covrig Dusa ,C M Jen ,J.-P Chen ,J Bane ,S Li ,Vincenzo Bellini ,A Camsonne ,D Meekins ,T Gautam ,R Michaels ,M E Christy ,G D N Perera ,B Aljawrneh ,D Day ,S Alsalmi ,C Giusti ,V Pandey ,L Gu ,D Abrams ,R Lindgren ,D Nguyen ,Ye Tian ,J.‐O Hansen ,R E Mcclellan ,T Hague ,K Park ,S A Wood ,Artur M Ankowski ,M Mihovilovič ,T Su ,Omar Benhar ,N Ton ,D Biswas ,D W Higinbotham ,Z Ye ,J Gómez ,Li Ou ,B Wojtsekhowski ,L Tang ,F Hauenstein ,J Castillo Castellanos ,A J R Puckett ,S N Santiesteban ,R Cruz-Torres ,C Keppel ,H Liu ,E Fuchey ,J Beričič ,C Mariani ,B Pandey ,Hongxia Dai ,S Širca ,K Craycraft ,S Barcus ,C.d Gu ,M Nycz ,C Hyde ,J Zhang

doi:10.1103/physrevc.100.054606

Abstract

The E12-14-012 experiment performed at Jefferson Lab Hall A has collected inclusive electron-scattering data for different targets at the kinematics corresponding to beam energy 2.222 GeV and scattering angle 15.54 deg. Here we present a comprehensive analysis of the collected data and compare the double-differential cross sections for inclusive scattering of electrons, extracted using solid targets (aluminum, carbon, and titanium) and a closed argon-gas cell. The data extend over broad range of energy transfer, where quasielastic interaction, Delta-resonance excitation, and inelastic scattering yield contributions to the cross section. The double-differential cross sections are reported with high precision (~3%) for all targets over the covered kinematic range.

Highlights

Allowing the nuclear response to be probed at energy transfers varied independently from momentum transfers, electron beams can be used to investigate physics corresponding to various excitation energies with different spatial resolutions, exposing to different interaction mechanisms
[11,12], we reported the inclusive cross sections for electron scattering off argon, titanium, and carbon, extracted for beam energy 2.222 GeV and scattering angle 15.54◦
E12-14-012 used an electron beam of energy 2.222 GeV provided by the Continuous Electron Beam Accelerator Facility (CEBAF) and took data in Spring 2017

Summary

Introduction

Electron-scattering experiments have been shown to be the best tool for precise investigations of the structure of atomic. The existing body of electron-scattering data clearly shows that many important features of nuclear structure can be described by assuming that nucleons forming the nucleus behave as independent particles bound in a mean field [2], but this picture is not complete without accounting for correlations between nucleons [3,4,5]

Methods

Results

Conclusion