Measurements of Non-Singlet Moments of the Nucleon Structure Functions and Comparison to Predictions from Lattice QCD for $Q^2 = 4$ $\rm GeV^2$

Academic Article

Abstract

  • We present extractions of the nucleon non-singlet moments utilizing new precision data on the deuteron $F_2$ structure function at large Bjorken-$x$ determined via the Rosenbluth separation technique at Jefferson Lab Experimental Hall C. These new data are combined with a complementary set of data on the proton previously measured in Hall C at similar kinematics and world data sets on the proton and deuteron at lower $x$ measured at SLAC and CERN. The new Jefferson Lab data provide coverage of the upper third of the $x$ range, crucial for precision determination of the higher moments. In contrast to previous extractions, these moments have been corrected for nuclear effects in the deuteron using a new global fit to the deuteron and proton data. The obtained experimental moments represent an order of magnitude improvement in precision over previous extractions using high $x$ data. Moreover, recent exciting developments in Lattice QCD calculations provide a first ever comparison of these new experimental results with calculations of moments carried out at the physical pion mass, as well as an innovative approach which first calculates the quark distributions directly before determining moments.
  • Authors

  • Albayrak, I
  • Mamyan, V
  • Christy, ME
  • Ahmidouch, A
  • Arrington, J
  • Asaturyan, A
  • Bodek, A
  • Bosted, P
  • Bradford, R
  • Brash, E
  • Bruell, A
  • Butuceanu, C
  • Coleman, SJ
  • Commisso, M
  • Connell, SH
  • Dalton, MM
  • Danagoulian, S
  • Daniel, A
  • Day, DB
  • Dhamija, S
  • Dunne, J
  • Dutta, D
  • Ent, R
  • Gaskell, D
  • Gasparian, A
  • Gran, R
  • Horn, T
  • Huang, Liting
  • Huber, GM
  • Jayalath, C
  • Johnson, M
  • Jones, MK
  • Kalantarians, N
  • Liyanage, A
  • Keppel, CE
  • Kinney, E
  • Li, Y
  • Malace, S
  • Manly, S
  • Markowitz, P
  • Maxwell, J
  • Mbianda, NN
  • McFarland, KS
  • Meziane, M
  • Meziani, ZE
  • Mills, GB
  • Mkrtchyan, H
  • Mkrtchyan, A
  • Mulholland, J
  • Nelson, J
  • Niculescu, G
  • Niculescu, I
  • Pentchev, L
  • Puckett, A
  • Punjabi, V
  • Qattan, IA
  • Reimer, PE
  • Reinhold, J
  • Rodriguez, VM
  • Rondon-Aramayo, O
  • Sakuda, M
  • Sakumoto, WK
  • Segbefia, E
  • Seva, T
  • Sick, I
  • Slifer, Karl
  • Smith, GR
  • Steinman, J
  • Solvignon, P
  • Tadevosyan, V
  • Tajima, S
  • Tvaskis, V
  • Smith, GR
  • Vulcan, WF
  • Walton, T
  • Wesselmann, FR
  • Wood, SA
  • Ye, Zhihong
  • Publication Date

  • 2018
  • Keywords

  • nucl-ex