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 a new 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