학술논문
Measurements of Nonsinglet Moments of the Nucleon Structure Functions and Comparison to Predictions from Lattice QCD for Q2=4 GeV2
Document Type
article
Author
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, K; Smith, GR; Steinman, J; Solvignon, P; Tadevosyan, V; Tajima, S; Tvaskis, V; Vulcan, WF; Walton, T; Wesselmann, FR; Wood, SA; Ye, Zhihong
Source
Physical Review Letters. 123(2)
Subject
Language
Abstract
We present extractions of the nucleon nonsinglet 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 datasets 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 that first calculates the quark distributions directly before determining moments.