Proton Spin Structure in the Resonance Region

Journal Article · Wed Oct 11 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.98.132003· OSTI ID:893087

Wesselmann, F R; Slifer, K; Tajima, S; Aghalaryan, A; Ahmidouch, A; Asaturyan, R; Bloch, F; Boeglin, W; Bosted, P; Carasco, C; Carlini, R; Cha, J; Chen, J P; Christy, M E; Cole, L; Coman, L; Crabb, D; Danagoulian, S; Day, D; Dunne, J ; Elaasar, M; Ent, R; Fenker, H; Frlez, E; Gan, L; Gaskell, D; Gomez, J; Hu, B; Jones, M K; Jourdan, J; Keith, C; Keppel, C E; Khandaker, M; Klein, A; Kramer, L; Liang, Y; Lichtenstadt, J; Lindgren, R; Mack, D; McKee, P; McNulty, D; Meekins, D; Mkrtchyan, H; Nasseripour, R; Niculescu, I; Normand, K; Norum, B; Pocanic, D; Prok, Y; Raue, B; Reinhold, J; Roche, J; Rohe, D; Rondon, O A; Savvinov, N; Sawatzky, B; Seely, M; Sick, I; Smith, C; Smith, G; Stepanyan, S; Tang, L; Testa, G; Vulcan, W; Wang, K; Warren, G; Wood, S; Yan, C; Yuan, L; Yun, Junho; Zeier, Markus; Zhu, Hong Guo

The RSS collaboration has measured the spin structure functions g{sub 1} and g{sub 2} of the proton at Jefferson Lab using the lab's polarized electron beam, the Hall C HMS spectrometer and the UVa polarized solid target. The asymmetries A{sub parallel} and A{sub perp} were measured at the elastic peak and in the region of the nucleon resonances (1.085 GeV < W < 1.910 GeV) at an average four momentum transfer of Q{sup 2} = 1.3 GeV{sup 2}. The extracted spin structure functions and their kinematic dependence make a significant contribution in the study of higher-twist effects and polarized duality tests.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE - Office of Energy Research (ER)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 893087
• Report Number(s): JLAB-PHY-06-518; DOE/ER/40150-4068; nucl-ex/0608003; TRN: US0605934
• Journal Information: Physical Review Letters, Vol. 98
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DUALITY
ELECTRON BEAMS
FOUR MOMENTUM TRANSFER
NUCLEONS
PROTONS
RESONANCE
SPECTROMETERS
SPIN
STRUCTURE FUNCTIONS