Q2-Evolution of the Spin Structure Function g1(x,Q2) of the Proton and the Deuteron

Conference · Tue Oct 01 00:00:00 EDT 2013

OSTI ID:1989862

Prok, Yelena ^[1]; Bosted, Peter ^[2]; Kvaltine, Nicholas ^[3]

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1. Old Dominion Univ., Norfolk, VA (United States)
2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
3. Univ. of Virginia, Charlottesville, VA (United States)

Inelastic scattering using polarized nucleon targets and polarized charged lepton beams allows the extraction of spin structure functions that provide information about the helicity structure of the nucleon. A program designed to study such processes at low and intermediate Q2 for the proton and deuteron has been pursued by the CLAS Collaboration at Jefferson Lab since 1998. The latest inclusive data with high statistical precision were measured using polarized 6 GeV electrons incident on a 2.5\% r.l. polarized ammonia target. In the framework of pQCD, these results can be used to better constrain the polarization of quarks and gluons in the nucleon, as well as high-twist contributions. Some preliminary results will be shown, along with the expected impact on the NLO global fits and phenomenological models of valent spin structure.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1989862
• Report Number(s): JLAB-PHY-14-2093; DOE/OR/23177-6734
• Resource Relation: Conference: 2013 Fall Meeting of the APS Division of Nuclear Physics, October 23–26, 2013, Newport News, Virginia
• Country of Publication: United States
• Language: English