An overview of recent nucleon spin structure measurements at Jefferson Lab

Conference · Mon Feb 01 00:00:00 EST 2016 · PoS

OSTI ID:1237585

Allada, Kalyan ^[1]

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1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Jefferson Lab have made significant contributions to improve our knowledge of the longitudinal spin structure by measuring polarized structure functions, g1 and g2, down to Q2 = 0.02 GeV2. The low Q2 data is especially useful in testing the Chiral Perturbation theory (cPT) calculations. The spin-dependent sum rules and the spin polarizabilities, constructed from the moments of g1 and g2, provide an important tool to study the longitudinal spin structure. We will present an overview of the experimental program to measure these structure functions at Jefferson Lab, and present some recent results on the neutron polarizabilities, proton g1 at low Q2, and proton and neutron d2 measurement. In addition to this, we will discuss the transverse spin structure of the nucleon which can be accessed using chiral-odd transversity distribution (h1), and show some results from measurements done on polarized 3He target in Hall A.

• 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: FG02-94ER40818
• OSTI ID: 1237585
• Report Number(s): JLAB-PHY-15-2182; DOE/OR/23177-3674
• Journal Information: PoS, Vol. CD15; Conference: CD15 (Chiral Dynamics 2015), June 29 - July 3, 2015, INFN, Pisa
• Country of Publication: United States
• Language: English