Physicis of Q{sup 2}-dependence in the nucleon`s G{sub 1}(x,Q{sup 2}) structure function sum rule

Conference · Wed Oct 26 00:00:00 EDT 1994

OSTI ID:121671

Ji, X ^[1]

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1. Massachusetts Institute of Technology, Cambridge, MA (United States)

I discuss in this talk the physics of the Q{sup 2} dependence of the G{sub l}(x,Q{sup 2}) structure function sum rule. For Q{sup 2} > 3 GeV{sup 2}, the Q{sup 2} variation is controlled by pure QCD radiative corrections. For 0.5 < Q{sup 2} < 3 GeV{sup 2}, the twist-four contribution becomes significant, but stays perturbative. For Q{sup 2} below {approximately} 0.05, the sum rule is determined by low-energy theorems. The rapid change of the sum rule between 0.05 and 0.5 GeV{sup 2} signals the transition between parton and hadron degrees of freedom.

• Research Organization: Southeastern Universities Research Association, Inc., Newport News, VA (United States). Continuous Electron Beam Accelerator Facility
• OSTI ID: 121671
• Report Number(s): DOE/ER/40150-284; CEBAF-R-94-004; CONF-9410385-; ON: DE96000102; TRN: 95:024110
• Resource Relation: Conference: Spin degrees of freedom in electromagnetic nuclear physics, Williamsburg, VA (United States), 26 Oct 1994; Other Information: PBD: 26 Oct 1994; Related Information: Is Part Of Spin degrees of freedom in electromagnetic nuclear physics; Burkert, V.D. [CEBAF, Newport News, VA (United States)]; PB: 146 p.
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
NUCLEONS
STRUCTURE FUNCTIONS
LEPTON-NUCLEON INTERACTIONS
MOMENTUM TRANSFER
SUM RULES
RADIATIVE CORRECTIONS
QUANTUM CHROMODYNAMICS
SPIN