Instanton-induced contributions of fractional twist to the cross section of hard gluon-gluon scattering in QCD
- Physics Department, Pennsylvania State University, 104 Davey Lab., University Park, Pennsylvania 16802 (United States)
- Max-Planck-Institut fuer Physik, Werner-Heisenberg-Institut, P.O. Box 40 12 12, Munich (Germany)
We study the instanton-induced cross section of hard gluon scattering in deep-inelastic kinematics. We find that the structure functions may possess numerically large nonperturbative contributions, which are related to Ringwald-type processes with the violation of chirality, and correspond to the exponential correction to the coefficient function in front of the parton distribution of the leading twist. Instanton-induced contributions are well defined for the structure function at the fixed value of the Bjorken scaling variable, and are probably absent in the moments. At intermediate virtualities of the order of [ital Q][sup 2][similar to](30--50 GeV)[sup 2] these essentially nonperturbative contributions of fractional twist reach large values, of order 10[sup 0]--10[sup [minus]2] of the perturbative cross section, and remain at the same time under theoretical control.
- DOE Contract Number:
- FG02-90ER40577
- OSTI ID:
- 6747437
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Vol. 47:5; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GLUON-GLUON INTERACTIONS
CROSS SECTIONS
QUANTUM CHROMODYNAMICS
BARYON NUMBER
DEEP INELASTIC SCATTERING
INSTANTONS
LEPTON NUMBER
NUMERICAL ANALYSIS
FIELD THEORIES
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MATHEMATICS
PARTICLE INTERACTIONS
QUANTUM FIELD THEORY
QUASI PARTICLES
SCATTERING
662230* - Quantum Chromodynamics- (1992-)
662110 - General Theory of Particles & Fields- Theory of Fields & Strings- (1992-)