II-1. Operator Product Expansion and Deep Inelastic Scatterings
نویسندگان
چکیده
منابع مشابه
Deep-inelastic scattering and the operator product expansion in lattice QCD
We discuss the determination of deep-inelastic hadron structure in lattice QCD. By using a fictitious heavy quark, direct calculations of the Compton scattering tensor can be performed in Euclidean space that allow the extraction of the moments of structure functions. This overcomes issues of operator mixing and renormalisation that have so far prohibited lattice computations of higher moments....
متن کاملBreakdown of the operator product expansion of deep inelastic scattering in the ’t Hooft model
We consider deep inelastic scattering in the ’t Hooft model. Being solvable, this model allows us to directly compute the moments associated to the cross section at next-to-leading order in the 1/Q expansion. We perform the same computation using the operator product expansion. We find that all the terms match in both computations except for one in the hadronic side, which is proportional to a ...
متن کاملThe Spin Structure of Nucleons and Deep Inelastic Scatterings
Based on a simple model which is compatible with the idea of the static quark model and the parton model, the polarized structure functions of proton and deuteron, two-spin asymmetries of π in polarized pp reactions and inelastic J/ψ productions in polarized lepton-proton collisions are analyzed. In particular, an important role of polarized gluon distributions is pointed out.
متن کاملOperator product expansion and analyticity
We discuss the current use of the operator-product expansion in QCD calculations. Treating the OPE as an expansion in inverse powers of an energy-squared variable (with possible exponential terms added), approximating the vacuum expectation value of the operator product by several terms and assuming a bound on the remainder along the euclidean region, we observe how the bound varies with increa...
متن کاملOperator product expansion and confinement
Operator product expansion technique is analyzed in abelian and nonabelian field theoretical models with confinement. Special attention is paid to the regimes where nonzero virtuality of vacuum fields is felt by external currents. It is stressed that despite the physics of confinement is sometimes considered as being caused by " soft " fields, it can exhibit the pronounced " hard " effects in OPE.
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics Supplement
سال: 1983
ISSN: 0375-9687
DOI: 10.1143/ptps.77.12