Non-perturbative inputs for gluon distributions in the hadrons

Description of hadronic reactions at high energies is conventionally done in the framework of QCD factorization. All factorization convolutions comprise non-perturbative inputs mimicking non-perturbative contributions and perturbative evolution of those inputs. We construct inputs for the gluon–hadr...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2017-03, Vol.77 (3), p.1-11, Article 167
Main Authors: Ermolaev, B. I., Troyan, S. I.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Criteria
Elementary Particles
Factorization
Hadrons
Heavy Ions
Kinematics
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum chromodynamics
Quantum Field Theories
Quantum Field Theory
Regular Article - Theoretical Physics
Spectators
String Theory
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Summary:Description of hadronic reactions at high energies is conventionally done in the framework of QCD factorization. All factorization convolutions comprise non-perturbative inputs mimicking non-perturbative contributions and perturbative evolution of those inputs. We construct inputs for the gluon–hadron scattering amplitudes in the forward kinematics and, using the optical theorem, convert them into inputs for gluon distributions in the hadrons, embracing the cases of polarized and unpolarized hadrons. In the first place, we formulate mathematical criteria which any model for the inputs should obey and then suggest a model satisfying those criteria. This model is based on a simple reasoning: after emitting an active parton off the hadron, the remaining set of spectators becomes unstable and therefore it can be described through factors of the resonance type, so we call it the resonance model. We use it to obtain non-perturbative inputs for gluon distributions in unpolarized and polarized hadrons for all available types of QCD factorization: basic, K T -and collinear factorizations.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-017-4724-x