6533b826fe1ef96bd12850c7
RESEARCH PRODUCT
Nuclear Quark and Gluon Distributions in Coordinate Space
Gunther PillerK. J. EskolaLech MankiewiczWolfram WeiseM. Vänttinensubject
PhysicsQuarkNuclear and High Energy PhysicsParticle physicsField (physics)High Energy Physics::PhenomenologyNuclear TheoryFOS: Physical sciencesPartonGluonHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::ExperimentCoordinate spaceNucleonNuclear ExperimentNuclear radiusdescription
In coordinate space, quark and gluon distributions of the nucleon are defined as correlation functions involving two field operators separated by a light-cone distance $y^+ = 2l$. We study the nuclear modifications of these distributions. The largest effect is a strong depletion of parton distributions (shadowing) at large longitudinal distances, which starts for all parton species at $l=2$ fm, i.e. at the average nucleon-nucleon separation in nuclei. On the other hand, the nuclear radius does not play a significant role. At $l \lsim 1$ fm, nuclear modifications of parton distributions are small. The intrinsic structure of individual nucleons is evidently not very much affected by nuclear binding. In particular, there is no evidence for a significant increase of the quark or gluon correlation length in bound nucleons.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-08-14 |