Nuclear quark and gluon distributions in coordinate space - INSPIRE

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Nuclear quark and gluon distributions in coordinate space

Aug, 1998

17 pages

Published in:

Eur.Phys.J.A 3 (1998) 351-359

e-Print:

hep-ph/9808330 [hep-ph]

DOI:

10.1007/s100500050189

Report number:

TUM-T39-98-20,
JYFL-13-98

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Abstract:

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.

Note:

17 pages; Latex and Postscript files Report-no: TUM-T39-98-20, JYFL-13/98

nuclear physics
lepton nucleus: deep inelastic scattering
model: parton
lepton nucleon: deep inelastic scattering
Feynman graph: space-time
Compton scattering: off-shell
quark
gluon
correlation function
momentum spectrum: parton

References(25)

Figures(0)

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