N. N. Nikolaev, W. Schäfer, B. G. Zakharov, V. R. Zoller, “Saturation of nuclear partons: the fermi statistics or nuclear opacity?”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2002, Volume 76, Issue 4,Pages <nobr>231

This article is cited in 9 papers

FIELDS, PARTICLES, AND NUCLEI

Saturation of nuclear partons: the fermi statistics or nuclear opacity?

N. N. Nikolaev^ab, W. Schäfer^c, B. G. Zakharov^b, V. R. Zoller^d

^a Institute f. Kernphysik, Forschungszentrum Jülich
^b Landau Institute for Theoretical Physics, Russian Academy of Sciences
^c NORDITA
^d Institute for Theoretical and Experimental Physics (Russian Federation State Scientific Center), Moscow

Abstract: We derive the two-plateau momentum distribution of final state (FS) quarks produced in deep inelastic scattering (DIS) off nuclei in the saturation regime. The diffractive plateau which dominates for small $p$ measures precisely the momentum distribution of quarks in the beam photon, the rôle of the nucleus is simply to provide an opacity. The plateau for truly inelastic DIS exhibits a substantial nuclear broadening of the FS momentum distribution. We discuss the relationship between the FS quark densities and the properly defined initial state (IS) nuclear quark densities.The Weizsäcker-Williams glue of a nucleus exhibits a substantial nuclear dilution, still soft IS nuclear sea saturates because of the anti-collinear splitting of gluons into sea quarks.

PACS: 24.85.+p

Received: 10.07.2002

Language: English