C. Boros

Evidence for Substantial Charge Symmetry Violation in Parton Distributions

In principle one can test the validity of charge symmetry for parton distributions by comparing structure functions measured in neutrino and charged lepton deep inelastic scattering. New experiments make such tests possible; they provide rather tight upper limits on parton charge symmetry violation [CSV] for intermediate Bjorken x, but appear to show evidence for CSV effects at small x. We examine two effects which might account for this experimental discrepancy: nuclear shadowing corrections for neutrinos, and strange quark contributions s(x) 6 ¯(x). We show that neither of these two corrections removes the experimental discrepancy between the structure functions. We are therefore forced to consider the possibility of a surprisingly large CSV effect in the nucleon sea quark distributions. PACS: 13.60.Hb, 13.15.+g, 12.40.Vv, 11.40.Ha

Parton distributions for the octet and decuplet baryons

We calculate the parton distributions for both polarized and unpolarized octet and decuplet baryons, using the MIT bag, dressed by mesons. We show that the hyperfine interaction responsible for the

Lambda polarization in polarized proton-proton collisions at BNL RHIC

ensuremath{Delta}ensuremath{-}N

A New analysis of charge symmetry violation in parton distributions

and

Shadowing in neutrino deep inelastic scattering and the determination of the strange quark distribution

{ensuremath{Sigma}}^{0}ensuremath{-}ensuremath{Lambda}

Deep inelastic scattering on asymmetric nuclei

splittings leads to large deviations from

Structure and Production of Lambda Baryons

mathrm{SU}(3)

Role of the Delta (1232) in DIS on polarized

and

^3

mathrm{SU}(6)

He and extraction of the neutron spin structure function

predictions. For the