ar X iv : h ep - p h / 03 02 17 6 v 1 1 9 Fe b 20 03 hep - ph

ar X iv : h ep - p h / 03 02 12 9 v 1 1 7 Fe b 20 03 Scalar σ meson effects in radiative ρ 0 - meson decays

ar X iv : h ep - p h / 03 02 17 0 v 1 1 9 Fe b 20 03 Global DGLAP fit analyses of the nPDF : EKS 98 and HKM ∗

The DGLAP analyses of the nuclear parton distribution functions (nPDF) based on the global fits to the data are reviewed, and the results from EKS98 and HKM are compared. The usefulness of measuring hard probes in pA collisions , at the LHC in particular, is demonstrated.

ar X iv : a st ro - p h / 03 02 17 7 v 1 1 0 Fe b 20 03 Polarization in GRB Afterglows

ar X iv : h ep - p h / 03 02 10 9 v 1 1 3 Fe b 20 03 LBNL - 52160 Ξ − and Ω Distributions in Hadron - Nucleus Interactions 1

Strange baryons have long been known to exhibit a leading particle effect. A recent comparison of Ξ − production in π − , n, and Σ − interactions with nuclei show this effect clearly. These data are supplemented by earlier measurements of Ξ − and Ω production by a Ξ − beam. We calculate the Ξ − and Ω x F distributions and nuclear dependence in hA interactions using the intrinsic model.

ar X iv : h ep - p h / 03 02 18 5 v 1 2 0 Fe b 20 03 Nonlinear corrections to the DGLAP equations ; looking for the saturation limits ∗

The effects of the first nonlinear corrections to the DGLAP equations are studied in light of the HERA data. Saturation limits are determined in the DGLAP+GLRMQ approach for the free proton and for the Pb nucleus.