ar X iv : h ep - p h / 97 02 22 0 v 1 2 F eb 1 99 7 The proton and the photon , who is probing who ?

ar X iv : h ep - p h / 97 11 35 5 v 1 1 7 N ov 1 99 7 Parton distributions in the photon from γ ∗ γ and γ ∗ p scattering

Parton distributions in the photon from γ * γ and γ * p scattering Abstract Leading order parton distributions in the photon are extracted from the existing F γ 2 measurements and the low-x proton structure function. The latter is related to the photon structure function by assuming Gribov factorization to hold at low x. The resulting parton distributions in the photon are found to be consisten...

ar X iv : h ep - p h / 97 02 25 7 v 1 5 F eb 1 99 7 The Charm of the Proton and the Λ + c Production 1

We propose a two component model for charmed baryon production in pp collisions consisting of the conventional parton fusion mechanism and fragmentation plus quarks recombination in which a ud valence diquark from the proton recombines with a c-sea quark to produce a Λ + c. Our two-component model is compared with the intrinsic charm two-component model and experimental data.

ar X iv : h ep - e x / 97 11 02 0 v 1 2 6 N ov 1 99 7 CLNS 97 / 1521

ar X iv : h ep - t h / 99 02 02 7 v 1 3 F eb 1 99 9 INFRARED REGION OF QCD AND CONFINEMENT

Gauge field configurations appropriate for the infrared region of QCD is proposed. Using the usual QCD action, confinement is realized as in the London theory of Meissner effect.

ar X iv : h ep - p h / 97 02 22 3 v 1 3 F eb 1 99 7 RECENT DEVELOPMENTS IN LOW x PHYSICS 1

The QCD expectations for the behaviour of the deep inelastic scattering structure functions in the region of small values of the Bjorken parameter x are summarized. The Balitzkij, Lipatov, Fadin, Kuraev (BFKL) equation which sums the leading powers of α s ln(1/x) is described and confronted with the " conventional " formalism based on the leading order QCD evolution equations. The small x behav...