There are several different experimental indications, such as the σπN term, strange spin polarization, strangeness contribution to the magnetic moment of the proton, ratio of strange and non strange quark flavor distributions which suggest that the nucleon contains a hidden strangeness component which is contradictory to the naive constituent quark model. Chiral constituent quark model with con...

Event Generators (denoted as EvG’s henceforth) have been the workhorses of all modern experiments in high-energy physics. For good reasons: in spite of being conceptually simple, they provide fairly good descriptions of the real events occurring in detectors, allowing experimenters to perform a variety of tasks, from computing efficiencies to design strategies for achieving given measurements o...

We review the production of high-mass lepton pairs in fixed-target experiments, including both Drell-Yan (DY) and heavy quarkonium production (J/ψ, ψ, Υ(1S), Υ(2S), and Υ(3S)). In recent years DY data has become standard input to the determination of parton density distributions. DY data has recently yielded the first measurement of the x-dependence of the d̄/ū asymmetry of the proton. Similar t...

We consider reproducing kernel Hilbert spaces of Dirichlet series with kernels of the form k(s, u) = ∑ ann −s−ū, and characterize when such a space is a complete Pick space. We then discuss what it means for two reproducing kernel Hilbert spaces to be “the same”, and introduce a notion of weak isomorphism. Many of the spaces we consider turn out to be weakly isomorphic as reproducing kernel Hil...

Consider the 3D flow of a viscous Newtonian fluid upon a curved 2D substrate when the fluid film is thin as occurs in many draining, coating and biological flows. We derive a comprehensive model of the dynamics of the film, the model being expressed in terms of the film thickness η and the average lateral velocity ū. Based upon centre manifold theory, we are assured that the model accurately in...

I review some aspects of K and B physics both in the context of the standard model and in some cases in a scenario which is rather different from the standard model. I discuss, in particular, where we are likely to see deviations from the standard model in the near future before new colliders are built. 1. The Three Family Standard Model. In the title, which was given to me by the organizers, I...

Nucleon sea structure functions are studied using Dokshitzer-Gribov-Lipatov-AltarelliParisi (DGLAP) equations with the massive gluon-quark splitting kernels for strange and charm quarks, the massless gluon-quark splitting kernels for up and down quarks, and the massless kernels for all other splitting parts. The SU(2)f flavor symmetry for two light quarks, ‘up’ and ‘down’, is assumed. Glück-Rey...

For a CNF formula F we define its 1-conflict graph as follows: Two clauses C,D ∈ F are connected by an edge if they have a nontrivial resolvent – that is, if there is a unique literal u ∈ C for which ū ∈ D. Let lc1(F ) denote the maximum degree of this graph. A k-CNF formula is a CNF formula in which each clause has exactly k distinct literals. We show that (1) a k-CNF formula F with lc1(F ) ≤ ...

Helicity distributions of valence quarks have been investigated in many experiments and are now well known. On the other hand, the distributions of the polarized sea are poorly known. In particular, concerning ∆ū(x), fits assuming a totally flavour symmetric sea suggest a sign opposite respect to fits based on a flavour broken sea . The situation is even more confused concerning the transversit...