High energy neutrino interactions induce charmed hadron production at the level of a few percent and therefore they constitute a powerful tool to study charm physics. The CHORUS experiment can profit of the extremely high spatial resolution of nuclear emulsions to identify and study the charm production and decay vertexes. This experiment is now analyzing the final data sample and publishing ne...

Structure function data together with other measurements from fixed-target deep inelastic scattering and hadron-hadron collider experiments which contribute to our knowledge of the parton density functions are reviewed. The inclusive cross-section measurements of neutral and charged current interactions at HERA are presented and their impact on the parton density functions is discussed. Future ...

We consider all the dimension 6 operators as well as some simple extensions of the standard model that give new contributions to neutrino interactions with matter. Such interactions are usually parametrized by αβ , where α and β are neutrino flavor indices taking the values e, μ and τ . In the simple models we consider the αβ ’s are much more constrained than in the operatorbased model-independ...

Since a number of years the QGSJET model has been successfully used by different groups in the field of high energy cosmic rays. Current work is devoted to the first general update of the model. The key improvement is connected to an account for non-linear interaction effects which are of crucial importance for reliable model extrapolation into ultra-high energy domain. The proposed formalism a...

Department of Physics, Saga University, Saga 840-8502, Japan Abstract Using a phenomenological model with vector-type interactions, we discuss a role of repulsive force in the quark-hadron phase transition at high density. For realization of the quark phase at high density, strong vector coupling is needed in the hadron phase, while it is forbidden in the quark phase. For the quark-phase, a NJL...

The next generation of long-baseline neutrino experiments will be capable precision measurements oscillation parameters, neutrino-nucleus scattering, and unprecedented sensitivity to physics beyond the Standard Model. Reduced uncertainties in fluxes are necessary achieve high these future precise measurements. New hadron-nucleus interaction cross sections needed reduce fluxes. We report differe...

The quark model emerged from the Gell-Mann–Ne’eman flavor SU(3) symmetry. Its development, in the context of strong interactions, took place in a heuristic theoretical framework, referred to as the Bootstrap Era. Setting the background for the dominant ideas in strong interaction of the early 1960s, we outline some aspects of the constituent quark model. An independent theoretical development w...

Based on chiral dynamics, existence of exotic hadrons is discussed in the SU(3) symmetric limit. The low energy s-wave interaction of the Nambu-Goldstone boson with a hadron is known to be determined model-independently, which has been used to generate some hadron resonances in nonexotic channels. We show that this interaction in any exotic channels is not strong enough to generate a bound stat...

This talk summarizes recent QCD results from HERA, the Tevatron Collider and Tevatron fixed target experiments.

Since Yukawa proposed that the pion is responsible for mediating nucleon-nucleon interaction, meson exchanges have been widely used in understanding hadron-hadron interactions. The most studied mesons are ? , ? ? and ? while other heavier often argued to be less relevant because they lead short range However, whether of interactions or long should judged with respect size system studied. We pro...