A comparative study of simulated air shower longitudinal profiles is presented. An appropriate thinning level for the calculations is first determined empirically. High statistics results are then provided, over a wide energy range, (1014.0 to 1020.5 eV), for proton & iron primaries, using four combinations of the MOCCA & CORSIKA program frameworks, and the SIBYLL & QGSjet high energy hadronic ...

Recent results on studies of the structure of nucleons and nuclei in the regime of strong interaction QCD are discussed. Use of high current polarized electron beams, polarized targets, and recoil polarimeters, in conjunction with modern spectrometers and detector instrumentation allow much more detailed studies of nucleon and nuclear structure than has been possible in the past. The CEBAF acce...

The simulation analysis of the Extensive Air Showers (EAS) was executed by exploring longitudinal development employing AIRES system (version 19.04.00) for several hadronic interaction models (SIBYLL, QGSJET, and EPOS) high energies. performed different energies (1017, 1018, 1019) eV two dissimilar primary particles, proton as well iron nuclei, with zenith angles values (0o, 10o, 30o). shower s...

We study the radial distribution function of color sources (strings) formed in hadronic collisions and requirements to obtain a liquid. As repulsive interaction is needed, we incorporate concentric core strings as well probability that string allows core-core overlaps. find systems where difference between gas-liquid confined-deconfined phase transition temperatures small. This explains experim...

Nuclear shadowing corrections are dominated by soft interaction and grow as function of 1/x more slowly than the single scattering term, which has an essential contribution from hard interaction. Therefore we predict vanishing nuclear shadowing at very low x provided that Q is high and fixed. At the same time, at medium and low Q, nuclear shadowing grows with 1/x as is well known for soft hadro...

Improved possibilities to find the Higgs boson in diffractive events, having less hadronic activity, depend on whether the cross section is large enough. Based on the soft color interaction models that successfully describe diffractive hard scattering at DESY HERA and the Fermilab Tevatron, we find that only a few diffractive Higgs events may be produced at the Tevatron, but we predict a substa...

Applying knowledge of the interaction between heavy quarks derived from the study of cc and bb bound states, we calculate the spectrum of cb mesons. We compute transition rates for the electromagnetic and hadronic cascades that lead from excited states to the S0 ground state, and briefly consider the prospects for experimental observation of the spectrum. PACS numbers: 14.40Lb, 14.40Nd, 13.40Hq...

New concept of intermediateand short-range nuclear force proposed by the authors a few years ago is discussed briefly. The general concept is based on an assumption on generation of the dressed dibaryon in intermediate state in NN interaction. This new mechanism has been shown to lead not only to numerous new predictions in hadronic physics but also should be responsible for a large portion of ...

At high energy, the photoproduction or electroproduction of Vector Mesons allow to prepare a beam of quark-antiquark pairs of a given flavor. At high momentum transfer, the study of the scattering of these pairs on a nucleon opens up an original window on the quark-gluon structure of hadronic matter, which may eventually shed light on its gluonic content, on correlations between quarks and on t...