L. Cifarelli – författare

This volume contains the Proceedings of the 17th Workshop of the INFN ELOISATRON Project on "QCD at 200 TeV", held at the "Ettore Majorana" Centre for Scientific Culture, EMCSC, Erice, Trapani, Italy, in the period 11-17 June 1991. The new multi-Te V frontiers of Subnuclear Physics are no more beyond our imagination. A conceptual design of the highest energy (100+100 TeV) proton-proton collider -the ELOISA TRON -already exists. Intensive R&D studies are on the go to develop the most promising and innovative detector technologies for the highest energy and luminosity. QCD (Quantum Chromo-Dynamics) will be the theory to describe the expected Physics scenario of future S upercolliders. The purpose of the Workshop was therefore to review the recent status of QCD in High Energy interactions and to discuss the novel aspects of Perturbative and Non- Perturbative QCD with special emphasis on future experimental studies at Super-High Energy Colliders, up to the 200 Te V limit. The topics were: * Classical QCD: particle multiplication, multiplicities and spectra, jet profiles, coherence effects, etc.* Hadron interaction cross-sections and structure functions at Super-High Energies, small-x behaviour, QCD Pomeron, "hot spots". * QCD fragmentation models, present and future. * Artificial neural networks in High Energy Physics. * New theoretical aspects of QCD at Super-High Energies (instanton-induced large cross- sections, baryon number violation and peculiar multi-quark production events, etc.).

The present volume is based on the proceedings of the 12th Workshop of the INFN ELOISATRON Project, held at the "Ettore Majorana" Centre for Scientific Culture (EMCSC), Erice (frapani), Sicily, Italy, in the period September 15-20, 1990. The proceedings deal with the presentation of "New Technologies for Supercolliders". Three new energy frontiers (16,40 and 200 TeV) are now opened up for the future of Subnuclear Physics. Basic problems above the Fermi-energy are crowding up: but no one knows the energy levels needed for their solution. This is why the technology for experiments with the new generation of Supercolliders needs to be pursued having in mind the problems which are of common interest in the three energy frontiers. The primary purpose of the Workshop was to contribute towards the highest energy limit in the search for new instruments and new technologies. Furthermore, the present status and performances of various detector technologies were reviewed. The possible options for a powerful apparatus whose goal would be the discovery of the top, Higgs and SUSY particles in a very high energy, high rate environment, were finally analysed. The Workshop was sponsored by the Italian National Institute for Nuclear Physics (INFN), the Italian Ministry of Education, the Italian Ministry of Scientific and Technological Research and the Sicilian Regional Government. We are thankful to the staff of EMCSC for their efficient and warm support.

The present volume is based on the proceedings of the 12th Workshop of the INFN ELOISATRON Project, held at the "Ettore Majorana" Centre for Scientific Culture (EMCSC), Erice (frapani), Sicily, Italy, in the period September 15-20, 1990. The proceedings deal with the presentation of "New Technologies for Supercolliders". Three new energy frontiers (16,40 and 200 TeV) are now opened up for the future of Subnuclear Physics. Basic problems above the Fermi-energy are crowding up: but no one knows the energy levels needed for their solution. This is why the technology for experiments with the new generation of Supercolliders needs to be pursued having in mind the problems which are of common interest in the three energy frontiers. The primary purpose of the Workshop was to contribute towards the highest energy limit in the search for new instruments and new technologies. Furthermore, the present status and performances of various detector technologies were reviewed. The possible options for a powerful apparatus whose goal would be the discovery of the top, Higgs and SUSY particles in a very high energy, high rate environment, were finally analysed. The Workshop was sponsored by the Italian National Institute for Nuclear Physics (INFN), the Italian Ministry of Education, the Italian Ministry of Scientific and Technological Research and the Sicilian Regional Government. We are thankful to the staff of EMCSC for their efficient and warm support.

The present volume is based on the proceedings of the 6th and 7th INFN ELOISATRON project workshops, held at the Centro di Cultura Scientifica "Et- tore Majorana" CCSEM, Erice-Trapani, Sicily, Italy, in the period June 10-27, 1988. The topics of the two workshops were, respectively: * Heavy Flavours: Status and Perspectives, and * Novel Features of High Energy Collisions in 1-100 TeV Region. They were attended by sixty-three physicists. The two workshops were followed by a meeting of the INFN ELOISATRON working group, also held at the CCSEM in the period October 7-15, 1988 in which twenty-five physicists participated. Since there was quite a bit of overlap among speakers, participants and the topics covered at the three meetings, we have decided to issue ajoint proceeding, with the first part entitled: Heavy Flavour Physics, and the second: High Energy Physics with 1-100 Te V Proton Beams. Some of the reports included in this volume have been contributed by the INFN ELOISATRON working group members. The first. part of these proceedings deals mostly with the presentation and inter- pretation of results in t.he so-called fiavour physics sector.New results, which have become available in the last three years from experiments involving kaons, charmed and beauty hadrons, and searches for the still missing top quark at the present and fothcoming colliders are topics of major interest. here. The contributions in this part are organized in three categories: Experimental Results, Theoretical Interpretation, and Future Directions.

A number of major new accelerator facilities, which have shaped the activities of many physicists for the better part of a decade: SLC, LEP, HERA, has been completed. The new generation of high-luminosity pp supercolliders, LHC, SSC and Eloisatron (ELN), represents the great challenge of subnuclear physics. In this challenge the crucial problem is the design of a superdetector. It is clear that building the detectors will be the bottleneck for the Supercolliders. The CERN-LAA project is a concerted effort to solve the problems imposed by the harsh experimental conditions, under which the new physics has to be studied. It is conceptually and practically a unique effort. This Workshop brought together the physicists working on the LAA project and their reports are found in this volume.

In this workshop, the super high energy and luminosity frontiers of subnuclear physics were actively investigated. A conceptual design of the highest energy (100+100 TeV) proton-proton collider — the Eloisatron — already exists. There are many reasons to believe that supersymmetry and its local version, supergravity, could be relevant in a fundamental theory of particle reactions. The minimal supersymmetric extension of the standard model (MSSM) is today phenomenologically acceptable, theoretically motivated and calculable. The present and future colliders can play a crucial role in testing supersymmetry experimentally. The purpose of the workshop was therefore to review the main features of the MSSM as well as the possible non-minimal models and the issue of gauge coupling unification. Emphasis was given to theoretical and experimental results relevant to supersymmetric particle searches at present and future colliders.

The Eloisatron Project aims at the study of physics phenomena in hadron–hadron colliders at the limits of maximum energy and luminosity. QCD processes involving multiparticle final states have shown "universality features" in different production reactions once the "leading effects" are correctly accounted for. The study of these phenomena has three components: (i) at now-available energies; (ii) at future energies in the years to come; (iii) at extreme energies. The link between these components can be achieved by QCD and its developments.This volume reviews the recent status of QCD and discusses novel aspects of perturbative and non-perturbative approaches to different kinds of interactions. It contains various contributions on multihadron production (theory and phenomenology), perturbative QCD and pomeron physics. Also, the latest experimental results on pp, ep and e⁺e⁻ interactions are presented.