Physics at Lear with Low-Energy Cooled Antiprotons

ISBN-13: 9781468487299 / Angielski / Miękka / 2013 / 898 str.

Robert Klapisch; Ugo Gastaldi

Opis

The Workshop on Physics at LEAR with Low Energy Cooled Anti- protons was held in Erice, May 9 - 16, 1982, at the Ettore Majorana Centre for Scientific Culture, in the framework of the International School of Physics of Exotic Atoms. The Workshop was organized by a committee composed of R. Armenteros, D. Bugg, P. Dalpiaz, U. Gastaldi, K. Kilian, R. Klapisch, P. Lefevre, D. M6hl, S. Polikanov, B. Povh and J.M. Richard. It was attended by 101 physicists from 44 insti- tutions and 14 countries, representing one third of the LEAR users. Thjs Workshop was the first general meeting of the LEAR commu- nity after the approval of the CERN Low Energy Antiproton Ring faci- lity and of the experiments scheduled there for the initial period of oper&tion. It was organized for three main purposes: (i) to review the field of low energy antiproton physics, the initial LEAR experimental programme and the status of preparation of the approved experiments; (ii) to review the facility and the progress in its construction, and to discuss the conditions of its operation; (iii) to discuss future developments of the facility and of the experi- mental programme.These Proceedings contain the papers presented in Erice both orally and in the poster session, which displayed also contributions from colleagues who unfortunately could not attend the Workshop. The reports have been ordered in four sessions, following the pro- gramme of the meeting. The CERN low energy antiproton facility is presented in Section I.

Spis treści

Opening Address.- Opening Address.- The CERN Low Energy Antiproton Facility.- The CERN p? Complex and Present Status and Future Developments of the Antiproton Accumulator.- Construction of the Lear Facility: Status Report.- Phase-Space Cooling Techniques and Their Combination in Lear.- Ultraslow Extraction (Status Report).- The Lear Experimental Areas.- Some Limitations in Lear.- Low Energy Antiproton Physics and the Lear Experimental Programme.- Protonium and Other Exotic p?-Atoms.- The Atomic Cascade in p?p and Implications for p?p Annihilations at Rest.- Protonium Spectroscopy and Identification of P-Wave And S-Wave Initial States of pp? Annihilations at Rest with the Asterix Experiment at Lear.- PS174, Precision Survey of X-Rays from P?P (P?D) Atoms Using the Initial Lear Beam — Problems and Their Solutions.- The Cyclotron Trap: Status of Preparation and Planned Experiments (PS 175).- X-Ray Spectroscopy of p? Hydrogen in the Cyclotron Trap.- Effects of the Inelastic Channels and Quark Configurations in pp? and K-p Atoms.- The Nuclear Level Shift of Proton-Antiproton Atom.- Pressure Dependence of X-Ray Yields in Protonium.- Special “Sum Rules” for the X-Rays Yield from Protonium.- Nucleon-Antinucleon Annihilation at Low Energies.- Meson Resonances and Glueballs: Theoretical Review and Relevance to PP? at Lear.- pp? in Quark Model.- A Review of N?N Annihilation Potentials at Low Energies and the Shifts and Widths of p?-Nucleus Atomic Bound States.- The Annihilation of Quasinuclear Baryonium with Nonzero Angular Momenta.- (qq?) Spectroscopy and Search for Glueballs, Baryonia and other Boson Resonances in p?p Annihilations at Rest with the Asterix Experiment at Lear.- Investigations on Baryonium and Other Rare pp? Annihilation Modes Using High-Resolution ?° Spectrometers (PS182).- Search for Bound N?N States Using a Precision Gamma and Charged Pion Spectrometer at Lear(PS183).- pp? Annihilation at Rest in the One Meson Exchange Model: Application to the Asterix Experiment.- Role of Isospin in pp? Annihilation.- Electromagnetic form Factors of the Proton in the Time Like Region.- Vector Meson Spectroscopy in PP? ? e+e- X.- Precision Measurements of the Electromagnetic form Factors of the Proton in the Time-Like Region and Detailed Vector Meson Spectroscopy.- The PS 170 Central Detector.- A Five Pole Fit to the Proton and Neutron Electromagnetic form Factors and its Implications for the Reaction n?n?e+e-.- A New Measurement of pp? Excitation Functions.- Search for Structure in the PP? Annihilation Cross-Section in the S Region.- NN? Forces and Annihilation in the Potential Approach.- Applications of Dispersion Relations to Protonantiproton Scattering.- NN? Interaction in a Three Dimensional Relativistic Equation.- Status Report on Experiment PS172: p?p Total Cross: Section and Spin Effects in p?p + K+K-, ?+?- and p?p.- Measurement of pp? Cross-Sections at Low p? Momenta.- Spin-Dependence in NN? at Low Energy.- Spin-Effects in P-P? Scattering.- A Polarized Antiproton Beam at LEAR.- Study of Antineutron Production at LEAR.- Calculations of p?p ? Y?Y Near Threshold.- A Study of the p?p ? Y?Y Reaction at Threshold Using Lear.- Hyperon- and Antihyperon-Nucleon Scattering at LEAR.- Antiproton — Nucleus Interactions.- Quark-Gluon Plasma in p?- Annihilation on Nuclei.- On Possible Existence of Close-to-Threshold Level in the p?d System.- Antiproton Interaction with Light Nuclei.- What Can an Antiproton and a Nucleus Learn from Each Other?.- The Annihilation of Low-Energy Antiprotons in Nuclei.- Vacuum Polarization Corrections and Fine Structure in Antiprotonic Atoms.- Physics with Antiprotonic Atoms.- A Search for Heavy Hypernuclei at LEAR (PS 177).- Advanced Developments.- Theory of Electron Cooling in a Magnetic Field.- The Electron Cooling Device for LEAR.- High-Energy Electron Cooling at Lear pp?-Collider.- Measurements of Angular Distributions of Degraded Protons in Thick Absorbers.- A Small Deceleration Ring for Extra Low Energy Antiprotons (ELENA).- The Medicyc Cyclotron as a Temporary Decelerator for LEAR.- Co-Rotating Beams of Antiprotons and H- in LEAR and High Resolution Spectroscopy of pp? Atoms in Flight.- Production of and Experimentation with Antihydrogen at LEAR.- Internal Targets for LEAR.- A Clustered H2 Beam.- Internal Hydrogen or Solid Targets and Polarization Experiments at LEAR.- Comment on the Feasibility of Antiproton Polarization in LEAR by Means of the Transverse Stern-Gerlach Effect.- The Decays of Heavy Quarkonium as a Test of QCD.- Experimental Possibility of Charmonium and Bottonium Spectroscopy.- LEAR, Double-LEAR, Super-LEAR as Colliders.- New Ideas and Suggestions for Extensions of LEAR Experiments.- Test of the Non Separability of the K°K?° System.- Strong and Weak CP Violation at LEAR.- High Precision P-P? Mass Comparison.- A Penning Trap to Store Antiprotons.- A Possibility to Determine the p?H- Mass Difference with Stored and Cooled P? and H- Beams in LEAR.- On the Measurement of the Antineutron Mass.- Antiprotonic Atoms and Long Range Hadronic Interactions.- Angular Correlation between Annihilation Products and K? X Ray in pp? Annihilation at Rest.- High Resolution Study of p? — Atoms with a Focussing Crystal Spectrometer at LEAR.- pp? ? ?? at LEAR.- P?P Annihilation in Flight at LEAR.- Further Possibilities for Measurements on the p?p-System Using the Cyclotron Trap.- The Extraction of Low Energetic Antiprotons Out of a Cyclotron Trap.- Measurement of the p? Annihilation Cross-Section at Very Low Energy.- The Internal Pair Production as a Sensitive Tool for the Detection of Baryonium States.- Search for Baryonium by High Resolution Measurement of p?p Elastic Differential Cross Section and Analysing Power from 250 MeV/c to 700 MeV/c.- Threshold Studies at LEAR.- Could Antiprotons be Used to Get a Hot, Dense Plasma?.- Antiproton Annihilation in Nuclear Matter: Multipion-Nucleus Interactions and Exotic Phenomena.- On Some Specific Features of the p? Interaction with 9Be.- The Use of Antiproton Beams to Study Collision Phenomena in Gases and Solids, Together with Channeling Effects.- Antideuterons at LEAR.- Concluding Remarks.