Download or read book Kaon and Pion Interferometry Final Report written by and published by . This book was released on 1998 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Both NA44 and EOS continue to publish high quality data on relativistic heavy ion collisions. The next leap in energy will be provided by BRAHMS at RHIC. Experiment NA44 has measured particle correlations of [pi]{sup {+-}}, K and protons and single particle distributions of [pi]{sup {+-}}, K{sup {+-}}, p, {anti p}, d and {anti d} for pA, SA and PbPb collisions at 450GeV/c, 200A·GeV and 158A·GeV for the p, S and Pb beams respectively. When the spectra are fitted to an exponential in m{sub T}, the inverse slopes increase as the system gets heavier and with increasing particle mass. For larger systems the baryon density at mid-rapidity increases implying more secondary collisions. These fuel a collective expansion and a boost in transverse momentum proportional to the mass as seen in the data. The EOS collaboration has continued to publish results from their large data set of heavy ion collisions at the BEVALAC. They plan to study the energy dependence of coalescence and flow by comparing results from NA44 and EOS.
Download or read book Pion and Kaon Correlations in High Energy Heavy ion Collisions Annual Report April 1 1995 March 31 1996 written by and published by . This book was released on 1996 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data analysis is in progress for recent experiments performed by the NA44 collaboration with the first running of 160 A GeV 2°8Pb-induced reactions at the CERN SPS. Identified singles spectra were taken for pions, kaons, protons, deuterons, antiprotons and antideuterons. Two-pion interferometry measurements were made for semi-central-triggered 2°8Pb + Pb collisions. An upgraded multiple-particle spectrometer allows high statistics data sets of identified particles to be collected near mid-rapidity. A second series of experiments will be performed in the fall of 1995 with more emphasis on identical kaon interferometry and on the measurement of rare particle spectra and correlations. Modest instrumentation upgrades by TAMU are designed to increase the trigger function for better impact parameter selection and improved collection efficiency of valid events. An effort to achieve the highest degree of projectile-target stopping is outlined and it is argued that an excitation function on the SPS is needed to better understand reaction mechanisms. Analysis of experimental results is in the final stages at LBL in the EOS collaboration for two-ion interferometry in the 1.2 A GeV Au+Au reaction, taken with full event characterization.
Download or read book Pion and Kaon Interferometry of Nuclear Collisions written by and published by . This book was released on 1989 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the study complex reactions, the simple space-time interpretation of pion interferometry often breaks down due to strong correlations between spatial and momentum coordinates. In those cases, pion interferometry is still useful as a complementary test of specific dynamic models, but a refined formalism must be used, as discussed in the introduction. With this formalism, we show that recent NA35 data on O + Au → ?−?− + X at 200 AGeV are consistent with both hadronic resonance and quark-gluon plasma models for this reaction. The sensitivity of the outward and sideward transverse projected correlation function for pions is investigated. Finally, we compare pion and kaon interferometry predictions of these two models. 31 refs., 3 figs.
Download or read book Pion and Kaon Correlations in High Energy Heavy ion Collisions written by and published by . This book was released on 1996 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data analysis is in progress for recent experiments performed by the NA44 collaboration with the first running of 160 A GeV 2°8Pb-induced reactions at the CERN SPS. Identified singles spectra were taken for pions, kaons, protons, deuterons, antiprotons and antideuterons. Two-pion interferometry measurements were made for semi-central-triggered 2°8Pb + Pb collisions. An upgraded multi-particle spectrometer allows high statistics data sets of identified particles to be collected near mid-rapidity. A second series of experiments will be performed in the fall of 1995 with more emphasis on identical kaon interferometry and on the measurement of rare particle spectra and correlations. Modest instrumentation upgrades by TAMU are designed to increase the trigger function for better impact parameter selection and improved collection efficiency of valid events. An effort to achieve the highest degree of projectile-target stopping is outlined and it is argued that an excitation function on the SPS is needed to better understand reaction mechanisms. Analysis of experimental results is in the final stages at LBL in the EOS collaboration for two-pion interferometry in the 1.2 A GeV Au+Au reaction, taken with full event characterization. 35 refs., 15 figs., 5 tabs.
Download or read book Pion Correlations and Calorimeter Design for High Energy Heavy Ion Collisions Progress Report written by and published by . This book was released on 1997 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data analysis is in progress for recent experiments performed by the NA44 collaboration with the first running of 160 A GeV 2°8Pb-induced reactions at the CERN SPS. Identified singles spectra were taken for pions, kaons, protons, deuterons, antiprotons and antideuterons. Two-pion interferometry measurements were made for semi-central-triggered 2°8Pb + Pb collisions. An updated multi-particle spectrometer allows high statistics data sets of identified particles to be collected near mid-rapidity. A second series of experiments will be performed in the fall of 1995 with more emphasis on identical kaon interferometry and on the measurement of rare particle spectra and correlations. Modest instrumentation upgrades by TAMU are designed to increase the trigger function for better impact parameter selection and improved collection efficiency of valid events. An effort to achieve the highest degree of projectile-target stopping is outlined and it is argued that an excitation function on the SPS is needed to better understand reaction mechanisms. Analysis of experimental results is in the final stages at LBL in the EOS collaboration for two-pion interferometry in the 1.2 A GeV Au + Au reaction, taken with full event characterization.
Download or read book GSI 92 74 PREPRINT written by J. Bolz and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report of the European Organization for Nuclear Research written by European Organization for Nuclear Research and published by . This book was released on 1995 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pion Interferometry in E814 Toward Equilibrium at the AGS written by and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ultimate goal of ultra-relativistic heavy-ion program at the BNL AGS and CERN SPS is to study highly excited nuclear matter and the transition from hadronic matter to quark gluon plasma. In the QGP state, quarks and gluons are no longer confined but they move freely in a fairly large volume. According to their knowledge, the de-confined state can be approached via either compression or heating of nuclear matter in heavy-ion collisions. At AGS energies, the most relevant process is believed to be compression. However, before the authors try to identify any exotic events such as, for example QGP phase transition or chiral symmetry restoration, they have to answer the following questions: (1) Were the densities(due to the compression) high enough? (2) Was the high density region large enough? (3) Was the system thermalized? The authors report recent pion interferometry results from AGS experiment E814. By comparing to the results of RQMD calculations, a freeze-out size R{sub rms} = 8.3 fm is found in Si + Pb central collisions. A consistent thermal equilibration picture is established by comparing experimental data with the results of both hydrodynamic and cascade model calculations.
Download or read book Handbook on Neutral Kaon Interferometry at a phi factory written by Antonio Di Domenico and published by . This book was released on 2007 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report of the European Organization for Nuclear Research written by European Organization for Nuclear Research and published by . This book was released on 1990 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preprints and Reports on Display in the CERN Library written by European Council for Nuclear Research. Library and published by . This book was released on with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical Study of Pion and Kaon Photoproduction in Nuclei Final Technical Report written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The contract work was initiated by J. Epstein. The emphasis of the proposal was on (a) the continuation of DWIA calculations of the (.gamma., .pi./sup + -/) reaction in the .delta.(1232) region with the extension to the (.gamma., .pi.°) reaction and (b) the application of the DWIA approach to the (.gamma., K) reaction. The (.gamma., .pi.°) work was intended to be in close collaboration with the experimental studies underway at Bates Linear Accelerator and the (.gamma., K/sup + -/) calculations are relevant to proposed high duty factor electron accelerators in the 1 to 4 GeV region. DWIA calculations were carried out for coherent (.gamma., .pi.°) reactions in 12C. Although the DWIA approach seems less fundamental than the current .delta.-hole model calculations, we had hopes that it could be more readily applicable to incoherent reactions leaving the target nucleus in the excited state. Epstein hoped to improve the reliability of the DWIA calculations for coherent (.gamma., .pi.°) production by better treatment of the .delta. propagating in the nuclear medium. In parallel with the (.gamma., .pi.°) work, Epstein carried on an active collaboration with William Donnelly on the (.gamma., K/sup + -/) problem. They had succeeded in a relatively complete description of the reaction for 12C, and were beginning to extend the results to heavy nuclei, when Epstein abruptly resigned his academic post at Boston University (in August 1983) and took an industrial position. Justus Koch of NIKEF, working together with Donnelly, and assisted by modest per diem funds from this grant, the .gamma., K/sup + -/ calculations were carried forward. A copy of the talk by Donnelly entitled Photo- and Electron-Production of Kaons and the Study of Hypernuclei given October 29, 1984 at Bad Honnef, Germany is enclosed. The talk covers the results of the work initiated by Epstein and Donnelly, and completed by Koch and Donnelly.
Download or read book INIS Atomindex written by and published by . This book was released on 1987 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1990 with total page 1580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
