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Author : Kai Hencken
Publisher :
ISBN 13 :
Total Pages : 109 pages
Book Rating : 4.:/5 (64 download)
Download or read book Electromagnetic Production of Electron Positron Pairs in Relativistic Heavy Ion Collisions written by Kai Hencken and published by . This book was released on 1994 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gerhard Baur
Publisher :
ISBN 13 :
Total Pages : 27 pages
Book Rating : 4.:/5 (749 download)
Download or read book Electron-positron Pair Production in Ultrarelativistic Heavy Ion Collisions written by Gerhard Baur and published by . This book was released on 2007 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (684 download)
Download or read book Coherent Electromagnetic Heavy Ion Reactions written by and published by . This book was released on 1999 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some recent theoretical results on coherent electromagnetic processes in ultrarelativistic heavy ion reactions are surveyed. In ultrarelativistic heavy ion collisions, Coulomb induced cross sections are huge, much larger than geometric. For the RHIC case of 100 GeV x 100 GeV colliding gold ions the predicted cross section for bound-electron positron pairs is about 110 barns. The corresponding cross section for continuum electron-positron pairs has recently been recalculated to be 34,000 barns, consistent with the result of the classic formula of Landau and Lifshitz. The cross section for Coulomb dissociation of the nucleus is about 95 barns, and the cross section for ionization of a single electron on one of the ions is about 100,000 barns.
Download or read book Electromagnetic Pair Production in Relativistic Heavy-ion Collisions written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We survey the production of electron, muon and tauon pairs in collisions between nuclei at ultra-relativistic energies. Such studies enhance our understanding of the role of the vacuum in field theory, and provide essential input for several experimental programs. A variety of models for the nuclear and nucleon form factors have been considered, revealing some degree of sensitivity to assumptions about sub-nuclear structure. We predict that the cross sections, even at high invariant masses and transverse momenta, are large on hadronic scales, and should act as useful probes of nuclear and nucleon form factors. 21 refs., 5 figs.
Download or read book Report on the Malawian Tripartite Study Tour on Industrial Courts, South Africa, 25-31 October written by and published by . This book was released on 199? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (684 download)
Download or read book Light-fronts Approach to Electron-positron Pair Production in Ultrarelativistic Heavy-ion Collisions written by and published by . This book was released on 1998 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors solve, in an ultrarelativistic limit, the time-dependent Dirac equation describing electron-positron pair production in peripheral relativistic heavy ion collisions using light front variables and a light-fronts representation, obtaining nonperturbative results for the free pair-creation amplitudes in the collider frame. Their result reproduces the result of second-order perturbation theory in the small charge limit while nonperturbative effects arise for realistic charges of the ions.
Author :
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (685 download)
Download or read book Perturbative and Nonperturbative EM Lepton Pair Production in Relativistic Heavy-ion Collisions written by and published by . This book was released on 1993 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this talk, the authors focus on electromagnetic dilepton production from the QED-vacuum in relativistic heavy-ion collisions. Heavy ions in relativistic motion generate strong time-dependent EM fields with large Fourier components which give rise to sizable pair production. There are several motivations for this study: Lepton pair production by hadronic (Drell-Yan) processes has been widely discussed as a possible signature of the quark-gluon plasma formation. The dominant background will come from electromagnetic sources and could even mask the signals from the plasma phase. Electromagnetically produced lepton pairs also impose severe constraints on the design of relativistic heavy-ion colliders such as RHIC and LHC. In addition to the free pair production discussed above, pair-production with capture of the negatively charged lepton into a bound state is also possible. This change of the charge state of the ions is the leading mechanism for beam loss of relativistic colliders. Accurate predictions of the cross section for this process are important because the cross section increases with energy.
Author : Rudolph C. Hwa
Publisher : CRC Press
ISBN 13 : 9782881247347
Total Pages : 338 pages
Book Rating : 4.2/5 (473 download)
Download or read book Relativistic Heavy-ion Collisions written by Rudolph C. Hwa and published by CRC Press. This book was released on 1990 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers of the June 1989 meeting in Beijing by the China Center of Advanced Science and Technology. This small book covers nucleus- nucleus collisions, states of the vacuum, and highly relativistic heavy ions in the experimental realm. Theoretical papers deal with quark-gluon plasma, and relativistic heavy ion collisions. Annotation copyrighted by Book News, Inc., Portland, OR
Author : William J. Marciano
Publisher : World Scientific
ISBN 13 : 9812385665
Total Pages : 271 pages
Book Rating : 4.8/5 (123 download)
Download or read book Electromagnetic Probes of Fundamental Physics written by William J. Marciano and published by World Scientific. This book was released on 2003 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the proceedings of a workshop which originated from a discussion with Professor A Zichichi in March 2001. The purpose of the meeting was to celebrate two developments at Brookhaven that, in both cases, are the outcome of more than a decade of preparation: the new muon g-2 measurement and the flood of data that started pouring out of RHIC. Bringing together people from these very different fields was an interesting challenge. But, at the time, when a small community of heavy ion physicists was beginning to define a program of electromagnetic interactions at RHIC and LHC, it seemed logical. The result is the white paper ?Hot Topics in Ultra-peripheral Collisions?.On Fermi's centennial, his original paper, developing for the first time the equivalent photon approximation, seemed to merit renewed attention. The paper has been translated into English from the Italian and included in the proceedings.
Author :
Publisher :
ISBN 13 :
Total Pages : 608 pages
Book Rating : 4.3/5 (91 download)
Download or read book Los Alamos Science written by and published by . This book was released on 1992 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Derrick S.F. Crothers
Publisher : Springer Science & Business Media
ISBN 13 : 1461542758
Total Pages : 313 pages
Book Rating : 4.4/5 (615 download)
Download or read book Relativistic Heavy-Particle Collision Theory written by Derrick S.F. Crothers and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: If a heavy particle ion (atom, molecule, muon) collides with another in the gas phase at speeds approaching the speed of light, the time-dependent Dirac equation equation must be used for its description, including quantum electro-dynamic, special relativity and magnetic coupling effects. In this book we study one electron in the variety of rearrangement collisions: radiative and non-radiative capture, ionization, capture by pair (one electron, one positron) production and antihydrogen production. Our relativistic continuum distorted-wave theory accounts extremely well for the simultaneous behaviour of the electron with respect to the nuclear charges of the projectile and the target. This is the first book developed in this subject. Containing many diagrams and tables, and fully referenced, it goes beyond chapters in previous books. The relativistic continuum distorted-wave theory developed by the authors group, is shown to be fully Hermitean. Detailed mathematics are provided in nine appendices.
Author : Derrick S.F. Crothers
Publisher : Springer Science & Business Media
ISBN 13 : 9780306464249
Total Pages : 328 pages
Book Rating : 4.4/5 (642 download)
Download or read book Relativistic Heavy-Particle Collision Theory written by Derrick S.F. Crothers and published by Springer Science & Business Media. This book was released on 2000-09-30 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: If a heavy particle ion (atom, molecule, muon) collides with another in the gas phase at speeds approaching the speed of light, the time-dependent Dirac equation equation must be used for its description, including quantum electro-dynamic, special relativity and magnetic coupling effects. In this book we study one electron in the variety of rearrangement collisions: radiative and non-radiative capture, ionization, capture by pair (one electron, one positron) production and antihydrogen production. Our relativistic continuum distorted-wave theory accounts extremely well for the simultaneous behaviour of the electron with respect to the nuclear charges of the projectile and the target. This is the first book developed in this subject. Containing many diagrams and tables, and fully referenced, it goes beyond chapters in previous books. The relativistic continuum distorted-wave theory developed by the authors group, is shown to be fully Hermitean. Detailed mathematics are provided in nine appendices.
Author :
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (727 download)
Download or read book Coherent Particle Production from Relativistic Heavy-ion Collisions written by and published by . This book was released on 1990 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of charged vector boson pairs from the coherent electromagnetic field of colliding nuclei is calculated within the framework of a classical field approximation. The approximation is derrived for both lepton and boson pairs in terms of two-photon Feynman diagrams. 17 refs., 4 figs.
Author :
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (684 download)
Download or read book Light-Fronts Approach to a Two-Center Time-Dependent Dirac Equation written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consider the relativistic scattering problem of an electron in the external field of two point-like charges (ions), moving on parallel, straight-line trajectories in opposite directions at speeds which approach the speed of light, and at an impact parameter 2b. An external-field approach to the influence of the ions on the electron is appropriate for peripheral impact parameters, heavy-ions, and high energies, where, to a very good approximation, the ions travel on parallel, straight-line trajectories, and ion recoil is negligible. We review here our recent work on this problem [1, 2, 3]. In section 2, following Ref. [2], we show that the two center time dependent Dirac equation for the electron reduces in the high energy limit to Eq. (26) with the interactions of Eq. (29). In section 3, following Ref. [1], we solve this equation off the light fronts i.e. for an electron that both initially and asymptotically is not co-moving with an ion. The main result of our work is the transition amplitude given by Eqs. (90) and (67). In section 4, we discuss the application of this solution to electromagnetic pair production in heavy ion collisions, which we have used, for example, in Ref. [3], to explain recent experimental results. We note that one should distinguish between electron-positron pairs produced so that they are co-moving with the ions and those that are not. The two cases differ experimentally. They also differ theoretically, because they are described by different asymptotic boundary conditions. We have solved the problem only for electron-positron pairs that are not co-moving with the ions. Our solution to the two center Dirac equation in the high energy limit was confirmed by different methods, including a Green function approach [4], and resummation of the perturbation series [5]. The application to pair production on the other hand, has raised some controversy, which is also discussed in section 4. Section 5 concludes.
Author : Vladimir Borisovitch Morozov
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (34 download)
Download or read book Electron-positron Production in Ultra-peripheral Heavy-ion Collisions with the STAR Experiment written by Vladimir Borisovitch Morozov and published by . This book was released on 2003 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William J. Marciano
Publisher : World Scientific
ISBN 13 : 9812704213
Total Pages : 271 pages
Book Rating : 4.8/5 (127 download)
Download or read book Electromagnetic Probes of Fundamental Physics written by William J. Marciano and published by World Scientific. This book was released on 2003 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the proceedings of a workshop which originated from a discussion with Professor A Zichichi in March 2001. The purpose of the meeting was to celebrate two developments at Brookhaven that, in both cases, are the outcome of more than a decade of preparation: the new muon g-2 measurement and the flood of data that started pouring out of RHIC. Bringing together people from these very different fields was an interesting challenge. But, at the time, when a small community of heavy ion physicists was beginning to define a program of electromagnetic interactions at RHIC and LHC, it seemed logical. The result is the white paper OC Hot Topics in Ultra-peripheral CollisionsOCO.On Fermi''s centennial, his original paper, developing for the first time the equivalent photon approximation, seemed to merit renewed attention. The paper has been translated into English from the Italian and included in the proceedings."
Author : Greiner W. Hold
Publisher : Springer Science & Business Media
ISBN 13 : 1489921397
Total Pages : 896 pages
Book Rating : 4.4/5 (899 download)
Download or read book Quantum Electrodynamics of Strong Fields written by Greiner W. Hold and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NATO Advanced Study Institute on Quantum Electrodynamics of Strong Fields was held at Lahnstein on the Rhine from 15-26 June, 1981. The school was devoted to the advances, theoretical and exper imental, in the physics of strong fields made during the past decade. The topic of the first week was almost exclusively quantum electrodynamics, with discussions of symmetry breaking in the ground state, of the physics of heavy ion collisions and of precision tests of perturbative quantum electrodynamics. This was followed in the second week by the presentation of a broad range of other areas where strong fields occur, reaching from nuclear physics over quantum chromodynamics to gravitation theory and astrophysics. We were fortunate to be able to call on a body of lecturers who not only have made considerable personal contributions to these advances but who are also noted for their lecturing skills. Their dedication for their subject was readily transmitted to the stu dents resulting in a very successful school. This enthusiasm is also reflected in their contributions to these Proceedings which, as I believe, will in time become a standard source of reference for future work on the physics of strong fields and will help to spread the benefits of the school to a larger audience than those who were able to attend. I regret that the Soviet colleagues Ya. B. Zeldovich and V. S. Popov were unable to participate.
