Spin Dependent Effects in Quantum Chromodynamics
| Author | : Steven David Bass |
| Publisher | : |
| Total Pages | : 248 |
| Release | : 1992 |
| Genre | : Deep inelastic collisions |
| ISBN | : |
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Spin 96 - Proceedings Of The 12th International Symposium On High-energy Spin Physics
| Author | : J E J Oberski |
| Publisher | : World Scientific |
| Total Pages | : 906 |
| Release | : 1997-04-15 |
| Genre | : |
| ISBN | : 9814546437 |
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Experiments using highly polarized intense beams and targets, and theoretical studies of spin and polarization phenomena, are now providing us with numerous additional details of the electroweak and strong interactions and the structure of matter. The spin structure of the nucleon has been measured over wide ranges of kinematic variables, and the cross sections have been calculated to several orders in perturbative field theory. At present, the influence of the higher twist contributions, the gluon spin, and the quark orbital angular momentum are under scrutiny. Quantum chromodynamics (QCD) captures a lot of our experimental knowledge of hard polarized scattering processes. Can our understanding of such processes within QCD be further improved?Hyperons produced in high energy reactions show how puzzling strong interactions between hadrons still are. Spin observables in experiments at intermediate energy are used to test parity and charge symmetries. Will they also reveal, at low energy, a violation of time reversal symmetry? We are on the verge of using parity violation measurements at intermediate electron scattering energies to determine the amount of strange quark contributions to the neutral weak form factor of the nucleon. The polarization of the sea quarks is expected to be measured soon in W± decays produced in high energy polarized proton interactions. Will the jets in polarized Z⁰ decays show a definite handedness? These and many other topics are discussed in these proceedings.
Novel Spin Effects in Quantum Chromodynamics
| Author | : |
| Publisher | : |
| Total Pages | : 12 |
| Release | : 1993 |
| Genre | : |
| ISBN | : |
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This report discusses a number of interesting hadronic spin effects which test fundamental features of perturbative and non-perturbative QCD. These include constraints on the shape and normalization of the polarized quark and gluon structure functions of the proton; the principle of hadron helicity retention in high x[sub F] inclusive reactions; predictions based on total hadron helicity conservation in high momentum transfer exclusive reactions; the dependence of nuclear structure functions and shadowing on virtual photon polarization; and general constraints on the magnetic moment of hadrons. I also will discuss the implications of several measurements which are in striking conflict with leading-twist perturbative QCD predictions, such as the extraordinarily large spin correlation A[sub NN] observed in large angle proton-proton scattering, the anomalously large [rho][pi] branching ratio of the J/[psi], and the rapidly changing polarization dependence of both J/[psi] and continuum lepton pair hadroproduction observed at large x[sub F].
Quarkonia
| Author | : W. Buchmüller |
| Publisher | : Elsevier |
| Total Pages | : 327 |
| Release | : 2012-12-02 |
| Genre | : Science |
| ISBN | : 0444596143 |
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The discovery of the two families of heavy-quark-antiquark bound states, the &Ugr; and &PSgr; quarkonium spectroscopies, has played a crucial role in unravelling the nature of strong interactions. The articles collected together in this volume are concerned with the connection between quarkonia and quantum chromodynamics. They deal with potential models, spin-dependent forces, next-to-leading order QCD corrections for decay widths and energy level differences, hadronic transitions and the quark-antiquark interaction in QCD, based on perturbation theory, lattice gauge theory and QCD sum rules. Finally, a brief guide is given to the existing literature on possible new quarkonium systems which have been conjectured in connection with gluonic degrees of freedom, and with expectations for new heavy particles with colour, such as the top quark and scalar quarks.
Quantum Chromodynamics: Collisions, Confinement And Chaos - Proceedings Of The Workshop
| Author | : Herbert Martin Fried |
| Publisher | : World Scientific |
| Total Pages | : 428 |
| Release | : 1997-04-01 |
| Genre | : |
| ISBN | : 9814546534 |
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During the week of 3-8 June 1996, approximately 83 theoretical (and 2 experimental) physicists interested in the current problems of Quantum Chromodynamics (QCD) gathered at the American University of Paris, France, to present and discuss a total of 59 papers on Collisions, Confinement, and Chaos in QCD. Each of these three subfields filled at least two half-day sessions; and another four half-day sessions were devoted to miscellaneous and interesting papers on Quantum Field Theory (QFT), and especially on the proper construction of high-energy scattering amplitudes.
Spin Effects in Perturbative Quantum Chromodynamics
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 1980 |
| Genre | : |
| ISBN | : |
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The spin dependence of large momentum transfer exclusive and inclusive reactions can be used to test the gluon spin and other basic elements of QCD. In particular, exclusive processes including hadronic decays of heavy quark resonances have the potential of isolating QCD hard scattering subprocesses in situations where the helicities of all the interacting constituents are controlled. The predictions can be summarized in terms of QCD spin selection rules. The calculation of magnetic moment and other hadronic properties in QCD are mentioned.
Quantum Chromodynamics
| Author | : B. L. Ioffe |
| Publisher | : Cambridge University Press |
| Total Pages | : 597 |
| Release | : 2010-01-21 |
| Genre | : Science |
| ISBN | : 1139484850 |
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Aimed at graduate students and researchers in theoretical physics, this book presents the modern theory of strong interaction: quantum chromodynamics (QCD). The book exposes various perturbative and nonperturbative approaches to the theory, including chiral effective theory, the problems of anomalies, vacuum tunnel transitions, and the problem of divergence of the perturbative series. The QCD sum rules approach is exposed in detail. A great variety of hadronic properties (masses of mesons and baryons, magnetic moments, form factors, quark distributions in hadrons, etc.) have been found using this method. The evolution of hadronic structure functions is presented in detail, together with polarization phenomena. The problem of jets in QCD is treated through theoretical description and experimental observation. The connection with Regge theory is emphasized. The book covers many aspects of theory which are not discussed in other books, such as CET, QCD sum rules, and BFKL.
Spin-dependent Quantum Phenomena
| Author | : 陳松賢 |
| Publisher | : |
| Total Pages | : 187 |
| Release | : 2009 |
| Genre | : |
| ISBN | : |
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Spin Dynamics And Snakes In Synchrotrons
| Author | : Shyh-yuan Lee |
| Publisher | : World Scientific Publishing Company |
| Total Pages | : 202 |
| Release | : 1997-06-19 |
| Genre | : Science |
| ISBN | : 9813105011 |
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The success in the standard model and to the continuing research for a better understanding of the quantum chromodynamics has resulted in a great interest in spin physics among high energy and nuclear physics. Advances in accelerator technology have also spurred renewed interest in accelerating and storing highly aligned spin particles in synchrotrons and storage rings. The development of polarized ion sources and polarized electron sources have seen remarkable progress. With these advances in ion sources, there is a growing interest in the acceleration and maintenence of this polarization.This book is intended to be used as a graduate/senior undergraduate textbook in accelerator physics and sciences. The subject deals with acceleration and storage of polarized beams in high energy synchrotrons. The material covers the equation of motion for polarized beams in synchrotrons, spin depolarizing resonances, practical methods used in overcoming spin resonances, effects of spin rotators — called Siberian snakes — on the polarization vector, snake resonances, Sokolov-Ternov radiative polarization of electrons, and design principles of spin rotators. Experimental results of many polarized beam experiments are compared with theoretical analyses.Each chapter is also followed by exercises, which are intended to reinforce the concepts discussed, to derive useful formulae for applications, and to provide an introduction to some published literatures related to the polarized beam dynamics.
Perturbative Quantum Chromodynamics
| Author | : A. H. Mueller |
| Publisher | : World Scientific |
| Total Pages | : 626 |
| Release | : 1989 |
| Genre | : Science |
| ISBN | : 9789971505646 |
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This book will be of great interest to advanced students and researchers in the area of high energy theoretical physics. Being the most complete and updated review volume on Perturbative QCD, it serves as an extremely useful textbook or reference book. Some of the reviews in this volume are the best that have been written on the subject anywhere.
