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Author: Steven D. Bass Publisher: World Scientific ISBN: 9812709460 Category : Science Languages : en Pages : 212
Book Description
One of the main challenges in nuclear and particle physics in the last 20 years has been to understand how the proton's spin is built up from its quark and gluon constituents. Quark models generally predict that about 60% of the proton's spin should be carried by the spin of the quarks inside, whereas high energy scattering experiments have shown that the quark spin contribution is small - only about 30%. This result has been the underlying motivation for about 1000 theoretical papers and a global program of dedicated spin experiments at BNL, CERN, DESY and Jefferson Laboratory to map the individual quark and gluon angular momentum contributions to the proton's spin, which are now yielding exciting results. This book gives an overview of the present status of the field: what is new in the data and what can be expected in the next few years. The emphasis is on the main physical ideas and the interpretation of spin data. The interface between QCD spin physics and the famous axial U(1) problem of QCD (eta and etaprime meson physics) is also highlighted. Book jacket.
Author: Steven D. Bass Publisher: World Scientific ISBN: 9812709460 Category : Science Languages : en Pages : 212
Book Description
One of the main challenges in nuclear and particle physics in the last 20 years has been to understand how the proton's spin is built up from its quark and gluon constituents. Quark models generally predict that about 60% of the proton's spin should be carried by the spin of the quarks inside, whereas high energy scattering experiments have shown that the quark spin contribution is small - only about 30%. This result has been the underlying motivation for about 1000 theoretical papers and a global program of dedicated spin experiments at BNL, CERN, DESY and Jefferson Laboratory to map the individual quark and gluon angular momentum contributions to the proton's spin, which are now yielding exciting results. This book gives an overview of the present status of the field: what is new in the data and what can be expected in the next few years. The emphasis is on the main physical ideas and the interpretation of spin data. The interface between QCD spin physics and the famous axial U(1) problem of QCD (eta and etaprime meson physics) is also highlighted. Book jacket.
Author: Vladimir Pascalutsa Publisher: Morgan & Claypool Publishers ISBN: 168174919X Category : Science Languages : en Pages : 84
Book Description
Scattering of light by light is a fundamental process arising at the quantum level through vacuum fluctuations. This short book will explain how, remarkably enough, this quantum process can entirely be described in terms classical quantities. This description is derived from general principles, such as causality, unitarity, Lorentz, and gauge symmetries. The reader will be introduced into a rigorous formulation of these fundamental concepts, as well as their physical interpretation and applications.
Author: D. Drechsel Publisher: World Scientific ISBN: 9789810245740 Category : Science Languages : en Pages : 432
Book Description
The history of spin in general, and of the nucleon spin structure in particular, has been full of surprises. For the past 25 years deep inelastic lepton scattering has been studied to determine the carriers of the nucleon spin. However, it was realized only recently that a full understanding of the nucleon spin will also require detailed information on the helicity structure in the resonance region, i.e. in the realm of nonperturbative QCD.This volume gives a status report on the spin structure in the nucleon resonance region, focusing on: new experimental results from SLAC and HERMES; a first glance at the JLab experiments to map out the spin structure functions at low and intermediate four-momentum transfers; the pioneering experiment at MAMI (Mainz) to determine the Gerasimov-Drell-Hearn sum rule for real photons; and recent theoretical concepts and investigations to describe the spin structure in the frameworks of higher twist expansion, phenomenological models and chiral perturbation theory.
Author: George B. Rybicki Publisher: John Wiley & Sons ISBN: 352761818X Category : Science Languages : en Pages : 402
Book Description
Radiative Processes in Astrophysics: This clear, straightforward, and fundamental introduction is designed to present-from a physicist's point of view-radiation processes and their applications to astrophysical phenomena and space science. It covers such topics as radiative transfer theory, relativistic covariance and kinematics, bremsstrahlung radiation, synchrotron radiation, Compton scattering, some plasma effects, and radiative transitions in atoms. Discussion begins with first principles, physically motivating and deriving all results rather than merely presenting finished formulae. However, a reasonably good physics background (introductory quantum mechanics, intermediate electromagnetic theory, special relativity, and some statistical mechanics) is required. Much of this prerequisite material is provided by brief reviews, making the book a self-contained reference for workers in the field as well as the ideal text for senior or first-year graduate students of astronomy, astrophysics, and related physics courses. Radiative Processes in Astrophysics also contains about 75 problems, with solutions, illustrating applications of the material and methods for calculating results. This important and integral section emphasizes physical intuition by presenting important results that are used throughout the main text; it is here that most of the practical astrophysical applications become apparent.
Author: Hsiang-nan Li Publisher: World Scientific ISBN: 9812799982 Category : Science Languages : en Pages : 250
Book Description
In this volume, recent theoretical and experimental progress in QCD phenomenology, neutrino physics, B physics and CP violation is reviewed. Contents: Lectures: Hadronic Light-Front Wavefunctions and QCD Phenomenology (S J Brodsky); Lectures on the Theory of Non-Leptonic B Decays (M Neubert); Neutrino Physics (P Vogel); Invited Talks: Recent Results from Lattice QCD on CP-PACS (S Aoki); QCD on a Transverse Lattice (M Burkardt & S Seal); QCD at the Tevatron and LHC (J Huston); Rare B Physics Results from BELLE (C H Wang); Recent BCP Progress in Taiwan (H-n Li); QCD-Improved Factorization in Nonleptonic B Decays (J Chay); Rare Radiative B Decays in Perturbative QCD (D Pirjol); Neutrino Experiments: Highlights (H T-K Wong); Neutrinos and Cosmology (S Pakvasa); Embed Zee Neutrino Mass Model into SUSY (K Cheung); Electroweak Sudakov Corrections at 2 Loop Level (H Kawamura). Readership: Graduate students, researchers and academics in particle physics.
Author: Jose Luis Goity Publisher: World Scientific ISBN: 9814544140 Category : Languages : en Pages : 356
Book Description
This volume contains the lectures presented at the 12th Annual Hampton University Graduate Studies at the Continuous Electron Beam Accelerator Facility (HUGS at CEBAF), which took place at Jefferson Lab and Hampton University from June 2nd to June 20th, 1997. It reflects the current quest for understanding strong interaction physics in the nonperturbative regime and its connections with the fundamental theory of the strong interactions, i.e. QCD. This quest is shaping current theoretical and experimental efforts in nuclear physics, as manifested by the experimental programs at Jefferson Lab and other facilities, and theoretical approaches that keep a rigorous connection with QCD, such as the method of chiral Lagrangians.
Author: Jos L. Goity Publisher: World Scientific ISBN: 9810247230 Category : Science Languages : en Pages : 495
Book Description
This book provides an authoritative, up to date, overview of the field of chiral dynamics, and also provides an excellent introduction to the field. The workshop is known for the interplay of theory and experiment and as a meeting place for most of the leading researchers in the field.
Author: H. Ögelman Publisher: Springer Science & Business Media ISBN: 9400922736 Category : Science Languages : en Pages : 760
Book Description
The idea for organizing an Advanced Study Institute devoted largely to neutron star timing arose independently in three places, at Istanbul, Garching and Amster dam; when we became aware of each other's ideas we decided to join forces. The choice of a place for the Institute, in Turkey, appealed much to us all, and it was then quickly decided that Qe§me would be an excellent spot. When the preparations for the Institute started, early in 1987, we could not have guessed how timely the subject actually was. Of course, the recently dis covered QPO phenomena in accreting neutron stars and half a dozen binary and millisecond radio pulsars known at the time formed one of the basic motivations for organizing this Institute. But none of us could have guessed that later in 1987 we were to witness the wonderful discovery of the binary and millisecond radio pulsars in globular clusters and, -as if Nature wished to give us a special present for this the discovery in March 1988 of a millisecond pulsar in an eclipsing binary Institu- system, the first eclipsing radio pulsar ever found, and the second fastest in the sky! The discussion of this pulsar, its formation and fate was one of the highlights of this meeting, especially since its discoverers were among the participants of the Institute and could provide us with first-hand information.
Author: Irinel Caprini Publisher: Springer ISBN: 3030189481 Category : Science Languages : en Pages : 139
Book Description
This book begins with a brief historical review of the early applications of standard dispersion relations in particle physics. It then presents the modern perspective within the Standard Model, emphasizing the relation of analyticity together with alternative tools applied to strong interactions, such as perturbative and lattice quantum chromodynamics (QCD), as well as chiral perturbation theory. The core of the book argues that, in order to improve the prediction of specific hadronic observables, it is often necessary to resort to methods of complex analysis more sophisticated than the simple Cauchy integral. Accordingly, a separate mathematical chapter is devoted to solving several functional analysis optimization problems. Their applications to physical amplitudes and form factors are discussed in the following chapters, which also demonstrate how to merge the analytic approach with statistical analysis tools. Given its scope, the book offers a valuable guide for researchers working in precision hadronic physics, as well as graduate students who are new to the field.
Author: Steven D. Bass
Author: Steven D. Bass
Author: Vladimir Pascalutsa
Author: D. Drechsel
Author: George B. Rybicki
Author: Amos de-Shalit
Author: Hsiang-nan Li
Author: Jose Luis Goity
Author: Jos L. Goity
Author: H. Ögelman
Author: Irinel Caprini