Download or read book Higher Twist Corrections to Nucleon Structure Functions from Lattice QCD written by and published by . This book was released on 1999 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Moments of the Nucleon Structure Function F2 written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental data on the F2 structure functions of the proton and deuteron, including recent results from CLAS at Jefferson Lab, have been used to construct their n=12 moments. A comprehensive analysis of the moments in terms of the operator product expansion has been performed to separate the moments into leading and higher twist contributions. Particular attention was paid to the issue of nuclear corrections in the deuteron, when extracting the neutron moments from data. The difference between the proton and neutron moments was compared directly with lattice QCD simulations. Combining leading twist moments of the neutron and proton we found the d/u ratio at x-1 approaching 0, although the precision of the data did not allow to exclude the 1/5 value. The higher twist components of the proton and neutron moments suggest that multi-parton correlations are isospin independent.

Download or read book Polarized and unpolarized nucleon structure functions from lattice QCD written by and published by . This book was released on 1995 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nucleon Structure at Large Bjorken X written by Claude Bourrely and published by American Institute of Physics. This book was released on 2005-03-03 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marseille, France, 26-28 July 2004

Download or read book Recent Results on the Nucleon Structure Functions from Lattice QCD written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Qcd Corrections And New Physics Proceedings Of The International Symposium written by Jiro Kodaira and published by World Scientific. This book was released on 1998-09-02 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses recent developments in both the theoretical and the experimental aspects of QCD. Its main goal is to establish precise predictions of the Standard Model in order to find clues to the discovery of New Physics.

Download or read book New Results on Nucleon Spin Structure written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structure Of Vacuum And Elementary Matter Proceedings Of The International Symposium On Nuclear Physics At The Turn Of The Millennium written by Horst Stocker and published by World Scientific. This book was released on 1997-05-02 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Nuclear Physics at the Turn of the Millennium: Structure of Vacuum and Elementary Matter, held on March 10th to March 16th, 1996 at Wilderness/George, South Africa, is in honor of the 60th birthday of Prof Walter Greiner. Topics included: Supercritical Fields and Pair-Production in Heavy-Ion Collisions; Superheavy Nuclei, Exotic Nuclear States and Decays; Superdense Matter in Relativistic Heavy-Ion Collisions: Collective Flow, Particle Production and the Nuclear Equation of State, Phase Transitions in QCD, Strange Matter and Signatures of the Quark Gluon Plasma.

Download or read book Deep Inelastic Scattering Dis 2001 Procs Of The 9th Intl Workshop written by Graziano Bruni and published by World Scientific. This book was released on 2002-10-18 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of DIS 2001 present the most updated status of deep inelastic scattering (DIS) physics. Topics like structure function measurements and phenomenology, QCD studies in DIS and photoproduction, spin physics and diffractive interactions are reviewed in detail, with emphasis on those studies that push the test of QCD and the Standard Model to the limits of their present range of validity, towards both the very high and the very low four-momentum transfers in the lepton-proton scattering. Moreover, this workshop coincided with the transition between the first period of experimentation at the HERA ep collider at DESY and the start of the updated HERA II operation — allowing a review of what has been learned up to now and a discussion on the main future directions of research in this field.

Download or read book The 9th International Workshop on Deep Inelastic Scattering DIS 2001 written by G. Bruni and published by World Scientific. This book was released on 2002 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of DIS 2001 present the most updated status of deep inelastic scattering (DIS) physics. Topics like structure function measurements and phenomenology, QCD studies in DIS and photoproduction, spin physics and diffractive interactions are reviewed in detail, with emphasis on those studies that push the test of QCD and the Standard Model to the limits of their present range of validity, towards both the very high and the very low four-momentum transfers in the lepton-proton scattering. Moreover, this workshop coincided with the transition between the first period of experimentation at the HERA ep collider at DESY and the start of the updated HERA II operation -- allowing a review of what has been learned up to now and a discussion on the main future directions of research in this field.

Download or read book Nuclear Physics written by and published by . This book was released on 2004 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Lattice QCD Results on Nucleon Structure written by Konstantinos Orginos and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I review recent developments in lattice calculations of nucleon structure. In particular, I cover the calculations of nucleon matrix elements related to generalized parton distribution functions, structure functions and form factors.

Download or read book Higher Twists in Spin Structure Functions from a constituent Quark Point of View written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss the implications of a ''constituent quark'' structure of the nucleon for the leading (1/Q[sup 2-]) power corrections to the spin structure functions. Our basic assumption is the presence of quark-gluon correlations in the nucleon wave function, whose size, [rho] [approx] 0.3 fm, is small compared to the nucleon radius, R (two-scale picture). We argue that in this picture the isovector twist-4 matrix element in the proton has a sizable negative value, M[sub N][sup 2]f[sub 2][sup u-d] [approx] [rho][sup -2], while the twist-3 matrix elements are small, M[sub N][sup 2]d[sub 2] [approx] R[sup -2]. These findings are in agreement with the result of a QCD fit to g[sub 1] world data, including recent neutron data from HERMES and Jefferson Lab Hall A, which gives M[sub N][sup 2]f[sub 2][sup u-d] = -0.28 [+-] 0.08 GeV[sup 2].

Download or read book The Spin Structure Of The Nucleon written by Bernard Frois and published by World Scientific. This book was released on 1998-02-24 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: From its early beginnings at SLAC in the 1970's, the study of nucleon spin structure using polarized lepton beams and polarized nucleon targets has become increasingly important in nuclear and particle physics, with current experiments at several of the world's high energy and nuclear physics laboratories (CERN, DESY, SLAC and Jefferson Lab) and with enormous related theoretical studies. The understanding of the fascinating but complicated problem of nucleon spin structure has progressed substantially, but fundamental questions remain and it can be confidently predicted that future activity will be high.The Erice Course on The Spin Structure of the Nucleon covered both the experimental and theoretical aspects of the subject, and this volume includes the lectures given at the School. In many cases the lecture material has been extended and updated by the authors. In addition, several recent publications on experimental work have been added in an appendix.

Download or read book Improved QCD Sum Rule Estimates of the Higher Twist Contributions to Polarised and Unpolarised Nucleon Structure Functions written by Graham G. Ross and published by . This book was released on 1993 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book From Parity Violation to Hadronic Structure and more written by K. de Jager and published by Springer Science & Business Media. This book was released on 2008-06-21 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the proceedings of the third international workshop on From Parity Violation to Hadronic Structure and More. The many applications of parity violation are way beyond the scope of what Lee and Yang could have imagined fifty years after their proposal. For the physics topics discussed during this workshop, the application of parity violation has become a standard work horse allowing for the extraction of many physics topics in different experiments.

Download or read book Proceedings of the First Workshop on Quark Hadron Duality and Transition to PQCD written by Alessandra Fantoni and published by World Scientific. This book was released on 2006 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: While perturbative QCD methods fully describe experimental results at high energies, and chiral perturbation theory is the low energy effective theory of the strong interactions, a form of duality is observed connecting these two regimes. In these intermediate kinematics, a wide variety of reactions are observed which can be described simultaneously by single particle (quark) scattering, and by exclusive resonance (hadron) scattering. The contributions in this proceedings volume discuss recent and existing results, and aim to foster current and future research, investigating the phenomenon of quark-hadron duality. This unique volume contains research work by scientists from different arenas of hadronic physics, dealing with different manifestations of quark-hadron duality. Sample Chapter(s). Chapter 1: Introductory Remarks on Duality in Lepton-Hadron Scattering (490 KB). Contents: Introduction and Review: Experimental and Theoretical Status: Duality in the Polarized Structure Functions (H P Blok); Spin Structure of the Nucleon and Aspects of Duality (Z E Meziani); Duality and Confinement: Quark Models of Duality in Electron and Neutrino Scattering (W Melnitchouk); Hadron Structure on the Back of an Envelope (A W Thomas et al.); Spin-Flavor Decomposition and in Polarized Semi-Inclusive Deep Inelastic Scattering Experiments at Jefferson Lab (X Jiang); Duality in Photoproduction: Duality in Vector-Meson Production (A Donnachie); Onset of Scaling in Exclusive Processes (M Mirazita); Duality in Nuclei: A Partonic Picture of Jet Fragmentation in Nuclei (X-N Wang); Quark Gluon Plasma and Hadronic Gas on the Lattice (M P Lombardo); Duality in Neutrino Experiments: Neutrinos and Local Duality (F Steffens & K Tsushima); Duality and QCD: Higher Twist Effects in Polarized DIS (E Leader et al.); Highly Excited Hadrons in QCD and Beyond (M Shifman); Future Perspectives: Transverse Polarization and Quark-Hadron Duality (O V Teryaev); Research Perspectives with the Jefferson Lab (K de Jager); Perspectives with PANDA (P Gianotti); Summary Talk (P Hoyer); and other papers. Readership: Researchers, academics and lecturers in high energy, particle and nuclear physics.