Hadron Structure in Lattice QCD
Author | : Suzhou Huang |
Publisher | : |
Total Pages | : 134 |
Release | : 1988 |
Genre | : |
ISBN | : |
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Author | : Suzhou Huang |
Publisher | : |
Total Pages | : 134 |
Release | : 1988 |
Genre | : |
ISBN | : |
Author | : Triumf |
Publisher | : |
Total Pages | : 2 |
Release | : 1986 |
Genre | : |
ISBN | : |
Author | : Anthony Thomas |
Publisher | : |
Total Pages | : |
Release | : 2006 |
Genre | : |
ISBN | : |
Author | : Huey-Wen Lin |
Publisher | : Springer |
Total Pages | : 255 |
Release | : 2014-11-21 |
Genre | : Science |
ISBN | : 3319080229 |
With ever increasing computational resources and improvements in algorithms, new opportunities are emerging for lattice gauge theory to address key questions in strongly interacting systems, such as nuclear matter. Calculations today use dynamical gauge-field ensembles with degenerate light up/down quarks and the strange quark and it is possible now to consider including charm-quark degrees of freedom in the QCD vacuum. Pion masses and other sources of systematic error, such as finite-volume and discretization effects, are beginning to be quantified systematically. Altogether, an era of precision calculation has begun and many new observables will be calculated at the new computational facilities. The aim of this set of lectures is to provide graduate students with a grounding in the application of lattice gauge theory methods to strongly interacting systems and in particular to nuclear physics. A wide variety of topics are covered, including continuum field theory, lattice discretizations, hadron spectroscopy and structure, many-body systems, together with more topical lectures in nuclear physics aimed a providing a broad phenomenological background. Exercises to encourage hands-on experience with parallel computing and data analysis are included.
Author | : Robert Edwards |
Publisher | : |
Total Pages | : |
Release | : 2006 |
Genre | : |
ISBN | : |
The structure of neutrons, protons, and other strongly interacting particles is now being calculated in full, unquenched lattice QCD with quark masses entering the chiral regime. This talk describes selected examples, including the nucleon axial charge, structure functions, electromagnetic form factors, the origin of the nucleon spin, the transverse structure of the nucleon, and the nucleon to Delta transition form factor.
Author | : Dru B. Renner |
Publisher | : |
Total Pages | : 22 |
Release | : 2010 |
Genre | : |
ISBN | : |
Author | : Ming-Chung Chu |
Publisher | : |
Total Pages | : 18 |
Release | : 1990 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 12019 |
Release | : 2007 |
Genre | : |
ISBN | : |
Early scattering experiments revealed that the proton was not a point particle but a bound state of many quarks and gluons. Deep inelastic scattering (DIS) experiments have accurately determined the probability of struck quarks carrying a fraction of the proton's momentum. The current generation of experiments and Lattice QCD calculations will provide detailed multi-dimensional pictures of the distributions of quarks and gluons inside the proton.
Author | : Jeremy Russell Green |
Publisher | : |
Total Pages | : |
Release | : 2013 |
Genre | : |
ISBN | : |
Lattice QCD allows us to study the structure of hadrons from first-principles calculations of quantum chromodynamics. We present calculations that shed light on the behavior of quarks inside hadrons in both qualitative and quantitative ways. The first is a study of diquarks. We bind two quarks in a baryon with a static quark and compute the simultaneous two-quark density, including corrections for periodic boundary conditions. Defining a correlation function to isolate the intrinsic correlations of the diquark, we find that away from the immediate vicinity of the static quark, the diquark has a consistent shape, with much stronger correlations seen in the scalar diquark than in the axial-vector diquark. We present results at pion masses 293 and 940 MeV and discuss the dependence on the pion mass. The second set of calculations is a more quantitative study that covers a wide range of (mainly isovector) nucleon observables, including the Dirac and Pauli radii, the magnetic moment, the axial charge, and the average quark momentum fraction. Two major advances over previous calculations are the use of a near-physical pion mass, which nearly eliminates the uncertainty associated with extrapolation to the physical point, and the control over systematic errors caused by excited states, which is a significant focus of this thesis. Using pion masses as low as 149 MeV and spatial box sizes as large as 5.6 fm, we show the importance of good control over excited states for obtaining successful postdictions -- which we achieve for several quantities -- and we identify a remaining source of systematic error that is likely responsible for disagreement with experiment in the axial sector. We then use this understanding of systematics to make predictions for observables that have not been measured experimentally.
Author | : |
Publisher | : |
Total Pages | : 10 |
Release | : 1999 |
Genre | : |
ISBN | : |