Published March 18, 1991 | Version v1
Journal article Metadata-only

The improvement of hadronic matrix elements in lattice QCD

Creators

  • 1. Southampton Univ. (UK). Dept. of Physics
  • 2. Istituto Nazionale di Fisica Nucleare, Rome (Italy)
  • 3. Rome-1 Univ. (Italy). Dipt. di Fisica
  • 4. Istituto Nazionale di Fisica Nucleare, L'Aquila (Italy). Lab. Nazionali del Gran Sasso
  • 5. L'Aquila Univ. (Italy). Dipt. di Fisica

Description

We present a practical method to eliminate all terms of order a (a being the lattice spacing) in the calculation of hadronic matrix elements with Wilson fermions. The method is based on an 'improved' Wilson action combined with a suitable modification of the fermion operators. With this technique one expects to reduce significantly the systematic errors which arise due to the finiteness of the lattice spacing. We estimate that these errors will be reduced from about 20-30% (as found in recent numerical simulations) to just a few percent. (orig.)

Additional details

Publishing Information

Journal Title
Nuclear Physics B, Particle Physics
Journal Volume
352
Journal Issue
1
Series
Nucl. Phys. B, Part. Phys.
Journal Page Range
266-288
ISSN
0550-3213
CODEN
NUPBB

INIS

Country of Publication
Netherlands
Country of Input or Organization
Netherlands
INIS RN
22053873
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ACTION INTEGRAL; COMPUTERIZED SIMULATION; CORRELATION FUNCTIONS; DIRAC OPERATORS; ERRORS; FIELD OPERATORS; FOURIER TRANSFORMATION; HADRONS; LATTICE FIELD THEORY; LATTICE PARAMETERS; MATRIX ELEMENTS; QUANTUM CHROMODYNAMICS; QUARKS; SPINOR FIELDS; SU-3 GROUPS; UNIFIED GAUGE MODELS; VERTEX FUNCTIONS; YANG-MILLS THEORY
Descriptors DEC
CONSTRUCTIVE FIELD THEORY; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; FUNCTIONS; INTEGRAL TRANSFORMATIONS; INTEGRALS; LIE GROUPS; MATHEMATICAL MODELS; MATHEMATICAL OPERATORS; PARTICLE MODELS; POSTULATED PARTICLES; QUANTUM FIELD THEORY; QUANTUM OPERATORS; SIMULATION; SU GROUPS; SYMMETRY GROUPS; TRANSFORMATIONS