Published August 1996 | Version v1
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Some new results in O(a) improved lattice QCD

Creators

  • 1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  • 2. Max-Planck-Institut fuer Physik, Muenchen (Germany)
  • 3. Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany). Inst. fuer Hochenergiephysik
  • 4. European Lab. for Particle Physics (CERN), Geneva (Switzerland)
  • 5. Forschungszentrum Juelich GmbH (Germany). Hoechstleistungsrechenzentrum
  • 6. Humboldt-Universitaet, Berlin (Germany). Inst. fuer Physik

Description

It is shown how on-shell O(a) improvement can be implemented non-perturbatively in lattice QCD with Wilson quarks. Improvement conditions are obtained by requiring the PCAC relation to hold exactly in certain matrix elements. These are derived from the QCD Schroedinger functional which enables us to simulate directly at vanishing quark masses. In the quenched approximation and for bare couplings in the range 0≤g0≤1, we determine the improved action, the improved axial current, the additive renormalization of the quark mass and the isospin current normalization constants ZA and ZV. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

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Additional details

Publishing Information

Imprint Pagination
10 p.
ISSN
0418-9833
Report number
DESY--96-157

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
28006433
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
AXIAL-VECTOR CURRENTS; CHIRALITY; COUPLING CONSTANTS; FUNCTIONALS; ISOSPIN; LATTICE FIELD THEORY; MASS RENORMALIZATION; MASSLESS PARTICLES; MATRIX ELEMENTS; PCAC THEORY; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; QUARKS; REST MASS; SCHROEDINGER PICTURE; VECTOR CURRENTS; WARD IDENTITY
Descriptors DEC
ALGEBRAIC CURRENTS; CONSTRUCTIVE FIELD THEORY; CURRENTS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; MASS; PARTICLE PROPERTIES; QUANTUM FIELD THEORY; RENORMALIZATION

Optional Information

Secondary number(s)
CERN-TH--96-217; HEP-LAT--9608049.