THE VECTOR AND AXIAL-VECTOR COUPLING-CONSTANTS OF THE NUCLEON IN CAVITY QCD TO ORDER ALPHA(S)

Authors
PAGE PR LINDEBAUM RJ VIOLLIER RD
Citation
Pr. Page et al., THE VECTOR AND AXIAL-VECTOR COUPLING-CONSTANTS OF THE NUCLEON IN CAVITY QCD TO ORDER ALPHA(S), Nuclear physics. A, 560(4), 1993, pp. 1003-1013
Citations number
29
Categorie Soggetti
Physics, Nuclear
Journal title
Nuclear physics. A → ACNP
ISSN journal
03759474
Volume
560
Issue
4
Year of publication
1993
Pages
1003 - 1013
Database
ISI
SICI code
0375-9474(1993)560:4<1003:TVAACO>2.0.ZU;2-D
Abstract
The cavity regularization technique, originally developed for self-ene rgies, is adapted to the calculation of vertex diagrams in the framewo rk of cavity field theory. As a test of this method, the vector and ax ial-vector coupling constants of the nucleon are computed to order alp ha(s). Logarithmic divergences of the various Feynman diagrams cancel for massless quarks, yielding g(V) = 1.0000 and g(A) = 1.0883 + 0.2425 alpha(s), independent of the gauge and renormalisation scheme.