https://doi.org/10.1140/epjc/s10052-010-1250-5
Regular Article - Theoretical Physics
Renormalizability of a quark–gluon model with soft BRST breaking in the infrared region
1
Theoretical division CERN, 1211, Genève 23, Switzerland
2
LPTHE, CNRS and Université Pierre et Marie Curie, 4 place Jussieu, 75252, Paris Cedex 05, France
3
Instituto de Física, Departamento de Física Teórica, UERJ—Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, 20550-013, Maracanã, Rio de Janeiro, Brazil
4
Instituto de Física, UFF—Universidade Federal Fluminense, Avenida Gal. Milton Tavares de Souza s/n, 24210-346, Niterói, Brazil
* e-mail: sorella@uerj.br
Received:
27
February
2009
Revised:
23
September
2009
Published online:
11
February
2010
We prove the renormalizability of a quark–gluon model with soft breaking of the BRST symmetry, which accounts for the modification of the large distance behavior of the quark and gluon correlation functions. The proof is valid to all orders of perturbation theory, by making use of softly broken Ward identities.
© Springer-Verlag / Società Italiana di Fisica, 2010
