Mesonic correlation functions in the NJL model with vector mesons

Autor: E. Ruiz Arriola, R. M. Davidson
Přispěvatelé: Theoretical High Energy Physics (IHEF, IoP, FNWI)
Rok vydání: 1995
Předmět:
Zdroj: Physics Letters B, 359. Elsevier
ISSN: 0370-2693
DOI: 10.1016/0370-2693(95)01119-b
Popis: We compute mesonic correlation functions in Euclidean coordinate space within the Nambu and Jona-Lasinio model with explicit scalar, pseudoscalar, vector and axial-vector couplings. After bosonization and application of the Pauli-Villars regularization method, we verify that the relevant dispersion relations are satisfied in the model, and use them to evaluate the point to point correlatorsin several channels, namely σ, π, ϱ and A . The results are not very sensitive to the particular value of the vector coupling constant, G ν . We also discuss and compare with the corresponding calculations in lattice QCD in the quenched approximation and the random instanton liquid model.
Databáze: OpenAIRE