Landau-gauge propagators in Yang-Mills theories at beta=0: Massive solution versus conformal scaling

Autor(es)

Cucchieri, A. ^[1] ; Mendes, T. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] DESY Zeuthen, D-15738 Zeuthen - Germany

• Tipo de documento: Artigo de Revisão
• Fonte: Physical Review D; v. 81, n. 1 JAN 2010.
• Citações Web of Science: 92

Resumo

We study Landau-gauge gluon and ghost propagators in Yang-Mills theories at lattice parameter beta = 0, considering relatively large lattice volumes for the case of the SU(2) gauge group in three and four space-time dimensions. We compare the lattice data to the so-called massive and conformal-scaling solutions, examining the requirements for a good description of the propagators over various ranges of momenta and discussing possible systematic errors. Our analysis strongly supports the massive solution, i.e. a finite gluon propagator and an essentially free ghost propagator in the infrared limit, in disagreement with A. Sternbeck and L. von Smekal, arXiv:0811.4300.. Moreover, we argue that discretization effects play no role in the analysis of these propagators. (AU)

• Processo FAPESP: 04/08928-3 - Desenvolvimento e aplicação de métodos computacionais de alto desempenho para análise de sistemas físicos e biológicos
• Beneficiário: Luiz Nunes de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários