Ref HAL: hal-00266461_v1
Ref Arxiv: hep-ph/0412152
DOI: 10.1016/j.physletb.2005.08.007
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
77 citations
Résumé:

ALEPH/OPAL data on the V-A spectral functions from hadronic tau decays are used in connection with a set of Laplace transform sum rules (LSR) for fixing the size of the QCD vacuum condensates up to dimension 18. Our results favour the ones from large-N_c QCD within the Minimal Hadronic Approximation (MHA) and show a violation of about a factor 2-5 of the vacuum saturation estimate of the dimension-six to -ten condensates. We scrutinize the different determinations of the QCD vacuum condensates using tau-decays data. After revisiting some of the existing results, we present coherent values of the condensates from different methods.