Updated determination of chiral couplings and vacuum condensates from hadronic τ decay data
Research output: Contribution to journal › Article
We analyze the lowest spectral moments of the left-right two-point correlation function, using all known short-distance constraints and the recently updated ALEPH V-A spectral function from τ decays. This information is used to determine the low-energy couplings L10 and C87 of chiral perturbation theory and the lowest-dimensional contributions to the operator product expansion of the left-right correlator. A detailed statistical analysis is implemented to assess the theoretical uncertainties, including violations of quark-hadron duality.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Journal||Physical Review D|
|Publication status||Published - 2016 Jul 15|