6533b7cefe1ef96bd1257297

RESEARCH PRODUCT

Updated determination of chiral couplings and vacuum condensates from hadronic tau decay data

Antonio PichA. Rodríguez-sánchezMartín González-alonso

subject

PhysicsAlephParticle physicsChiral perturbation theory010308 nuclear & particles physicsHadronDuality (optimization)FOS: Physical sciencesCorrelation function (quantum field theory)01 natural sciences3. Good healthHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]0103 physical sciencesStatistical analysisHigh Energy Physics::ExperimentOperator product expansionSpectral function010306 general physics

description

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 tau 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.

10.1103/physrevd.94.014017http://hal.in2p3.fr/in2p3-01289897