6533b7cffe1ef96bd1257cf9
RESEARCH PRODUCT
ChPT parameters from tau-decay data
A. Rodríguez-sánchezMartín González-alonsoAntonio Pichsubject
Chiral anomalyPhysicsQuantum chromodynamicsNuclear and High Energy PhysicsParticle physicsChiral perturbation theory010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyFOS: Physical sciencesDuality (optimization)01 natural sciencesHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Nambu–Jona-Lasinio model0103 physical sciencesHigh Energy Physics::ExperimentOperator product expansion010306 general physicsChiral symmetry breakingParametrizationdescription
Using the updated ALEPH V-A spectral function from tau decays, we determine the lowest spectral moments of the left-right correlator and extract dynamical information on order parameters of the QCD chiral symmetry breaking. Uncertainties associated with violations of quark-hadron duality are estimated from the data, imposing all known short-distance constraints on a resonance-based parametrization. Employing proper pinched weight functions, we obtain an accurate determination of the effective chiral couplings L10 and C87 and the dimension-six and -eight contributions in the Operator Product Expansion.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-09-28 |