Skip to Main content Skip to Navigation
Conference papers

ChPT parameters from tau-decay data

Abstract : 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.
Document type :
Conference papers
Complete list of metadata
Contributor : Dominique Girod Connect in order to contact the contributor
Submitted on : Thursday, October 15, 2015 - 11:23:56 AM
Last modification on : Friday, September 10, 2021 - 1:50:14 PM

Links full text




A. Rodríguez-Sánchez, M. González-Alonso, A. Pich. ChPT parameters from tau-decay data. 18th High-Energy Physics International Conference in Quantum Chromodynamics (QCD 15), Jun 2015, Montpellier, France. pp.108-112, ⟨10.1016/j.nuclphysbps.2016.02.023⟩. ⟨in2p3-01215889⟩



Les métriques sont temporairement indisponibles