Low-energy constants from ALEPH hadronic tau decay data

2015/09/27 by Diogo Boito, Boito, Diogo, Anthony Francis +12
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph

paper · pdf · doi:10.48550/arxiv.1509.08125

6 pages, contribution to the proceedings of Chiral Dynamics 2015; reference corrected

openalex publication_date 2015/09/27 · arxiv created 2015/09/30 · arxiv updated 2015/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We determined the NLO chiral low-energy constant L₁₀, and various combinations of NNLO chiral low-energy constants employing recently revised ALEPH results for the non-strange vector (V) and axial-vector (A) hadronic tau decay distributions and recently updated RBC/UKQCD lattice data for the non-strange V-A two-point function. In this talk, we explain the ingredients of this determination. Our errors are at or below the level expected for contributions of yet higher order in the chiral expansion, suggesting that our results exhaust the possibilities of what can be meaningfully achieved in an NNLO analysis.

Related

• Determination of Low Energy Constants and testing Chiral Perturbation Theory at Next to Next to Leading Order
• ChPT parameters from tau-decay data
• NLO and NNLO Low Energy Constants for SU(2) Chiral Perturbation Theory
• L₁₀^r From a Combined NNLO Lattice, Continuum Analysis of the Light Quark V-A Correlator
• Fully differential NLO predictions for rare and radiative lepton decays