Low-energy constants from ALEPH hadronic tau decay data
High Energy Physics - Phenomenology
2015-10-01 v2 High Energy Physics - Lattice
Abstract
We determined the NLO chiral low-energy constant , 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.
Keywords
Cite
@article{arxiv.1509.08125,
title = {Low-energy constants from ALEPH hadronic tau decay data},
author = {Diogo Boito and Anthony Francis and Maarten Golterman and Renwick Hudspith and Randy Lewis and Kim Maltman and Santiago Peris},
journal= {arXiv preprint arXiv:1509.08125},
year = {2015}
}
Comments
6 pages, contribution to the proceedings of Chiral Dynamics 2015; reference corrected