Low-energy constants and condensates from ALEPH hadronic $\tau$ decay data
High Energy Physics - Phenomenology
2015-12-09 v1 High Energy Physics - Lattice
Abstract
We determine the NLO chiral low-energy constant , and combinations , , , and , of the NNLO chiral low-energy constants incorporating recently revised ALEPH results for the non-strange vector () and axial-vector () hadronic decay distributions and recently updated RBC/UKQCD lattice data for the non-strange two-point function. In the scheme, at renormalization scale , we find , , , , , and . With errors here at or below the level expected for contributions of yet higher order in the chiral expansion, the analysis exhausts the possibilities of what can be meaningfully achieved in an NNLO analysis. We also consider the dimension six and dimension eight coefficients in the operator product expansion in the channel.
Keywords
Cite
@article{arxiv.1503.03450,
title = {Low-energy constants and condensates 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:1503.03450},
year = {2015}
}
Comments
16 pages, revtex