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Chiral Low-energy Constants from Tau Data by Gonzalez-Alonso, M.; Pich, A.; Prades, J. is a scholarly article available to read on EtoBox.

What is Chiral Low-energy Constants from Tau Data about?

We analyze how the recent precise hadronic tau-decay data on the V-A spectral function and general properties of QCD such as analyticity, the operator product expansion and chiral perturbation theory (ChPT), can be used to improve the knowledge of some of the low-energy constants of ChPT. In particular we find the most precise values of L_{9,10} (or equivalently l_{5,6}) at order p^4 and p^6 and the first phenomenological determination of C_87 (c_50).

Author

Gonzalez-Alonso, M.; Pich, A.; Prades, J.

Published

2009

Language

EN