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Title: | Chiral low-energy constants L10 and C87 from hadronic τ decays |
Authors: | González-Alonso, Martín CSIC ORCID; Piedra, Antonio; Prades, Joaquim | Issue Date: | Jan-2009 | Publisher: | Elsevier | Citation: | Nuclear Physics B Proceedings Supplements 186: 171-174 (2009) | Abstract: | Using 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, we get accurate values for the QCD chiral order parameters L_10 and C_87. At order p^4 we obtain L_10^r(M_rho)=-(5.22+-0.06)10^-3, whereas at order p^6 we get L_10^r(M_rho)=-(4.06+-0.39)10^-3 and C_87^r(M_rho) = (4.89+-0.19)10^-3 GeV^-2. | Description: | 4 páginas, 1 figura.-- Comunicación presentada a la 14ª High-Energy Physics International Conference On Quantum ChromoDynamics (QCD), celebrada en Julio de 2008 en Montpellier (Francia).-- arXiv:0810.2459v2. | Publisher version (URL): | http://dx.doi.org/10.1016/j.nuclphysbps.2008.12.040 | URI: | http://hdl.handle.net/10261/33023 | DOI: | 10.1016/j.nuclphysbps.2008.12.040 | ISSN: | 0920-5632 |
Appears in Collections: | (IFIC) Artículos |
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