Finite Energy Chiral Sum Rules and Tau Spectral Functions

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dc.creatorDavier, M.
dc.creatorGirlanda, L.
dc.creatorHoecker, A.
dc.creatorStern, J.
dc.date1998-02-27
dc.date.accessioned2026-07-07T11:47:50Z
dc.date.available2026-07-07T11:47:50Z
dc.descriptionA combination of finite energy sum rule techniques and Chiral Perturbation Theory (ChPT) is used in order to exploit recent ALEPH data on the non-strange tau vector (V) and axial-vector (A) spectral functions with respect to an experimental determination of the ChPT quantity L_{10}. A constrained fit of R_{τ,V-A}^(k,l) inverse moments (l<0) and positive spectral moments (l>=0) adjusts simultaneously L_{10} and the nonperturbative power terms of the Operator Product Expansion. We give explicit formulae for the first k=0,1 and l=-1,-2 strange and non-strange inverse moment chiral sum rules to one-loop order generalized ChPT. Our final result reads L^r_{10}(M_ρ)=-(5.13 +/- 0.19)x10^{-3}, where the error includes experimental and theoretical uncertainties.
dc.descriptionLaTex, 20 pages, 5 figures (EPS)
dc.identifierhttps://arxiv.org/abs/hep-ph/9802447
dc.identifierhttp://arxiv.org/abs/hep-ph/9802447
dc.identifierPhys.Rev.D58:096014,1998
dc.identifierdoi:10.1103/PhysRevD.58.096014
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/202714
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleFinite Energy Chiral Sum Rules and Tau Spectral Functions
dc.typetext

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