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Title

Vector form factor of the pion : A model-independent approach

AuthorsPich, Antonio CSIC ORCID; Portolés, Jorge CSIC ORCID
Issue DateJun-2003
PublisherElsevier
CitationNuclear Physics B Proceedings Supplements 121: 179-182 (2003)
AbstractWe study a model-independent parameterization of the vector pion form factor that arises from the constraints of analyticity and unitarity. Our description should be suitable up to √s 1.2 GeV and allows a model-independent determination of the mass of the (770) resonance. We analyse the experimental data on τ− → π−π0ντ and e+e− → π+π− in this framework, and its consequences on the low-energy observables worked out by chiral perturbation theory. An evaluation of the two pion contribution to the anomalous magnetic moment of the muon, aμ, and to the fine structure constant, α(MZZ2), is also performed.
Description4 páginas, 2 figuras, 3 tablas.-- Comunicación presentada a la 9ª High-Energy Physics International Conference on Quantum ChromoDynamics (QCD 02) celebrada del 2 al 9 de Julio de 2002 en Montpellier (Francia).-- arXiv:hep-ph/0209224v1
Publisher version (URL)http://dx.doi.org/10.1016/S0920-5632(03)01841-3
URIhttp://hdl.handle.net/10261/33146
DOI10.1016/S0920-5632(03)01841-3
ISSN0920-5632
Appears in Collections:(IFIC) Artículos




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