The vector form factor of the pion from unitarity and analyticity: a model-independent approach
| dc.creator | Pich, A. | |
| dc.creator | Portoles, J. | |
| dc.date | 2001-01-17 | |
| dc.date.accessioned | 2026-07-07T10:32:48Z | |
| dc.date.available | 2026-07-07T10:32:48Z | |
| dc.description | We 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 sqrt(s) ~ 1.2 GeV and allows a model-independent determination of the mass of the rho(770) resonance, M(rho) = (775.1 +- 0.5) MeV. We analyse the experimental data on tau(-) -> pion(-) pion(0) neutrino(tau), 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, a_muon, and to the fine structure constant, alpha(M(Z)^2), is also performed. | |
| dc.description | 1+15 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0101194 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0101194 | |
| dc.identifier | Phys.Rev.D63:093005,2001 | |
| dc.identifier | doi:10.1103/PhysRevD.63.093005 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/178883 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | The vector form factor of the pion from unitarity and analyticity: a model-independent approach | |
| dc.type | text |