Dispersive Techniques for $α_s$, $R_{had}$ and Instability of the Perturbative Vacuum

Simple item page
dc.creatorSrivastava, Y.
dc.creatorPacetti, S.
dc.creatorPancheri, G.
dc.creatorWidom, A.
dc.date2001-06-01
dc.date2001-06-29
dc.date.accessioned2026-07-07T03:44:40Z
dc.date.available2026-07-07T03:44:40Z
dc.descriptionRecent dispersive techniques developed by us are applied to discuss three problems: 1. A long standing discrepan-cy between the measurements of $R(s)$ for $\sqrt{s} = (5÷7.5)GeV$ by Crystal Ball and MARK I has been analyzed and its consequences analyzed for the number of contributing quarks. 2. Noting that the perturbative $α_s$ has the wrong analyticity, analytic models consistent with asymptotic freedom (AF) and confinement have been constructed and applied to discuss $τ$ decay. 3. It is shown that AF leads to a wrong sign for $\im\big(α(s)\big)$ which signals an instability of the perturbative QCD vacuum.
dc.description4 pages, 4 figures, e^+e^- Physics at Intermediate Energies Workshop - Contribution T19
dc.identifierhttps://arxiv.org/abs/hep-ph/0106005
dc.identifierhttp://arxiv.org/abs/hep-ph/0106005
dc.identifiereConf C010430 (2001) T19
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/40659
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDispersive Techniques for $α_s$, $R_{had}$ and Instability of the Perturbative Vacuum
dc.typetext

Files

Collections

arXiv