Show simple item record

dc.contributor.authorAhmady, M. R.
dc.contributor.authorChishtie, F. A.
dc.contributor.authorElias, V.
dc.contributor.authorFariborz, A. H.
dc.contributor.authorMcKeon, D. G. C.
dc.contributor.authorSherry, T. N.
dc.contributor.authorSquires, A.
dc.contributor.authorSteele, T. G.
dc.date.accessioned2018-08-24T08:23:59Z
dc.date.available2018-08-24T08:23:59Z
dc.date.issued2003-02-26
dc.identifier.citationAhmady, M. R. Chishtie, F. A.; Elias, V.; Fariborz, A. H.; McKeon, D. G. C.; Sherry, T. N.; Squires, A.; Steele, T. G. (2003). Optimal renormalization-group improvement of the perturbative series for thee+e−annihilation cross section. Physical Review D 67 (3),
dc.identifier.issn0556-2821,1089-4918
dc.identifier.urihttp://hdl.handle.net/10379/8820
dc.description.abstractUsing renormalization-group methods, we derive differential equations for the all-orders summation of logarithmic corrections to the QCD series for R(s)=sigma(e(+)e(-)-->hadrons)/sigma(e(+)e(-)-->mu(+)mu(-)), as obtained from the imaginary part of the purely perturbative vector-current correlation function. We present explicit solutions for the summation of leading and up to three subsequent subleading orders of logarithms. The summations accessible from the four-loop vector correlator not only lead to a substantial reduction in sensitivity to the renormalization scale, but necessarily impose a common infrared bound on perturbative approximations to R(s), regardless of the infrared behavior of the true QCD couplant.
dc.publisherAmerican Physical Society (APS)
dc.relation.ispartofPhysical Review D
dc.subjectquantum-chromodynamic corrections
dc.subjecte+e annihilation
dc.subjectbeta-function
dc.subjectqcd
dc.subjectsummation
dc.subjecttau
dc.subjectalpha(s)(m-tau(2))
dc.subjectdecays
dc.subjectvector
dc.titleOptimal renormalization-group improvement of the perturbative series for thee+e−annihilation cross section
dc.typeArticle
dc.identifier.doi10.1103/physrevd.67.034017
dc.local.publishedsourcehttp://arxiv.org/pdf/hep-ph/0208025
nui.item.downloads0


Files in this item

This item appears in the following Collection(s)

Show simple item record