dc.contributor.author | Ahmady, M. R. | |
dc.contributor.author | Chishtie, F. A. | |
dc.contributor.author | Elias, V. | |
dc.contributor.author | Fariborz, A. H. | |
dc.contributor.author | McKeon, D. G. C. | |
dc.contributor.author | Sherry, T. N. | |
dc.contributor.author | Squires, A. | |
dc.contributor.author | Steele, T. G. | |
dc.date.accessioned | 2018-08-24T08:23:59Z | |
dc.date.available | 2018-08-24T08:23:59Z | |
dc.date.issued | 2003-02-26 | |
dc.identifier.citation | Ahmady, 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.issn | 0556-2821,1089-4918 | |
dc.identifier.uri | http://hdl.handle.net/10379/8820 | |
dc.description.abstract | Using 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.publisher | American Physical Society (APS) | |
dc.relation.ispartof | Physical Review D | |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Ireland | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ | |
dc.subject | quantum-chromodynamic corrections | |
dc.subject | e+e annihilation | |
dc.subject | beta-function | |
dc.subject | qcd | |
dc.subject | summation | |
dc.subject | tau | |
dc.subject | alpha(s)(m-tau(2)) | |
dc.subject | decays | |
dc.subject | vector | |
dc.title | Optimal renormalization-group improvement of the perturbative series for thee+e−annihilation cross section | |
dc.type | Article | |
dc.identifier.doi | 10.1103/physrevd.67.034017 | |
dc.local.publishedsource | http://arxiv.org/pdf/hep-ph/0208025 | |
nui.item.downloads | 0 | |