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Power corrections in the dispersive model for a determination of the strong coupling constant from the thrust distribution - Zurich Open Repository and Archive


Gehrmann, Thomas; Luisoni, Gionata; Monni, Pier Francesco (2013). Power corrections in the dispersive model for a determination of the strong coupling constant from the thrust distribution. European Physical Journal C - Particles and Fields, 73(1):online.

Abstract

In the context of the dispersive model for non-perturbative corrections, we extend the leading renormalon subtraction to NNLO for the thrust distribution in e + e - annihilation. Within this framework, using a NNLL+NNLO perturbative description and including bottom-quark mass effects to NLO, we analyse data in the centre-of-mass energy range sqrt{s}=14{-}206 {GeV} in view of a simultaneous determination of the strong coupling constant and the non-perturbative parameter α 0. The fits are performed by matching the resummed and fixed-order predictions both in the R and the log-R matching schemes. The final values in the R scheme are αs(MZ) = 0.1131^{+0.0028}_{-0.0022}, α0(2 GeV) = 0.538^{+0.102}_{-0.047}.

Abstract

In the context of the dispersive model for non-perturbative corrections, we extend the leading renormalon subtraction to NNLO for the thrust distribution in e + e - annihilation. Within this framework, using a NNLL+NNLO perturbative description and including bottom-quark mass effects to NLO, we analyse data in the centre-of-mass energy range sqrt{s}=14{-}206 {GeV} in view of a simultaneous determination of the strong coupling constant and the non-perturbative parameter α 0. The fits are performed by matching the resummed and fixed-order predictions both in the R and the log-R matching schemes. The final values in the R scheme are αs(MZ) = 0.1131^{+0.0028}_{-0.0022}, α0(2 GeV) = 0.538^{+0.102}_{-0.047}.

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25 citations in Web of Science®
13 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:January 2013
Deposited On:12 Sep 2013 11:42
Last Modified:05 Apr 2016 16:58
Publisher:Springer
ISSN:1434-6044
Additional Information:The final publication is available at link.springer.com
Publisher DOI:https://doi.org/10.1140/epjc/s10052-012-2265-x

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