Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-34344

Gehrmann, T; Jaquier, M; Luisoni, G (2010). Hadronization effects in event-shape moments. European Physical Journal C - Particles and Fields, 67(1-2):57-72.

[img]
Preview
Accepted Version
PDF (Accepted manuscript, Version 3)
228kB

View at publisher
[img]
Preview
Accepted Version
PDF (Accepted manuscript, Version 2)
228kB
[img]
Preview
Accepted Version
PDF (Accepted manuscript, Version 1)
192kB

Abstract

We study the moments of hadronic event shapes in e + e ‑ annihilation within the context of next-to-next-to-leading order (NNLO) perturbative QCD predictions combined with non-perturbative power corrections in the dispersive model. This model is extended to match the NNLO perturbative prediction. The resulting theoretical expression has been compared to experimental data from JADE and OPAL, and a new value for α s ( M Z ) has been determined, as well as of the average coupling α 0 in the non-perturbative region below μ I =2 GeV within the dispersive model: begin{array}{rcl}α_s(M_Z)&=&0.1153±0.0017(exp)±0.0023(th),\[5pt]α_0&=&0.5132±0.0115(exp)±0.0381(th). The precision of the α s ( M Z ) value has been improved in comparison to the previously available next-to-leading order analysis. We observe that the resulting power corrections are considerably larger than those estimated from hadronisation models in multi-purpose event generator programs.

Citations

31 citations in Web of Science®
37 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

54 downloads since deposited on 02 Mar 2011
17 downloads since 12 months

Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
DDC:530 Physics
Language:English
Date:May 2010
Deposited On:02 Mar 2011 17:17
Last Modified:08 Jul 2014 10:06
Publisher:Springer
ISSN:1434-6044
Publisher DOI:10.1140/epjc/s10052-010-1288-4
Related URLs:http://arxiv.org/abs/0911.2422

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page