Precision thrust cumulant moments at N<sup>3</sup>LL
- Autor(en)
- Ricardo Abbate, Michael Fickinger, André H. Hoang, Vincent Mateu, Iain W. Stewart
- Abstrakt
We consider cumulant moments (cumulants) of the thrust distribution using predictions of the full spectrum for thrust including O(α3s) fixed order results, resummation of singular N3LL
logarithmic contributions, and a class of leading power corrections in a
renormalon-free scheme. From a global fit to the first thrust moment we
extract the strong coupling and the leading power correction matrix
element Ω1. We obtain αs(mZ)=0.1140±(0.0004)exp±(0.0013)hadr±(0.0007)pert, where the 1-σ uncertainties are experimental, from hadronization (related to Ω1) and perturbative, respectively, and Ω1=0.377±(0.044)exp±(0.039)pert GeV. The nth thrust cumulants for n≥2 are completely insensitive to Ω1, and therefore a good instrument for extracting information on higher order power corrections, Ω′n/Qn, from moment data. We find (Ω˜′2)1/2=0.74±(0.11)exp±(0.09)pert GeV.
- Organisation(en)
- Teilchenphysik
- Externe Organisation(en)
- Massachusetts Institute of Technology, University of Arizona
- Journal
- Physical Review D
- Band
- 86
- Anzahl der Seiten
- 22
- ISSN
- 1550-7998
- Publikationsdatum
- 2012
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103034 Teilchenphysik
- Link zum Portal
- https://ucris.univie.ac.at/portal/de/publications/precision-thrust-cumulant-moments-at-n3ll(84fa928e-27d5-4724-84bd-c3ad4ab76533).html