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://ucrisportal.univie.ac.at/de/publications/precision-thrust-cumulant-moments-at-n3ll(84fa928e-27d5-4724-84bd-c3ad4ab76533).html