Precision thrust cumulant moments at N³LL

Author(s)

Ricardo Abbate, Michael Fickinger, André H. Hoang, Vincent Mateu, Iain W. Stewart

Abstract

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(s)

Particle Physics

External organisation(s)

Massachusetts Institute of Technology, University of Arizona

Journal

Physical Review D

Volume

86

No. of pages

22

ISSN

1550-7998

Publication date

2012

Peer reviewed

Yes

Austrian Fields of Science 2012

103034 Particle physics

Portal url

https://ucris.univie.ac.at/portal/en/publications/precision-thrust-cumulant-moments-at-n3ll(84fa928e-27d5-4724-84bd-c3ad4ab76533).html