NNLO corrections to event shapes in e+e− annihilation

By Aude Gehrmann-De Ridder, Thomas Gehrmann, E. Glover, Gudrun Heinrich. 2007

248 citations recorded by the source corpus.

We compute the next-to-next-to-leading order (NNLO) QCD corrections to the six most important event shape variables related to three-particle final states in electron- positron annihilation. The corrections are sizeable for all variables, however their magni- tude is substantially different for different observables. We observe that the NNLO correc- tions yield a considerably better agreement between theory and experimental data both in shape and normalisation of the event shape distributions. The renormalisation scale de- pendence of the theoretical prediction is substantially reduced compared to the previously existing NLO results. Our results will allow a precise determination of the strong coupling constant from event shape data collected at LEP.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9a6c37d7148f9035f5545565cc15e5705d11e4e7

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Citations in the corpus

Jet production in the CoLoRFulNNLO method: event shapes in electron-positron collisions (2016, methodology): “To demonstrate the validity of our code, we compute NNLO corrections to six standard event shape variables (thrust, heavy jet mass, total jet broadening, wide jet broadening, C-parameter and the two-to-three jet transition variable y23 in the Durham algorithm) and compare our predictions to those av”
Introduction to Soft-Collinear Effective Theory (2014, methodology): “e thrust distribution was resummed up to N3LL accuracy in [230], two orders in logarithmic accuracy higher than what had been achieved with traditional methods, and matched to NNLO ﬁxed order results [231, 232]. Based on this result, Ref. [233] performed a precision determination of the strong coupl”
Two-loop soft corrections and resummation of the thrust distribution in the dijet region (2011, methodology): “The differential thrust distribution in perturbation theory is known at NNLO [22,25].”
Jet substructure at the Large Hadron Collider: A review of recent advances in theory and machine learning (2017, methodology): “In e+e− collisions, the required matrix elements have been known for some time [105, 106, 107, 90, 108, 92], and even groomed event shapes have been calculated to NNLO accuracy [94].”
Infrared structure at NNLO using antenna subtraction (2013, methodology): “The antenna subtraction approach has been successfully applied to the infrared structure of three-jet events at NNLO [48–50] and the subsequent numerical calculation of the NNLO corrections to event shape distributions [51–55], the moments of event shapes [54,55] and jet rates [53,56].”
Les Houches 2015: Physics at TeV Colliders Standard Model Working Group Report (2016, background): “EERAD3 is a parton level event generator which computes the QCD corrections to event shape observables and jet rates in electron-positron annihilation to order α3 s [536,537].”