High precision determination of αs from a global fit of jet rates

Andrii Verbytskyi; Andrea Banfi; Adam Kardos; Pier Francesco Monni; Stefan Kluth; Gábor Somogyi; Zoltán Szőr; Zoltán Trócsányi; Zoltán Tulipánt; Giulia Zanderighi

doi:10.1007/JHEP08(2019)129

High precision determination of α_s from a global fit of jet rates

Andrii Verbytskyi, Andrea Banfi, Adam Kardos, Pier Francesco Monni, Stefan Kluth, Gábor Somogyi, Zoltán Szőr, Zoltán Trócsányi, Zoltán Tulipánt, Giulia Zanderighi

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

We present state-of-the-art extractions of the strong coupling based on N³LO+NNLL accurate predictions for the two-jet rate in the Durham clustering algorithm at e⁺e⁻ collisions, as well as a simultaneous fit of the two- and three-jet rates taking into account correlations between the two observables. The fits are performed on a large range of data sets collected at the LEP and PETRA colliders, with energies spanning from 35 GeV to 207 GeV. Owing to the high accuracy of the predictions used, the perturbative uncertainty is considerably smaller than that due to hadronization. Our best determination at the Z mass is α_s (M_Z) = 0.11881 ± 0.00063(exp.) ± 0.00101(hadr.) ± 0.00045(ren.) ± 0.00034(res.), which is in agreement with the latest world average and has a comparable total uncertainty.

Original language	English
Article number	129
Journal	Journal of High Energy Physics
Volume	2019
Issue number	8
DOIs	https://doi.org/10.1007/JHEP08(2019)129
State	Published - 1 Aug 2019
Externally published	Yes

Keywords

Jets
QCD Phenomenology

Access to Document

10.1007/JHEP08(2019)129

Cite this

@article{6053b2576c484d41b138471bad3784f1,

title = "High precision determination of αs from a global fit of jet rates",

abstract = "We present state-of-the-art extractions of the strong coupling based on N3LO+NNLL accurate predictions for the two-jet rate in the Durham clustering algorithm at e+e− collisions, as well as a simultaneous fit of the two- and three-jet rates taking into account correlations between the two observables. The fits are performed on a large range of data sets collected at the LEP and PETRA colliders, with energies spanning from 35 GeV to 207 GeV. Owing to the high accuracy of the predictions used, the perturbative uncertainty is considerably smaller than that due to hadronization. Our best determination at the Z mass is αs (MZ) = 0.11881 ± 0.00063(exp.) ± 0.00101(hadr.) ± 0.00045(ren.) ± 0.00034(res.), which is in agreement with the latest world average and has a comparable total uncertainty.",

keywords = "Jets, QCD Phenomenology",

author = "Andrii Verbytskyi and Andrea Banfi and Adam Kardos and Monni, {Pier Francesco} and Stefan Kluth and G{\'a}bor Somogyi and Zolt{\'a}n Sz{\H o}r and Zolt{\'a}n Tr{\'o}cs{\'a}nyi and Zolt{\'a}n Tulip{\'a}nt and Giulia Zanderighi",

note = "Publisher Copyright: {\textcopyright} 2019, The Author(s).",

year = "2019",

month = aug,

day = "1",

doi = "10.1007/JHEP08(2019)129",

language = "English",

volume = "2019",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Verlag",

number = "8",

}

TY - JOUR

T1 - High precision determination of αs from a global fit of jet rates

AU - Verbytskyi, Andrii

AU - Banfi, Andrea

AU - Kardos, Adam

AU - Monni, Pier Francesco

AU - Kluth, Stefan

AU - Somogyi, Gábor

AU - Szőr, Zoltán

AU - Trócsányi, Zoltán

AU - Tulipánt, Zoltán

AU - Zanderighi, Giulia

PY - 2019/8/1

Y1 - 2019/8/1

N2 - We present state-of-the-art extractions of the strong coupling based on N3LO+NNLL accurate predictions for the two-jet rate in the Durham clustering algorithm at e+e− collisions, as well as a simultaneous fit of the two- and three-jet rates taking into account correlations between the two observables. The fits are performed on a large range of data sets collected at the LEP and PETRA colliders, with energies spanning from 35 GeV to 207 GeV. Owing to the high accuracy of the predictions used, the perturbative uncertainty is considerably smaller than that due to hadronization. Our best determination at the Z mass is αs (MZ) = 0.11881 ± 0.00063(exp.) ± 0.00101(hadr.) ± 0.00045(ren.) ± 0.00034(res.), which is in agreement with the latest world average and has a comparable total uncertainty.

AB - We present state-of-the-art extractions of the strong coupling based on N3LO+NNLL accurate predictions for the two-jet rate in the Durham clustering algorithm at e+e− collisions, as well as a simultaneous fit of the two- and three-jet rates taking into account correlations between the two observables. The fits are performed on a large range of data sets collected at the LEP and PETRA colliders, with energies spanning from 35 GeV to 207 GeV. Owing to the high accuracy of the predictions used, the perturbative uncertainty is considerably smaller than that due to hadronization. Our best determination at the Z mass is αs (MZ) = 0.11881 ± 0.00063(exp.) ± 0.00101(hadr.) ± 0.00045(ren.) ± 0.00034(res.), which is in agreement with the latest world average and has a comparable total uncertainty.

KW - Jets

KW - QCD Phenomenology

UR - http://www.scopus.com/inward/record.url?scp=85071666907&partnerID=8YFLogxK

U2 - 10.1007/JHEP08(2019)129

DO - 10.1007/JHEP08(2019)129

M3 - Article

AN - SCOPUS:85071666907

SN - 1126-6708

VL - 2019

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 8

M1 - 129

ER -

High precision determination of α_s from a global fit of jet rates

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this