Determination of the strong coupling constant αs(mZ)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\varvec{{\alpha _\mathrm{s} (m_\mathrm{Z})}}}$$\end{document} in next-to-next-to-leading order QCD using H1 jet cross section measurementsH1 Collaboration

被引：0
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作者：
V. Andreev
A. Baghdasaryan
K. Begzsuren
A. Belousov
V. Bertone
A. Bolz
V. Boudry
G. Brandt
V. Brisson
D. Britzger
A. Buniatyan
A. Bylinkin
L. Bystritskaya
A. J. Campbell
K. B. Cantun Avila
K. Cerny
V. Chekelian
J. G. Contreras
J. Cvach
J. Currie
J. B. Dainton
K. Daum
C. Diaconu
M. Dobre
V. Dodonov
G. Eckerlin
S. Egli
E. Elsen
L. Favart
A. Fedotov
J. Feltesse
M. Fleischer
A. Fomenko
E. Gabathuler
J. Gayler
T. Gehrmann
S. Ghazaryan
L. Goerlich
N. Gogitidze
M. Gouzevitch
C. Grab
A. Grebenyuk
T. Greenshaw
G. Grindhammer
C. Gwenlan
D. Haidt
R. C. W. Henderson
J. Hladkỳ
D. Hoffmann
R. Horisberger
机构：
[1] I. Physikalisches Institut der RWTH,School of Physics and Astronomy
[2] University of Birmingham,Inter
[3] Brussels and Universiteit Antwerpen,University Institute for High Energies ULB
[4] Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH),VUB
[5] STFC,Institute of Nuclear Physics
[6] Rutherford Appleton Laboratory,Institut für Physik
[7] Polish Academy of Sciences,Institut für Experimentalphysik
[8] TU Dortmund,Physikalisches Institut
[9] Joint Institute for Nuclear Research,Department of Physics
[10] Irfu/SPP,Department of Physics
[11] CE Saclay,School of Physics and Astronomy
[12] DESY,Departamento de Fisica Aplicada
[13] Universität Hamburg,Faculty of Science
[14] Universität Heidelberg,Institute of Physics
[15] University of Lancaster,Faculty of Mathematics and Physics
[16] University of Liverpool,Dipartimento di Fisica
[17] Queen Mary University of London,Institut für Teilchenphysik
[18] Aix Marseille Université, Skobeltsyn Institute of Nuclear Physics
[19] CNRS/IN2P3, Department of Physics
[20] CPPM UMR 7346, LAPP
[21] CINVESTAV, II. Physikalisches Institut
[22] Institute for Theoretical and Experimental Physics, Department of Physics
[23] Lebedev Physical Institute, Department of Physics and Astronomy
[24] Max-Planck-Institut für Physik,Department of Physics and Astronomy
[25] LAL,Institute for Particle Physics Phenomenology, Ogden Centre for Fundamental Physics
[26] Université Paris-Sud,Department of Physics and Astronomy
[27] CNRS/IN2P3,undefined
[28] LLR,undefined
[29] Ecole Polytechnique,undefined
[30] CNRS/IN2P3,undefined
[31] University of Montenegro,undefined
[32] Academy of Sciences of the Czech Republic,undefined
[33] Charles University,undefined
[34] Università di Roma Tre and INFN Roma 3,undefined
[35] Institute for Nuclear Research and Nuclear Energy,undefined
[36] Institute of Physics and Technology of the Mongolian Academy of Sciences,undefined
[37] Paul Scherrer Institute,undefined
[38] Fachbereich C,undefined
[39] Universität Wuppertal,undefined
[40] Yerevan Physics Institute,undefined
[41] DESY,undefined
[42] ETH Zürich,undefined
[43] Physik-Institut der Universität Zürich,undefined
[44] IPNL,undefined
[45] Université Claude Bernard Lyon 1,undefined
[46] CNRS/IN2P3,undefined
[47] Lomonosov Moscow State University,undefined
[48] CERN,undefined
[49] Ulaanbaatar University,undefined
[50] University of Toronto,undefined
来源：
The European Physical Journal C | 2017年 / 77卷 / 11期
关键词：
D O I：
10.1140/epjc/s10052-017-5314-7
中图分类号：
学科分类号：
摘要：
The strong coupling constant αs\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha _\mathrm{s}$$\end{document} is determined from inclusive jet and dijet cross sections in neutral-current deep-inelastic ep scattering (DIS) measured at HERA by the H1 collaboration using next-to-next-to-leading order (NNLO) QCD predictions. The dependence of the NNLO predictions and of the resulting value of αs(mZ)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha _\mathrm{s} (m_\mathrm{Z})$$\end{document} at the Z-boson mass mZ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$m_Z$$\end{document} are studied as a function of the choice of the renormalisation and factorisation scales. Using inclusive jet and dijet data together, the strong coupling constant is determined to be αs(mZ)=0.1157(20)exp(29)th\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha _\mathrm{s} (m_\mathrm{Z}) =0.1157\,(20)_\mathrm{exp}\,(29)_\mathrm{th}$$\end{document}. Complementary, αs(mZ)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha _\mathrm{s} (m_\mathrm{Z})$$\end{document} is determined together with parton distribution functions of the proton (PDFs) from jet and inclusive DIS data measured by the H1 experiment. The value αs(mZ)=0.1142(28)tot\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha _\mathrm{s} (m_\mathrm{Z}) =0.1142\,(28)_\mathrm{tot}$$\end{document} obtained is consistent with the determination from jet data alone. The impact of the jet data on the PDFs is studied. The running of the strong coupling is tested at different values of the renormalisation scale and the results are found to be in agreement with expectations.
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