Determination of the strong coupling constant α s ( m Z ) in next-to-next-to-leading order QCD using H1 jet cross section measurements: H1 Collaboration
Status PubMed-not-MEDLINE Jazyk angličtina Země Francie Médium print-electronic
Typ dokumentu časopisecké články
PubMed
31997933
PubMed Central
PMC6956906
DOI
10.1140/epjc/s10052-017-5314-7
PII: 5314
Knihovny.cz E-zdroje
- Publikační typ
- časopisecké články MeSH
The strong coupling constant α s 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 α s ( m Z ) at the Z-boson mass m Z 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 α s ( m Z ) = 0.1157 ( 20 ) exp ( 29 ) th . Complementary, α s ( m Z ) is determined together with parton distribution functions of the proton (PDFs) from jet and inclusive DIS data measured by the H1 experiment. The value α s ( m Z ) = 0.1142 ( 28 ) tot 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.
1 Physikalisches Institut der RWTH Aachen Germany
2 Physikalisches Institut Universität Göttingen Göttingen Germany
Aix Marseille Université CNRS IN2P3 CPPM UMR 7346 13288 Marseille France
Departamento de Fisica Aplicada CINVESTAV Mérida Yucatán Mexico
Department of Physics and Astronomy University of Sussex Pevensey 2 Brighton UK
Department of Physics and Astronomy Vrije University De Boelelaan 1081 Amsterdam The Netherlands
Department of Physics Oxford University Oxford UK
Department of Physics University of Lancaster Lancaster UK
Department of Physics University of Liverpool Liverpool UK
Department of Physics University of Toronto Toronto ON M5S 1A7 Canada
Dipartimento di Fisica Università di Roma Tre and INFN Roma 3 Rome Italy
Fachbereich C Universität Wuppertal Wuppertal Germany
Faculty of Mathematics and Physics Charles University Prague Czech Republic
Faculty of Science University of Montenegro Podgorica Montenegro
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering Bucharest Romania
Institut für Experimentalphysik Universität Hamburg Hamburg Germany
Institut für Physik TU Dortmund Dortmund Germany
Institut für Teilchenphysik ETH Zürich Zurich Switzerland
Institute for Information Transmission Problems RAS Moscow Russia
Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria
Institute for Theoretical and Experimental Physics Moscow Russia
Institute of Nuclear Physics Polish Academy of Sciences 31342 Kraków Poland
Institute of Physics Academy of Sciences of the Czech Republic Prague Czech Republic
Institute of Physics and Technology of the Mongolian Academy of Sciences Ulaanbaatar Mongolia
IPNL Université Claude Bernard Lyon 1 CNRS IN2P3 Villeurbanne France
Irfu SPP CE Saclay Gif sur Yvette France
Joint Institute for Nuclear Research Dubna Russia
Karlsruher Institut für Technologie Wolfgang Gaede Str 1 Karlsruhe Germany
LAL Université Paris Sud CNRS IN2P3 Orsay France
LAPP Université de Savoie CNRS IN2P3 Annecy le Vieux France
Lebedev Physical Institute Moscow Russia
LLR Ecole Polytechnique CNRS IN2P3 Palaiseau France
Max Planck Institut für Physik Munich Germany
Moscow Institute of Physics and Technology Dolgoprudny Moscow Region Russian Federation
National Institute for Subatomic Physics Science Park 105 Amsterdam The Netherlands
Paul Scherrer Institute Villigen Switzerland
Physik Institut der Universität Zürich Zurich Switzerland
Physikalisches Institut Universität Heidelberg Heidelberg Germany
School of Physics and Astronomy Queen Mary University of London London UK
School of Physics and Astronomy University of Birmingham Birmingham UK
Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University Moscow Russia
STFC Rutherford Appleton Laboratory Didcot Oxfordshire UK
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