期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 8, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP08(2019)129
关键词
Jets; QCD Phenomenology
资金
- Science Technology and Facilities Council (STFC) [ST/P000819/1]
- Premium Postdoctoral Fellowship program of the Hungarian Academy of Sciences
- National Research, Development and Innovation Fund in Hungary [K 125105]
- European Commission through the Marie Sk lodowska Curie Individual Fellowship [702610]
- ERC Consolidator Grant HICCUP [614577]
- Marie Curie Actions (MSCA) [702610] Funding Source: Marie Curie Actions (MSCA)
- STFC [ST/P000819/1] Funding Source: UKRI
- European Research Council (ERC) [614577] Funding Source: European Research Council (ERC)
We present state-of-the-art extractions of the strong coupling based on (NLO)-L-3+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 alpha(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.
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