Uncertainties on the determination of the strong coupling αs from the energy evolution of jet fragmentation functions at low z
| Autor: | David D'Enterria, Redamy Pérez-Ramos |
|---|---|
| Přispěvatelé: | Aguilar-Benítez, M., Fuster, J., Martí-García, S., Santamaría, A. |
| Rok vydání: | 2016 |
| Předmět: |
jets
Nuclear and High Energy Physics Particle physics Electron–positron annihilation Hadron FOS: Physical sciences pQCD 01 natural sciences High Energy Physics - Experiment Nuclear physics High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology (hep-ph) Fragmentation (mass spectrometry) strong coupling 0103 physical sciences Multiplicity (chemistry) 010306 general physics Nuclear Experiment Particle Physics - Phenomenology Physics Quantum chromodynamics ta114 deep-inelastic scattering 010308 nuclear & particles physics parton fragmentation functions High Energy Physics::Phenomenology e+e− annihilation Deep inelastic scattering High Energy Physics - Phenomenology Skewness Strong coupling High Energy Physics::Experiment |
| Zdroj: | Nuclear and Particle Physics Proceedings. :1943-1948 |
| ISSN: | 2405-6014 |
| DOI: | 10.1016/j.nuclphysbps.2015.09.314 |
| Popis: | The QCD coupling alpha_s is determined at NLO*+NMLLA accuracy from the comparison of experimental jet data to theoretical predictions of the energy-evolution of the parton-to-hadron fragmentation function moments (multiplicity, peak, width, skewness) at low fractional hadron momentum z. From the existing e+e- and e-p jet data, we obtain alpha_s(m_Z^2) = 0.1195 +/- 0.0021 (exp.) {+0.0015}_{-0.0} (scale) at the Z mass. The uncertainties of the extracted alpha_s value are discussed. 6 pages. 7 figures. Proceedings ICHEP'14, Val\`encia. Nucl. Phys. B Proceeds. Suppl., to appear |
| Databáze: | OpenAIRE |
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