6533b86efe1ef96bd12cc0b4
RESEARCH PRODUCT
Uncertainties on the determination of the strong coupling αs from the energy evolution of jet fragmentation functions at low z
David D'enterriaRedamy Pérez-ramossubject
jetsNuclear and High Energy PhysicsParticle physicsElectron–positron annihilationHadronFOS: Physical sciencespQCD01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)Fragmentation (mass spectrometry)strong coupling0103 physical sciencesMultiplicity (chemistry)010306 general physicsNuclear ExperimentParticle Physics - PhenomenologyPhysicsQuantum chromodynamicsta114deep-inelastic scattering010308 nuclear & particles physicsparton fragmentation functionsHigh Energy Physics::Phenomenologye+e− annihilationDeep inelastic scatteringHigh Energy Physics - PhenomenologySkewnessStrong couplingHigh Energy Physics::Experimentdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-10-17 | Nuclear and Particle Physics Proceedings |