A precise interpretation for the top quark mass parameter in ATLAS Monte Carlo simulation
| Autor: | ATLAS Collaboration |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
perturbation theory [quantum chromodynamics]
p p: scattering data analysis method mass spectrum [jet] TOP MASS transverse momentum: high 13000 GeV-cms top: mass jet: transverse momentum transverse momentum [jet] high [transverse momentum] jet: mass spectrum transverse momentum [top] scattering [p p] quantum chromodynamics: perturbation theory top: transverse momentum underlying event JSS top: hadronic decay perturbation theory: higher-order TOP Monte Carlo [numerical calculations] ATLAS calibration QCD hadronic decay [top] higher-order [perturbation theory] CERN LHC Coll SOFT DROP JET SUBSTRUCTURE mass [top] PYTHIA XCONE High Energy Physics::Experiment colliding beams [p p] numerical calculations: Monte Carlo p p: colliding beams |
| DOI: | 10.3204/pubdb-2021-05537 |
| Popis: | 33 pp. (2021). This note relates the top quark mass parameter in simulated pp collisions with a 13 TeV centre-of-mass-energy produced by ATLAS to a well-defined field-theoretical mass scheme. A calibration for the top mass parameter in simulation is obtained by fitting the simulated jet mass distribution of large--radius jets containing hadronically-decaying top quark with large transverse momentum, with a particle-level calculation at next-to-leading-log precision. The relation between the top mass parameter in the nominal \POWHEG + \PYTHIA simulation and the MSR mass scheme is determined to be: \Delta^{MSR} = m_{t}^{\text{MC}} - m_{t}^{\text{MSR}} (1 \GeV) = 80^{+350}_{-400} \MeV, where the uncertainty is dominated by contributions from uncalculated higher orders in the NLL calculation, the fit methodology and underlying event modelling. |
| Databáze: | OpenAIRE |
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