Publicação
Energy scale and resolution for anti-kt jets with radius parameters R=0.2 and 0.6 measured in proton-proton collisions at s=13 TeV with the ATLAS detector
| Resumo: | Jets with different radius parameters \( R \) are an important tool for probing quantum chromodynamics pro cesses at different angular scales. Jets with small \( R = 0.2 \) are instrumental in measurements of the substructure of large\( R \) jets resulting from collimated hadronic decays of ener getic \( W \), \( Z \), and Higgs bosons, top quarks, and of potential new resonances. This paper presents measurements of the energy scale, resolution, and associated uncertainties of jets with radius parameters \( R = 0.2 \) and \( 0.6 \), obtained using the ATLAS detector. The results are based on 37 fb\(^{-1}\) of proton–proton collision data from the Large Hadron Collider at a centre-of-mass energy of \( \sqrt{s} = 13 \) TeV. A new in situ method for measuring jet energy scale differences between data and Monte Carlo simulations is presented. The systematic uncertainties in the jet energy scale for central jets (\(|\eta| < 1.2\)) typically vary from 1% to about 5% as a function of \( |\eta| \) at very low transverse momentum, \( p_T \), of around 20 GeV for both \( R = 0.2 \) and \( 0.6 \) jets. The relative energy resolution ranges from \((35 \pm 6)\% \) at \( p_T = 20 \) GeV to \((6 \pm 0.5)\% \) at \( p_T = 300 \) GeV for central \( R = 0.2 \) jets, and is found to be slightly worse for \( R = 0.6 \) jets. Finally, the effect of close-by hadronic activity on the jet energy scale is investigated and is found to be well modelled by the ATLAS Monte Carlo simulations. |
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| Autores principais: | Castro, Nuno Filipe |
| Outros Autores: | Onofre, A.; ATLAS Collaboration |
| Assunto: | Ciências Naturais::Ciências Físicas |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | Jets with different radius parameters \( R \) are an important tool for probing quantum chromodynamics pro cesses at different angular scales. Jets with small \( R = 0.2 \) are instrumental in measurements of the substructure of large\( R \) jets resulting from collimated hadronic decays of ener getic \( W \), \( Z \), and Higgs bosons, top quarks, and of potential new resonances. This paper presents measurements of the energy scale, resolution, and associated uncertainties of jets with radius parameters \( R = 0.2 \) and \( 0.6 \), obtained using the ATLAS detector. The results are based on 37 fb\(^{-1}\) of proton–proton collision data from the Large Hadron Collider at a centre-of-mass energy of \( \sqrt{s} = 13 \) TeV. A new in situ method for measuring jet energy scale differences between data and Monte Carlo simulations is presented. The systematic uncertainties in the jet energy scale for central jets (\(|\eta| < 1.2\)) typically vary from 1% to about 5% as a function of \( |\eta| \) at very low transverse momentum, \( p_T \), of around 20 GeV for both \( R = 0.2 \) and \( 0.6 \) jets. The relative energy resolution ranges from \((35 \pm 6)\% \) at \( p_T = 20 \) GeV to \((6 \pm 0.5)\% \) at \( p_T = 300 \) GeV for central \( R = 0.2 \) jets, and is found to be slightly worse for \( R = 0.6 \) jets. Finally, the effect of close-by hadronic activity on the jet energy scale is investigated and is found to be well modelled by the ATLAS Monte Carlo simulations. |
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