Uncertainties on the theoretical input for $t\bar{t}j$ experimental analyses at the LHC
| Autor: | Voß, Katharina, Garzelli, Maria Vittoria, Moch, Sven-Olaf |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
p p: scattering
scale: renormalization top: mass top: production FOS: Physical sciences parton: distribution function renormalization [scale] pair production [top] High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) CERN LHC Coll track data analysis: jet scale: factorization mass [top] production [top] scattering [p p] jet [track data analysis] factorization [scale] top: pair production distribution function [parton] |
| Zdroj: | 14th International Workshop on Top Quark Physics (videoconference), 13-17 September, 2021, TOP2021, East Lansing, USA, 2021-09-13-2021-09-17 |
| Popis: | The precise measurement of the top-quark mass constitutes one of the main goals of the LHC top-quark physics program. One possibility to extract this parameter uses the $\rho_{\mathrm{s}}$ distribution, which depends on the invariant mass of the $t\bar{t}j$ system. To fully take advantage of the experimental accuracy achievable in measuring top quark production cross sections at the LHC, the theory uncertainties need to be well under control. We present a study of the effect of varying the input parameters of the theoretical calculation on the predicted $\rho_{\mathrm{s}}$ distribution. Thereby we studied the influence of the $R$ parameter in the jet reconstruction procedure, as well as the effect of various renormalization and factorization scale definitions and different PDF sets. A behaviour similar to the one presented here for the $\rho_{\mathrm{s}}$-distribution was also found for other differential distributions. 4 pages, LaTeX, 2 figures, Contribution to the 14th International Workshop on Top Quark Physics (videoconference), 13-17 September 2021 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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