Calibration of the top quark mass for Monte-Carlo event generators
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Sissa Medialab
2021
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| Online Access: | https://hdl.handle.net/1721.1/137215 |
| _version_ | 1811097255896154112 |
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| author | Preisser, Moritz Butenschön, Mathias Dehnadi, Bahman Hoang, Andre Mateu, Vicent Stewart, Iain W. |
| author_facet | Preisser, Moritz Butenschön, Mathias Dehnadi, Bahman Hoang, Andre Mateu, Vicent Stewart, Iain W. |
| author_sort | Preisser, Moritz |
| collection | MIT |
| description | © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event generator, mtMC. Due to the complicated interplay of hadronization and parton shower dynamics in Monte Carlo event generators, relating mtMC to field theory masses is a non-trivial task. In this talk we present a calibration procedure to determine this relation using hadron level QCD predictions for 2-Jettiness in e+e- annihilation, an observable which has kinematic top mass sensitivity and has a close relation to the invariant mass of the particles coming from the top decay. The theoretical ingredients of the QCD prediction are explained. Fitting e+e- 2-Jettiness calculations at NLL/NNLL order to PYTHIA 8.205, we find that mtMC agrees with the MSR mass at the scale 1 GeV within uncertainties, mtMC ≃ mtMSR1GeV, but differs from the pole mass by 900/600 MeV. |
| first_indexed | 2024-09-23T16:56:48Z |
| format | Article |
| id | mit-1721.1/137215 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:56:48Z |
| publishDate | 2021 |
| publisher | Sissa Medialab |
| record_format | dspace |
| spelling | mit-1721.1/1372152021-11-04T03:01:14Z Calibration of the top quark mass for Monte-Carlo event generators Preisser, Moritz Butenschön, Mathias Dehnadi, Bahman Hoang, Andre Mateu, Vicent Stewart, Iain W. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event generator, mtMC. Due to the complicated interplay of hadronization and parton shower dynamics in Monte Carlo event generators, relating mtMC to field theory masses is a non-trivial task. In this talk we present a calibration procedure to determine this relation using hadron level QCD predictions for 2-Jettiness in e+e- annihilation, an observable which has kinematic top mass sensitivity and has a close relation to the invariant mass of the particles coming from the top decay. The theoretical ingredients of the QCD prediction are explained. Fitting e+e- 2-Jettiness calculations at NLL/NNLL order to PYTHIA 8.205, we find that mtMC agrees with the MSR mass at the scale 1 GeV within uncertainties, mtMC ≃ mtMSR1GeV, but differs from the pole mass by 900/600 MeV. 2021-11-03T14:56:44Z 2021-11-03T14:56:44Z 2017-02-06 2019-04-29T19:50:05Z Article http://purl.org/eprint/type/ConferencePaper https://hdl.handle.net/1721.1/137215 Preisser, Moritz, Butenschön, Mathias, Dehnadi, Bahman, Hoang, Andre, Mateu, Vicent et al. 2017. "Calibration of the top quark mass for Monte-Carlo event generators." en 10.22323/1.282.0698 Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Sissa Medialab Proceedings of Science |
| spellingShingle | Preisser, Moritz Butenschön, Mathias Dehnadi, Bahman Hoang, Andre Mateu, Vicent Stewart, Iain W. Calibration of the top quark mass for Monte-Carlo event generators |
| title | Calibration of the top quark mass for Monte-Carlo event generators |
| title_full | Calibration of the top quark mass for Monte-Carlo event generators |
| title_fullStr | Calibration of the top quark mass for Monte-Carlo event generators |
| title_full_unstemmed | Calibration of the top quark mass for Monte-Carlo event generators |
| title_short | Calibration of the top quark mass for Monte-Carlo event generators |
| title_sort | calibration of the top quark mass for monte carlo event generators |
| url | https://hdl.handle.net/1721.1/137215 |
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