Momentum conservation and unitarity in parton showers and NLL resummation
Abstract We present a systematic study of differences between NLL resummation and parton showers. We first construct a Markovian Monte-Carlo algorithm for resummation of additive observables in electron-positron annihilation. Approximations intrinsic to the pure NLL result are then removed, in order...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-01-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP01(2018)118 |
| _version_ | 1818315746395029504 |
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| author | Stefan Höche Daniel Reichelt Frank Siegert |
| author_facet | Stefan Höche Daniel Reichelt Frank Siegert |
| author_sort | Stefan Höche |
| collection | DOAJ |
| description | Abstract We present a systematic study of differences between NLL resummation and parton showers. We first construct a Markovian Monte-Carlo algorithm for resummation of additive observables in electron-positron annihilation. Approximations intrinsic to the pure NLL result are then removed, in order to obtain a traditional, momentum and probability conserving parton shower based on the coherent branching formalism. The impact of each approximation is studied, and an overall comparison is made between the parton shower and pure NLL resummation. Differences compared to modern parton-shower algorithms formulated in terms of color dipoles are analyzed. |
| first_indexed | 2024-12-13T09:10:26Z |
| format | Article |
| id | doaj.art-a1bb689a69b241218f6aeb8e3bb37dea |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-13T09:10:26Z |
| publishDate | 2018-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-a1bb689a69b241218f6aeb8e3bb37dea2022-12-21T23:52:58ZengSpringerOpenJournal of High Energy Physics1029-84792018-01-012018112010.1007/JHEP01(2018)118Momentum conservation and unitarity in parton showers and NLL resummationStefan Höche0Daniel Reichelt1Frank Siegert2SLAC National Accelerator LaboratoryInstitut für Kern- und Teilchenphysik, Technische Universität DresdenInstitut für Kern- und Teilchenphysik, Technische Universität DresdenAbstract We present a systematic study of differences between NLL resummation and parton showers. We first construct a Markovian Monte-Carlo algorithm for resummation of additive observables in electron-positron annihilation. Approximations intrinsic to the pure NLL result are then removed, in order to obtain a traditional, momentum and probability conserving parton shower based on the coherent branching formalism. The impact of each approximation is studied, and an overall comparison is made between the parton shower and pure NLL resummation. Differences compared to modern parton-shower algorithms formulated in terms of color dipoles are analyzed.http://link.springer.com/article/10.1007/JHEP01(2018)118QCD Phenomenology |
| spellingShingle | Stefan Höche Daniel Reichelt Frank Siegert Momentum conservation and unitarity in parton showers and NLL resummation Journal of High Energy Physics QCD Phenomenology |
| title | Momentum conservation and unitarity in parton showers and NLL resummation |
| title_full | Momentum conservation and unitarity in parton showers and NLL resummation |
| title_fullStr | Momentum conservation and unitarity in parton showers and NLL resummation |
| title_full_unstemmed | Momentum conservation and unitarity in parton showers and NLL resummation |
| title_short | Momentum conservation and unitarity in parton showers and NLL resummation |
| title_sort | momentum conservation and unitarity in parton showers and nll resummation |
| topic | QCD Phenomenology |
| url | http://link.springer.com/article/10.1007/JHEP01(2018)118 |
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