Improving the understanding of jet grooming in perturbation theory
Abstract Jet grooming has emerged as a necessary and powerful tool in a precision jet physics program. In this paper, we present three results on jet grooming in perturbation theory, focusing on heavy jet mass in e + e − → hadrons collisions, groomed with the modified mass drop tagger. First, we cal...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-09-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | http://link.springer.com/article/10.1007/JHEP09(2020)072 |
| _version_ | 1818938756389928960 |
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| author | Andrew J. Larkoski |
| author_facet | Andrew J. Larkoski |
| author_sort | Andrew J. Larkoski |
| collection | DOAJ |
| description | Abstract Jet grooming has emerged as a necessary and powerful tool in a precision jet physics program. In this paper, we present three results on jet grooming in perturbation theory, focusing on heavy jet mass in e + e − → hadrons collisions, groomed with the modified mass drop tagger. First, we calculate the analytic cross section at leading-order. Second, using the leading-order result and numerical results through next-to-next-to-leading order, we show that cusps in the distribution on the interior of phase space at leading-order are softened at higher orders. Finally, using analytic and numerical results, we show that terms that violate the assumptions of the factorization theorem for groomed jet mass are numerically much smaller than expected from power counting. These results provide important information regarding the convergence of perturbation theory for groomed jet observables and reliable estimates for residual uncertainties in a precision calculation. |
| first_indexed | 2024-12-20T06:12:55Z |
| format | Article |
| id | doaj.art-4550d1ad120c4e63b6faa1d71a6dd865 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-20T06:12:55Z |
| publishDate | 2020-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-4550d1ad120c4e63b6faa1d71a6dd8652022-12-21T19:50:38ZengSpringerOpenJournal of High Energy Physics1029-84792020-09-012020911610.1007/JHEP09(2020)072Improving the understanding of jet grooming in perturbation theoryAndrew J. Larkoski0Physics Department, Reed CollegeAbstract Jet grooming has emerged as a necessary and powerful tool in a precision jet physics program. In this paper, we present three results on jet grooming in perturbation theory, focusing on heavy jet mass in e + e − → hadrons collisions, groomed with the modified mass drop tagger. First, we calculate the analytic cross section at leading-order. Second, using the leading-order result and numerical results through next-to-next-to-leading order, we show that cusps in the distribution on the interior of phase space at leading-order are softened at higher orders. Finally, using analytic and numerical results, we show that terms that violate the assumptions of the factorization theorem for groomed jet mass are numerically much smaller than expected from power counting. These results provide important information regarding the convergence of perturbation theory for groomed jet observables and reliable estimates for residual uncertainties in a precision calculation.http://link.springer.com/article/10.1007/JHEP09(2020)072JetsNLO Computations |
| spellingShingle | Andrew J. Larkoski Improving the understanding of jet grooming in perturbation theory Journal of High Energy Physics Jets NLO Computations |
| title | Improving the understanding of jet grooming in perturbation theory |
| title_full | Improving the understanding of jet grooming in perturbation theory |
| title_fullStr | Improving the understanding of jet grooming in perturbation theory |
| title_full_unstemmed | Improving the understanding of jet grooming in perturbation theory |
| title_short | Improving the understanding of jet grooming in perturbation theory |
| title_sort | improving the understanding of jet grooming in perturbation theory |
| topic | Jets NLO Computations |
| url | http://link.springer.com/article/10.1007/JHEP09(2020)072 |
| work_keys_str_mv | AT andrewjlarkoski improvingtheunderstandingofjetgroominginperturbationtheory |