A fragmentation-based study of heavy quark production
Abstract Processes involving heavy quarks are a crucial component of the LHC physics program, both by themselves and as backgrounds for Higgs physics and new physics searches. In this work, we critically reconsider the validity of the widely-adopted approximation in which heavy quarks are generated...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2020)196 |
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| _version_ | 1823863604671152128 |
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| author | Giovanni Ridolfi Maria Ubiali Marco Zaro |
| author_facet | Giovanni Ridolfi Maria Ubiali Marco Zaro |
| author_sort | Giovanni Ridolfi |
| collection | DOAJ |
| description | Abstract Processes involving heavy quarks are a crucial component of the LHC physics program, both by themselves and as backgrounds for Higgs physics and new physics searches. In this work, we critically reconsider the validity of the widely-adopted approximation in which heavy quarks are generated at the matrix-element level, with special emphasis on the impact of the collinear logarithms associated with final-state heavy quark and gluon splittings. Our study, based on a perturbative fragmentation-function approach, explicitly shows that neglecting the resummation of collinear logarithms may yield inaccurate predictions, in particular when observables exclusive in the heavy quark degrees of freedom are considered. Our findings motivate the use of schemes which encompass the resummation of final-state collinear logarithms. |
| format | Article |
| id | doaj-art-6cbb073783914e949723dc57506e50a8 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-6cbb073783914e949723dc57506e50a82025-02-09T12:06:05ZengSpringerOpenJournal of High Energy Physics1029-84792020-01-012020113410.1007/JHEP01(2020)196A fragmentation-based study of heavy quark productionGiovanni Ridolfi0Maria Ubiali1Marco Zaro2Dipartimento di Fisica, Università di Genova & INFN, Sezione di GenovaDAMTP, University of CambridgeINFN, Sezione di MilanoAbstract Processes involving heavy quarks are a crucial component of the LHC physics program, both by themselves and as backgrounds for Higgs physics and new physics searches. In this work, we critically reconsider the validity of the widely-adopted approximation in which heavy quarks are generated at the matrix-element level, with special emphasis on the impact of the collinear logarithms associated with final-state heavy quark and gluon splittings. Our study, based on a perturbative fragmentation-function approach, explicitly shows that neglecting the resummation of collinear logarithms may yield inaccurate predictions, in particular when observables exclusive in the heavy quark degrees of freedom are considered. Our findings motivate the use of schemes which encompass the resummation of final-state collinear logarithms.https://doi.org/10.1007/JHEP01(2020)196QCD Phenomenology |
| spellingShingle | Giovanni Ridolfi Maria Ubiali Marco Zaro A fragmentation-based study of heavy quark production Journal of High Energy Physics QCD Phenomenology |
| title | A fragmentation-based study of heavy quark production |
| title_full | A fragmentation-based study of heavy quark production |
| title_fullStr | A fragmentation-based study of heavy quark production |
| title_full_unstemmed | A fragmentation-based study of heavy quark production |
| title_short | A fragmentation-based study of heavy quark production |
| title_sort | fragmentation based study of heavy quark production |
| topic | QCD Phenomenology |
| url | https://doi.org/10.1007/JHEP01(2020)196 |
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