Automated NLO calculations for asymmetric hadron-hadron collisions in MadGraph5_aMC@NLO
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arXiv
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| Format: | Preprint |
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2025
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| author | Flore, Carlo Kikoła, Daniel Kusina, Aleksander Lansberg, Jean-Philippe Mattelaer, Olivier Safronov, Anton |
| author_facet | Flore, Carlo Kikoła, Daniel Kusina, Aleksander Lansberg, Jean-Philippe Mattelaer, Olivier Safronov, Anton |
| contents | We have extended {\tt MadGraph5\_aMC@NLO} capabilities by implementing computations for asymmetric hadron-hadron collisions, including proton-nucleus, pion-hadron or nucleus-nucleus collisions in order to obtain a tool for automated perturbative computations of cross sections (or ratios of cross sections) in asymmetric reactions at next-to-leading (NLO) order in $α_S$ in collinear factorisation. This tool, like the original symmetric version of \texttt{MadGraph5\_aMC@NLO}, automatically computes cross sections for different factorisation and renormalisation scales and PDFs provided by the {\tt LHAPDF} library, thereby allowing for an easy assessment of the associated theoretical uncertainties. In this paper, we present the validation of our code using $W$ and $Z$ boson production in $p$Pb collisions and Drell-Yan-pair production in $πW$ collisions. We also illustrate the capabilities of the framework by providing cross section and nuclear modification factors with their uncertainties for the production of $W$ and $Z$ bosons, charm and bottom quarks as well as associated production of $b\bar b+H^0$ in $p$Pb collisions at the LHC. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_14487 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Automated NLO calculations for asymmetric hadron-hadron collisions in MadGraph5_aMC@NLO Flore, Carlo Kikoła, Daniel Kusina, Aleksander Lansberg, Jean-Philippe Mattelaer, Olivier Safronov, Anton High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment Nuclear Theory We have extended {\tt MadGraph5\_aMC@NLO} capabilities by implementing computations for asymmetric hadron-hadron collisions, including proton-nucleus, pion-hadron or nucleus-nucleus collisions in order to obtain a tool for automated perturbative computations of cross sections (or ratios of cross sections) in asymmetric reactions at next-to-leading (NLO) order in $α_S$ in collinear factorisation. This tool, like the original symmetric version of \texttt{MadGraph5\_aMC@NLO}, automatically computes cross sections for different factorisation and renormalisation scales and PDFs provided by the {\tt LHAPDF} library, thereby allowing for an easy assessment of the associated theoretical uncertainties. In this paper, we present the validation of our code using $W$ and $Z$ boson production in $p$Pb collisions and Drell-Yan-pair production in $πW$ collisions. We also illustrate the capabilities of the framework by providing cross section and nuclear modification factors with their uncertainties for the production of $W$ and $Z$ bosons, charm and bottom quarks as well as associated production of $b\bar b+H^0$ in $p$Pb collisions at the LHC. |
| title | Automated NLO calculations for asymmetric hadron-hadron collisions in MadGraph5_aMC@NLO |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2501.14487 |