A Panoramic Study of $K$-Factors for 111 Processes at the 14 TeV LHC
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866929281922236416 |
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| author | Kim, Dongjoo Lee, Soojin Jung, Hanseok Kim, Dongchan Kim, Jinheung Song, Jeonghyeon |
| author_facet | Kim, Dongjoo Lee, Soojin Jung, Hanseok Kim, Dongchan Kim, Jinheung Song, Jeonghyeon |
| contents | In this comprehensive study, we investigate $K$-factors ($K=σ_{\text{NLO}}/σ_{\text{LO}}\equiv 1+δK$) for a broad array of Standard Model processes at the 14 TeV LHC, which are pivotal for background assessments in Beyond the Standard Model (BSM) searches. Using MadGraph5_aMC@NLO, we calculate the leading-order and next-to-leading order (NLO) cross-sections and compute the corresponding $K$-factors for 111 processes. Our analysis reveals $K$-factors ranging from 1.005 for $pp \to jjj$ to 4.221 for $pp\to W^\pm γγγ$. Key findings include: (i) processes involving photons display significantly high $K$-factors, attributed to gluon-initiated processes at NLO; (ii) processes with multiple particle productions, particularly those involving vector bosons, exhibit elevated $K$-factors due to multiple real emission processes; (iii) there exists an inverse correlation between the number of jets and $δK$, indicating that the addition of jets generally leads to a decrease in $δK$. Additionally, our investigation into differential $K$-factors relative to transverse momentum and invariant mass shows notable increases with higher $p_T$, but minimal changes with invariant mass. This study highlights the indispensable role of precise $K$-factor evaluations for accurate interpretations of BSM search outcomes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16276 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A Panoramic Study of $K$-Factors for 111 Processes at the 14 TeV LHC Kim, Dongjoo Lee, Soojin Jung, Hanseok Kim, Dongchan Kim, Jinheung Song, Jeonghyeon High Energy Physics - Phenomenology High Energy Physics - Experiment In this comprehensive study, we investigate $K$-factors ($K=σ_{\text{NLO}}/σ_{\text{LO}}\equiv 1+δK$) for a broad array of Standard Model processes at the 14 TeV LHC, which are pivotal for background assessments in Beyond the Standard Model (BSM) searches. Using MadGraph5_aMC@NLO, we calculate the leading-order and next-to-leading order (NLO) cross-sections and compute the corresponding $K$-factors for 111 processes. Our analysis reveals $K$-factors ranging from 1.005 for $pp \to jjj$ to 4.221 for $pp\to W^\pm γγγ$. Key findings include: (i) processes involving photons display significantly high $K$-factors, attributed to gluon-initiated processes at NLO; (ii) processes with multiple particle productions, particularly those involving vector bosons, exhibit elevated $K$-factors due to multiple real emission processes; (iii) there exists an inverse correlation between the number of jets and $δK$, indicating that the addition of jets generally leads to a decrease in $δK$. Additionally, our investigation into differential $K$-factors relative to transverse momentum and invariant mass shows notable increases with higher $p_T$, but minimal changes with invariant mass. This study highlights the indispensable role of precise $K$-factor evaluations for accurate interpretations of BSM search outcomes. |
| title | A Panoramic Study of $K$-Factors for 111 Processes at the 14 TeV LHC |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2402.16276 |