Polarized ZZ pairs in gluon fusion and vector boson fusion at the LHC
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866914840579145728 |
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| author | Javurkova, Martina Ruiz, Richard de Sá, Rafael Coelho Lopes Sandesara, Jay |
| author_facet | Javurkova, Martina Ruiz, Richard de Sá, Rafael Coelho Lopes Sandesara, Jay |
| contents | Pair production of helicity-polarized weak bosons $(V_λ=W^\pm_λ, Z_λ)$ from gluon fusion $(gg\to V_λV'_{λ'})$ and weak boson fusion $(V_1V_2\to V_λV'_{λ'})$ are powerful probes of the Standard Model, new physics, and properties of quantum systems. Measuring cross sections of polarized processes is a chief objective of the Large Hadron Collider's (LHC) Run 3 and high luminosity programs, but progress is limited by the simulation tools that are presently available. We propose a method for computing polarized cross sections that works by directly modifying Feynman rules instead of (squared) amplitudes. The method is applicable to loop-induced processes, and can capture the interference between arbitrary polarization configurations, interference with non-resonant diagrams, as well as off-shell/finite-width effects. By construction, previous results that work at the (squared) amplitude level are recoverable. As a demonstration, we report the prospect of observing and studying polarized $Z_λZ_{λ'}$ pairs when produced via gluon fusion and electroweak processes in final-states with four charged leptons at the LHC, using the new method to simulate the gluon fusion process. Our Feynman rules are publicly available as a set of \textit{Universal FeynRules Object} libraries called \texttt{SM\_Loop\_VPolar}. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_17365 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Polarized ZZ pairs in gluon fusion and vector boson fusion at the LHC Javurkova, Martina Ruiz, Richard de Sá, Rafael Coelho Lopes Sandesara, Jay High Energy Physics - Phenomenology High Energy Physics - Experiment Pair production of helicity-polarized weak bosons $(V_λ=W^\pm_λ, Z_λ)$ from gluon fusion $(gg\to V_λV'_{λ'})$ and weak boson fusion $(V_1V_2\to V_λV'_{λ'})$ are powerful probes of the Standard Model, new physics, and properties of quantum systems. Measuring cross sections of polarized processes is a chief objective of the Large Hadron Collider's (LHC) Run 3 and high luminosity programs, but progress is limited by the simulation tools that are presently available. We propose a method for computing polarized cross sections that works by directly modifying Feynman rules instead of (squared) amplitudes. The method is applicable to loop-induced processes, and can capture the interference between arbitrary polarization configurations, interference with non-resonant diagrams, as well as off-shell/finite-width effects. By construction, previous results that work at the (squared) amplitude level are recoverable. As a demonstration, we report the prospect of observing and studying polarized $Z_λZ_{λ'}$ pairs when produced via gluon fusion and electroweak processes in final-states with four charged leptons at the LHC, using the new method to simulate the gluon fusion process. Our Feynman rules are publicly available as a set of \textit{Universal FeynRules Object} libraries called \texttt{SM\_Loop\_VPolar}. |
| title | Polarized ZZ pairs in gluon fusion and vector boson fusion at the LHC |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2401.17365 |