Higgs pair production in the 2HDM: impact of loop corrections to the trilinear Higgs couplings and interference effects on experimental limits
Abstract The results obtained at the LHC for constraining the trilinear Higgs self-coupling of the detected Higgs boson at about 125 GeV, $$\lambda _{hhh}$$ λ hhh , via the Higgs pair production process have significantly improved during the last years. We investigate the impact of potentially large...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-04-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14124-x |
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| author | S. Heinemeyer M. Mühlleitner K. Radchenko G. Weiglein |
| author_facet | S. Heinemeyer M. Mühlleitner K. Radchenko G. Weiglein |
| author_sort | S. Heinemeyer |
| collection | DOAJ |
| description | Abstract The results obtained at the LHC for constraining the trilinear Higgs self-coupling of the detected Higgs boson at about 125 GeV, $$\lambda _{hhh}$$ λ hhh , via the Higgs pair production process have significantly improved during the last years. We investigate the impact of potentially large higher-order corrections and interference effects on the comparison between the experimental results and the theoretical predictions for the pair production of the 125 GeV Higgs boson at the LHC. We use the theoretical framework of the Two Higgs Doublet Model (2HDM), containing besides the SM-like $${\mathcal{C}\mathcal{P}}$$ C P -even Higgs boson h a second $${\mathcal{C}\mathcal{P}}$$ C P -even Higgs boson H, which we assume to be heavier, $$mH > mh$$ m H > m h . We analyze in particular the invariant mass distribution of the two produced Higgs bosons and show that the loop corrections to the trilinear Higgs couplings $$\lambda _{hhh}$$ λ hhh and $$\lambda _{hhH}$$ λ hhH as well as interference contributions give rise to important effects both for the differential and the total cross section. We point out the implications for the experimental limits that can be obtained in the 2HDM for the case of the resonant production of the heavy Higgs boson H. We emphasize the importance of the inclusion of interference effects between resonant and non-resonant contributions in the experimental analysis for a reliable determination of exclusion bounds for a heavy resonance of an extended Higgs sector. |
| format | Article |
| id | doaj-art-5a6d449ec6e24c10830eb9c2efb3512a |
| institution | OA Journals |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-5a6d449ec6e24c10830eb9c2efb3512a2025-08-20T02:17:52ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-04-0185411610.1140/epjc/s10052-025-14124-xHiggs pair production in the 2HDM: impact of loop corrections to the trilinear Higgs couplings and interference effects on experimental limitsS. Heinemeyer0M. Mühlleitner1K. Radchenko2G. Weiglein3Instituto de Física Teórica (UAM/CSIC), Universidad Autónoma de MadridInstitute for Theoretical Physics, Karlsruhe Institute of TechnologyDeutsches Elektronen-Synchrotron DESYDeutsches Elektronen-Synchrotron DESYAbstract The results obtained at the LHC for constraining the trilinear Higgs self-coupling of the detected Higgs boson at about 125 GeV, $$\lambda _{hhh}$$ λ hhh , via the Higgs pair production process have significantly improved during the last years. We investigate the impact of potentially large higher-order corrections and interference effects on the comparison between the experimental results and the theoretical predictions for the pair production of the 125 GeV Higgs boson at the LHC. We use the theoretical framework of the Two Higgs Doublet Model (2HDM), containing besides the SM-like $${\mathcal{C}\mathcal{P}}$$ C P -even Higgs boson h a second $${\mathcal{C}\mathcal{P}}$$ C P -even Higgs boson H, which we assume to be heavier, $$mH > mh$$ m H > m h . We analyze in particular the invariant mass distribution of the two produced Higgs bosons and show that the loop corrections to the trilinear Higgs couplings $$\lambda _{hhh}$$ λ hhh and $$\lambda _{hhH}$$ λ hhH as well as interference contributions give rise to important effects both for the differential and the total cross section. We point out the implications for the experimental limits that can be obtained in the 2HDM for the case of the resonant production of the heavy Higgs boson H. We emphasize the importance of the inclusion of interference effects between resonant and non-resonant contributions in the experimental analysis for a reliable determination of exclusion bounds for a heavy resonance of an extended Higgs sector.https://doi.org/10.1140/epjc/s10052-025-14124-x |
| spellingShingle | S. Heinemeyer M. Mühlleitner K. Radchenko G. Weiglein Higgs pair production in the 2HDM: impact of loop corrections to the trilinear Higgs couplings and interference effects on experimental limits European Physical Journal C: Particles and Fields |
| title | Higgs pair production in the 2HDM: impact of loop corrections to the trilinear Higgs couplings and interference effects on experimental limits |
| title_full | Higgs pair production in the 2HDM: impact of loop corrections to the trilinear Higgs couplings and interference effects on experimental limits |
| title_fullStr | Higgs pair production in the 2HDM: impact of loop corrections to the trilinear Higgs couplings and interference effects on experimental limits |
| title_full_unstemmed | Higgs pair production in the 2HDM: impact of loop corrections to the trilinear Higgs couplings and interference effects on experimental limits |
| title_short | Higgs pair production in the 2HDM: impact of loop corrections to the trilinear Higgs couplings and interference effects on experimental limits |
| title_sort | higgs pair production in the 2hdm impact of loop corrections to the trilinear higgs couplings and interference effects on experimental limits |
| url | https://doi.org/10.1140/epjc/s10052-025-14124-x |
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