Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | https://arxiv.org/abs/2512.06916 |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866918236285566976 |
|---|---|
| author | Allwicher, Lukas Grojean, Christophe Tabatt, Lucine |
| author_facet | Allwicher, Lukas Grojean, Christophe Tabatt, Lucine |
| contents | The measurement of the Higgs self-coupling is considered the next milestone in the study of the Higgs boson properties. At future $e^+e^-$ facilities below the double Higgs production threshold, this is extracted from the $Zh$ production cross-section, which is sensitive to the trilinear coupling at the one-loop level. At the same perturbative order, potential effects beyond the Standard Model (SM) may affect the Higgstrahlung rate and distort the self-coupling determination. We study the question focusing especially on contact interactions containing two electron and two top-quark fields. We conclude that, in the context of FCC-ee and its planned runs at different energies, $eett$ interactions change the Higgs self-coupling sensitivity below the percent level. Even in the most pessimistic scenarios, we confirm a robust sensitivity of the order of 17% at the 1$σ$ confidence level under the assumption of otherwise SM-like Higgs couplings. A crucial role in these results is played by the measurement of fermion pair production above the $Z$ resonance. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_06916 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Could electron-top interactions spoil the measurement of the Higgs trilinear? -A quantitative estimate at future lepton colliders- Allwicher, Lukas Grojean, Christophe Tabatt, Lucine High Energy Physics - Phenomenology The measurement of the Higgs self-coupling is considered the next milestone in the study of the Higgs boson properties. At future $e^+e^-$ facilities below the double Higgs production threshold, this is extracted from the $Zh$ production cross-section, which is sensitive to the trilinear coupling at the one-loop level. At the same perturbative order, potential effects beyond the Standard Model (SM) may affect the Higgstrahlung rate and distort the self-coupling determination. We study the question focusing especially on contact interactions containing two electron and two top-quark fields. We conclude that, in the context of FCC-ee and its planned runs at different energies, $eett$ interactions change the Higgs self-coupling sensitivity below the percent level. Even in the most pessimistic scenarios, we confirm a robust sensitivity of the order of 17% at the 1$σ$ confidence level under the assumption of otherwise SM-like Higgs couplings. A crucial role in these results is played by the measurement of fermion pair production above the $Z$ resonance. |
| title | Could electron-top interactions spoil the measurement of the Higgs trilinear? -A quantitative estimate at future lepton colliders- |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2512.06916 |