The $e^+ e^- \rightarrow Z H$ Process in the SMEFT Beyond Leading Order
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917915919384576 |
|---|---|
| author | Asteriadis, Konstantin Dawson, Sally Giardino, Pier Paolo Szafron, Robert |
| author_facet | Asteriadis, Konstantin Dawson, Sally Giardino, Pier Paolo Szafron, Robert |
| contents | We systematically study potential effects of Beyond the Standard Model physics in the $e^+ e^- \rightarrow Z H$ process. To this end, we include all relevant dimension-6 Standard Model Effective Field Theory operators and work to next-to-leading order (NLO) accuracy in the electroweak coupling. We consider both polarized and unpolarized electron and positron beams and present results for $\sqrt{s}=240, ~365$ and $500~{\rm GeV}$, emphasizing contributions where the NLO predictions differ significantly from the leading order results. At NLO, a sensitivity arises to operators that do not contribute at tree level, such as the Higgs tri-linear coupling, CP-violating operators, and dimension-6 operators involving the top quark, among many others. We compare the prospects of future $e^+e^-$ colliders to explore these new physics effects with existing measurements from the LHC, electron EDMs (for CP violating operators), and Z pole measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_11466 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The $e^+ e^- \rightarrow Z H$ Process in the SMEFT Beyond Leading Order Asteriadis, Konstantin Dawson, Sally Giardino, Pier Paolo Szafron, Robert High Energy Physics - Phenomenology We systematically study potential effects of Beyond the Standard Model physics in the $e^+ e^- \rightarrow Z H$ process. To this end, we include all relevant dimension-6 Standard Model Effective Field Theory operators and work to next-to-leading order (NLO) accuracy in the electroweak coupling. We consider both polarized and unpolarized electron and positron beams and present results for $\sqrt{s}=240, ~365$ and $500~{\rm GeV}$, emphasizing contributions where the NLO predictions differ significantly from the leading order results. At NLO, a sensitivity arises to operators that do not contribute at tree level, such as the Higgs tri-linear coupling, CP-violating operators, and dimension-6 operators involving the top quark, among many others. We compare the prospects of future $e^+e^-$ colliders to explore these new physics effects with existing measurements from the LHC, electron EDMs (for CP violating operators), and Z pole measurements. |
| title | The $e^+ e^- \rightarrow Z H$ Process in the SMEFT Beyond Leading Order |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2409.11466 |