On the extraction of $α_\textit{em}(m_Z^2)$ at Tera-$Z$
Fuente:
arXiv
Saved in:
| Main Author: | |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917888077594624 |
|---|---|
| author | Riembau, Marc |
| author_facet | Riembau, Marc |
| contents | The current projected sensitivity on the electromagnetic coupling $α_\textit{em}(m_Z^2)$ represents a bottleneck for the precision electroweak program at FCC-ee. We propose a novel methodology to extract this coupling directly from $Z$-pole data. By comparing the differential distribution of electrons, muons and positrons in the forward region, the approach achieves a projected statistical sensitivity below the $10^{-5}$ level, representing a significant improvement over other methods. We assess the impact of leading parametric uncertainties including that of the top quark mass. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_05508 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On the extraction of $α_\textit{em}(m_Z^2)$ at Tera-$Z$ Riembau, Marc High Energy Physics - Phenomenology High Energy Physics - Experiment The current projected sensitivity on the electromagnetic coupling $α_\textit{em}(m_Z^2)$ represents a bottleneck for the precision electroweak program at FCC-ee. We propose a novel methodology to extract this coupling directly from $Z$-pole data. By comparing the differential distribution of electrons, muons and positrons in the forward region, the approach achieves a projected statistical sensitivity below the $10^{-5}$ level, representing a significant improvement over other methods. We assess the impact of leading parametric uncertainties including that of the top quark mass. |
| title | On the extraction of $α_\textit{em}(m_Z^2)$ at Tera-$Z$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2501.05508 |