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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.15912 |
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| _version_ | 1866909797711872000 |
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| author | Cacciapaglia, Giacomo Sannino, Francesco Turner, Jessica |
| author_facet | Cacciapaglia, Giacomo Sannino, Francesco Turner, Jessica |
| contents | The presence of a topological susceptibility in the electroweak sector of the Standard Model implies the existence of a pseudoscalar state in the spectrum, $η_W$. We show that, within the Standard Model, no new particle is required to form this state. We identify the $η_W$ state with the CP-odd linear combination of the ground states of hydrogen and antihydrogen atoms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_15912 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hiding in Plain Sight, the electroweak $η_W$ Cacciapaglia, Giacomo Sannino, Francesco Turner, Jessica High Energy Physics - Phenomenology High Energy Physics - Theory Nuclear Theory The presence of a topological susceptibility in the electroweak sector of the Standard Model implies the existence of a pseudoscalar state in the spectrum, $η_W$. We show that, within the Standard Model, no new particle is required to form this state. We identify the $η_W$ state with the CP-odd linear combination of the ground states of hydrogen and antihydrogen atoms. |
| title | Hiding in Plain Sight, the electroweak $η_W$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Theory Nuclear Theory |
| url | https://arxiv.org/abs/2509.15912 |