New Physics Searches via Beam Normal Spin Asymmetry in Bhabha Scattering
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866908981554839552 |
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| author | Pustyntsev, Aleksandr Ramasamy, Muthubharathi S. Vanderhaeghen, Marc |
| author_facet | Pustyntsev, Aleksandr Ramasamy, Muthubharathi S. Vanderhaeghen, Marc |
| contents | We examine the sensitivity of the beam normal spin asymmetry in Bhabha scattering to beyond the Standard Model (BSM) mediators, in the context of the JLab polarized positron program. A key property of this observable is that the Standard Model contribution exhibits a zero crossing at a fixed scattering angle, providing a clean, effectively background-free point for these searches. We consider scalar, vector, and axial vector mediators and present projected bounds, finding that scalar and vector scenarios allow a significant extension of the search ranges beyond existing constraints. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_22568 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | New Physics Searches via Beam Normal Spin Asymmetry in Bhabha Scattering Pustyntsev, Aleksandr Ramasamy, Muthubharathi S. Vanderhaeghen, Marc High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory We examine the sensitivity of the beam normal spin asymmetry in Bhabha scattering to beyond the Standard Model (BSM) mediators, in the context of the JLab polarized positron program. A key property of this observable is that the Standard Model contribution exhibits a zero crossing at a fixed scattering angle, providing a clean, effectively background-free point for these searches. We consider scalar, vector, and axial vector mediators and present projected bounds, finding that scalar and vector scenarios allow a significant extension of the search ranges beyond existing constraints. |
| title | New Physics Searches via Beam Normal Spin Asymmetry in Bhabha Scattering |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2511.22568 |