On the new physics in Bhabha luminometry at future $e^+e^-$ colliders
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914214399967232 |
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| author | Del Pio, Clara L. Ucci, Francesco P. |
| author_facet | Del Pio, Clara L. Ucci, Francesco P. |
| contents | The absolute machine luminosity is a key quantity to achieve the high-precision physics program of future $e^+e^-$ collider. It is determined by measuring a theoretically well-known process, which, ideally, can be computed with arbitrary precision in the perturbation theory. However, yet undiscovered new physics could give a non-negligible contribution to the cross section of the luminosity monitoring process, thus invalidating the uncertainty determination of measured quantities. We assess the theoretical error of non-Standard Model origin to the small-angle Bhabha scattering in various future colliders scenarios. In addition, a possible running strategy to constrain unknown heavy interactions is proposed, relying on asymmetries that do not depend on the absolute luminosity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_19423 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On the new physics in Bhabha luminometry at future $e^+e^-$ colliders Del Pio, Clara L. Ucci, Francesco P. High Energy Physics - Phenomenology The absolute machine luminosity is a key quantity to achieve the high-precision physics program of future $e^+e^-$ collider. It is determined by measuring a theoretically well-known process, which, ideally, can be computed with arbitrary precision in the perturbation theory. However, yet undiscovered new physics could give a non-negligible contribution to the cross section of the luminosity monitoring process, thus invalidating the uncertainty determination of measured quantities. We assess the theoretical error of non-Standard Model origin to the small-angle Bhabha scattering in various future colliders scenarios. In addition, a possible running strategy to constrain unknown heavy interactions is proposed, relying on asymmetries that do not depend on the absolute luminosity. |
| title | On the new physics in Bhabha luminometry at future $e^+e^-$ colliders |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2512.19423 |