Sensitivity of the FCC-ee to axion-like particles at different center-of-mass energies
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866916032029917184 |
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| author | Alimena, Juliette Bakhishova, Elnura Blekman, Freya Abdelhafiz, Jannah Darwish Dorofeev, Christina Niedziela, Jeremi Polesello, Giacomo Przybyl, Anna Rygaard, Lovisa |
| author_facet | Alimena, Juliette Bakhishova, Elnura Blekman, Freya Abdelhafiz, Jannah Darwish Dorofeev, Christina Niedziela, Jeremi Polesello, Giacomo Przybyl, Anna Rygaard, Lovisa |
| contents | The sensitivity of the proposed FCC-ee collider to axion-like particles (ALPs) is investigated at all planned center-of-mass energies, with focus on the case where the ALP couples primarily to electroweak gauge bosons at leading order. We study the associated production of the ALP with a photon, with the ALP decaying in turn to two photons, yielding a three-photon final state. The ALP coupling to the photon is evaluated for ALP masses of 5 to 320 GeV. In this effective model, the FCC-ee will be able to detect ALPs for couplings down to a few $10^{-6} \mathrm{GeV}^{-1}$ ($10^{-5} \mathrm{GeV}^{-1}$) during the Z pole run (WW, ZH, and $t\bar{t}$ threshold runs). Additionally, this final state has the potential to probe the underlying electroweak structure of ALP couplings for ALP masses below the $Z$-boson mass. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_21452 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Sensitivity of the FCC-ee to axion-like particles at different center-of-mass energies Alimena, Juliette Bakhishova, Elnura Blekman, Freya Abdelhafiz, Jannah Darwish Dorofeev, Christina Niedziela, Jeremi Polesello, Giacomo Przybyl, Anna Rygaard, Lovisa High Energy Physics - Phenomenology High Energy Physics - Experiment The sensitivity of the proposed FCC-ee collider to axion-like particles (ALPs) is investigated at all planned center-of-mass energies, with focus on the case where the ALP couples primarily to electroweak gauge bosons at leading order. We study the associated production of the ALP with a photon, with the ALP decaying in turn to two photons, yielding a three-photon final state. The ALP coupling to the photon is evaluated for ALP masses of 5 to 320 GeV. In this effective model, the FCC-ee will be able to detect ALPs for couplings down to a few $10^{-6} \mathrm{GeV}^{-1}$ ($10^{-5} \mathrm{GeV}^{-1}$) during the Z pole run (WW, ZH, and $t\bar{t}$ threshold runs). Additionally, this final state has the potential to probe the underlying electroweak structure of ALP couplings for ALP masses below the $Z$-boson mass. |
| title | Sensitivity of the FCC-ee to axion-like particles at different center-of-mass energies |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2605.21452 |