Searching for type I seesaw mechanism in a two Heavy Neutral Leptons scenario at FCC-ee
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913806241759232 |
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| author | Ajmal, Sehar Azzi, Patrizia Giappichini, Sofia Klute, Markus Panella, Orlando Presilla, Matteo Zuo, Xunwu |
| author_facet | Ajmal, Sehar Azzi, Patrizia Giappichini, Sofia Klute, Markus Panella, Orlando Presilla, Matteo Zuo, Xunwu |
| contents | This paper investigates the search for heavy neutral leptons (HNL) in the type I seesaw mechanism at the Future Circular Collider in its $e^+e^-$ stage (FCC-ee), considering a luminosity of 125 ab$^{-1}$ collected at $\sqrt{s}=$91.2 GeV. The study examines two generations of heavy neutral leptons produced in association with Standard Model (SM) neutrinos and decaying to a purely leptonic final state. This theoretical framework can explain neutrino oscillations and other open questions of the SM, providing a broader perspective on the relevance of this experimental search. The analysis is performed using a fast simulation of the IDEA detector concept to study potential HNL interactions at the FCC-ee. The sensitivity contours are obtained from a selection of kinematic variables aimed at improving the signal-to-background ratio for the prompt production case. In the case of long-lived HNLs, the background can be almost fully eliminated by exploiting their displaced decay vertices. The study shows that the FCC-ee has a significant sensitivity to observing these objects in a region of the phase space not accessible by other experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_03615 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Searching for type I seesaw mechanism in a two Heavy Neutral Leptons scenario at FCC-ee Ajmal, Sehar Azzi, Patrizia Giappichini, Sofia Klute, Markus Panella, Orlando Presilla, Matteo Zuo, Xunwu High Energy Physics - Phenomenology High Energy Physics - Experiment This paper investigates the search for heavy neutral leptons (HNL) in the type I seesaw mechanism at the Future Circular Collider in its $e^+e^-$ stage (FCC-ee), considering a luminosity of 125 ab$^{-1}$ collected at $\sqrt{s}=$91.2 GeV. The study examines two generations of heavy neutral leptons produced in association with Standard Model (SM) neutrinos and decaying to a purely leptonic final state. This theoretical framework can explain neutrino oscillations and other open questions of the SM, providing a broader perspective on the relevance of this experimental search. The analysis is performed using a fast simulation of the IDEA detector concept to study potential HNL interactions at the FCC-ee. The sensitivity contours are obtained from a selection of kinematic variables aimed at improving the signal-to-background ratio for the prompt production case. In the case of long-lived HNLs, the background can be almost fully eliminated by exploiting their displaced decay vertices. The study shows that the FCC-ee has a significant sensitivity to observing these objects in a region of the phase space not accessible by other experiments. |
| title | Searching for type I seesaw mechanism in a two Heavy Neutral Leptons scenario at FCC-ee |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2410.03615 |