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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2512.24376 |
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| _version_ | 1866915700906393600 |
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| author | Su, Shufang Su, Wei Yang, Jin Min Zhu, Pengxuan Zhu, Rui |
| author_facet | Su, Shufang Su, Wei Yang, Jin Min Zhu, Pengxuan Zhu, Rui |
| contents | In the Minimal Supersymmetric Standard Model (MSSM), compressed Higgsinos spectrum ($Δm^0 \lesssim 1$ GeV) occurs when $|μ| \ll |M_1|, |M_2|$ and ${\rm sign}(M_1\cdot M_2)<0$, which leads to a long-lived next-to-lightest neutralino. Such a long-lived neutralino could be copiously produced at the LHC, however escape the detection at the LHC main detectors. We examine the discovery potential at the FASER experiment and find that the FASER 2 could cover the neutral Higgsino mass up to about 130 GeV with mass splitting between 4 to 30 MeV. It is complementary to both the LHC Higgsino search in the $Δm^{0,\pm} \gtrsim 1$ GeV region, and displaced vertex and disappearing track searches of charginos with $Δm^\pm \lesssim 1$ GeV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_24376 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing compressed Higgsinos at the FASER experiment Su, Shufang Su, Wei Yang, Jin Min Zhu, Pengxuan Zhu, Rui High Energy Physics - Phenomenology In the Minimal Supersymmetric Standard Model (MSSM), compressed Higgsinos spectrum ($Δm^0 \lesssim 1$ GeV) occurs when $|μ| \ll |M_1|, |M_2|$ and ${\rm sign}(M_1\cdot M_2)<0$, which leads to a long-lived next-to-lightest neutralino. Such a long-lived neutralino could be copiously produced at the LHC, however escape the detection at the LHC main detectors. We examine the discovery potential at the FASER experiment and find that the FASER 2 could cover the neutral Higgsino mass up to about 130 GeV with mass splitting between 4 to 30 MeV. It is complementary to both the LHC Higgsino search in the $Δm^{0,\pm} \gtrsim 1$ GeV region, and displaced vertex and disappearing track searches of charginos with $Δm^\pm \lesssim 1$ GeV. |
| title | Probing compressed Higgsinos at the FASER experiment |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2512.24376 |