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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2511.09778 |
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| _version_ | 1866911262479220736 |
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| author | Dawson, Sally Roy, Arnab Valencia, German |
| author_facet | Dawson, Sally Roy, Arnab Valencia, German |
| contents | We discuss the HL-LHC sensitivity to probe new invisible particles including scalars and fermions using semi-visible Higgs decays. The kinematics of these decays allow new particle masses below $m\lesssim 50$ GeV. We carry out our analysis within the framework of a dark-SMEFT effective theory with operators up to dimension six and a discrete $\mathbb{Z}_2$ symmetry under which the new particles are odd and the SM particles are even. We compare our results to those obtained from considering the invisible $Z$-width, as well as simple perturbative unitarity arguments. Finally, we outline kinematic strategies at the LHC to distinguish different operator structures of the postulated invisible particles. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_09778 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Semi-visible higgs decay as a probe for new invisible particles Dawson, Sally Roy, Arnab Valencia, German High Energy Physics - Phenomenology We discuss the HL-LHC sensitivity to probe new invisible particles including scalars and fermions using semi-visible Higgs decays. The kinematics of these decays allow new particle masses below $m\lesssim 50$ GeV. We carry out our analysis within the framework of a dark-SMEFT effective theory with operators up to dimension six and a discrete $\mathbb{Z}_2$ symmetry under which the new particles are odd and the SM particles are even. We compare our results to those obtained from considering the invisible $Z$-width, as well as simple perturbative unitarity arguments. Finally, we outline kinematic strategies at the LHC to distinguish different operator structures of the postulated invisible particles. |
| title | Semi-visible higgs decay as a probe for new invisible particles |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.09778 |