Quark-universal $U(1)$ breaking scalar at the LHC
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866908396410634240 |
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| author | Armbruster, Lorin Dobrescu, Bogdan A. Yu, Felix |
| author_facet | Armbruster, Lorin Dobrescu, Bogdan A. Yu, Felix |
| contents | If the quarks or leptons are charged under a new $U(1)$ gauge symmetry, then besides a $Z'$ boson there must exist at least one new boson whose decay products include Standard Model particles. In the case of a minimal symmetry breaking sector, that new boson is a scalar $ϕ$ that couples to the $Z'$ boson as well as to the new fermions required to cancel the $U(1)$ gauge anomalies. The scalar may be produced at the LHC in association with a $Z'$ boson, or through $Z'$ boson fusion, while its decays are typically into four jets or two photons. We analyze in detail the case where the $Z'$ boson is leptophobic, and all the quarks have the same charge under the new $U(1)$. If $ϕ$ mixes with the Standard Model Higgs boson, then the new scalar can also be produced via gluon fusion, and the discovery mode is likely to be a diphoton resonance. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_06068 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quark-universal $U(1)$ breaking scalar at the LHC Armbruster, Lorin Dobrescu, Bogdan A. Yu, Felix High Energy Physics - Phenomenology If the quarks or leptons are charged under a new $U(1)$ gauge symmetry, then besides a $Z'$ boson there must exist at least one new boson whose decay products include Standard Model particles. In the case of a minimal symmetry breaking sector, that new boson is a scalar $ϕ$ that couples to the $Z'$ boson as well as to the new fermions required to cancel the $U(1)$ gauge anomalies. The scalar may be produced at the LHC in association with a $Z'$ boson, or through $Z'$ boson fusion, while its decays are typically into four jets or two photons. We analyze in detail the case where the $Z'$ boson is leptophobic, and all the quarks have the same charge under the new $U(1)$. If $ϕ$ mixes with the Standard Model Higgs boson, then the new scalar can also be produced via gluon fusion, and the discovery mode is likely to be a diphoton resonance. |
| title | Quark-universal $U(1)$ breaking scalar at the LHC |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2506.06068 |