Low-Multiplicity Jets as Probes of GeV-Scale Light-Quark-Coupled Particles
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866917427178110976 |
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| author | de Lima, Carlos Henrique McKeen, David Swiatlowski, Maximilian |
| author_facet | de Lima, Carlos Henrique McKeen, David Swiatlowski, Maximilian |
| contents | We propose a search at the LHC for GeV-scale particles coupling predominantly to light quarks based on low-multiplicity jets. The search targets production in association with a hard photon and uses the feature that a light gauge-singlet can only decay into a small number of hadronic channels, yielding jets with anomalously low charged-track multiplicity and mass compared to QCD jets at the same transverse momentum. We determine the sensitivity to scalar and pseudoscalar couplings to up-quarks, and suggest a data-driven estimate that reduces the sensitivity to jet modeling uncertainties. This search extends the reach to hadronically-coupled particles into a previously inaccessible regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_19864 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Low-Multiplicity Jets as Probes of GeV-Scale Light-Quark-Coupled Particles de Lima, Carlos Henrique McKeen, David Swiatlowski, Maximilian High Energy Physics - Phenomenology High Energy Physics - Experiment We propose a search at the LHC for GeV-scale particles coupling predominantly to light quarks based on low-multiplicity jets. The search targets production in association with a hard photon and uses the feature that a light gauge-singlet can only decay into a small number of hadronic channels, yielding jets with anomalously low charged-track multiplicity and mass compared to QCD jets at the same transverse momentum. We determine the sensitivity to scalar and pseudoscalar couplings to up-quarks, and suggest a data-driven estimate that reduces the sensitivity to jet modeling uncertainties. This search extends the reach to hadronically-coupled particles into a previously inaccessible regime. |
| title | Low-Multiplicity Jets as Probes of GeV-Scale Light-Quark-Coupled Particles |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2604.19864 |