Probing a Light Scalar Boson with a few-MeV Proton Beam Deep Underground
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866914132033273856 |
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| author | Broggini, Carlo Di Carlo, Giuseppe Di Luzio, Luca Piatti, Denise Toni, Claudio |
| author_facet | Broggini, Carlo Di Carlo, Giuseppe Di Luzio, Luca Piatti, Denise Toni, Claudio |
| contents | We propose to investigate the production of a light scalar boson $ϕ$ in low-energy proton-nucleus interactions using the 3.5 MV accelerator of the Bellotti Ion Beam Facility, located in the underground Gran Sasso National Laboratory. Nuclear reactions induced by a few-MeV proton beam on suitable target materials can act as a controlled source of $ϕ$ particles. Owing to the deep-underground location, the facility benefits from substantial cosmic-ray shielding, enabling searches for rare processes with minimal background. The produced $ϕ$ particles will be sought with large-volume, low-background detectors already operating or currently under construction at the Gran Sasso National Laboratory. This approach combines a tunable accelerator-based production mechanism with the exceptional sensitivity of underground rare-event searches, offering a novel avenue to probe light scalar bosons beyond the Standard Model. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_03486 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing a Light Scalar Boson with a few-MeV Proton Beam Deep Underground Broggini, Carlo Di Carlo, Giuseppe Di Luzio, Luca Piatti, Denise Toni, Claudio High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment We propose to investigate the production of a light scalar boson $ϕ$ in low-energy proton-nucleus interactions using the 3.5 MV accelerator of the Bellotti Ion Beam Facility, located in the underground Gran Sasso National Laboratory. Nuclear reactions induced by a few-MeV proton beam on suitable target materials can act as a controlled source of $ϕ$ particles. Owing to the deep-underground location, the facility benefits from substantial cosmic-ray shielding, enabling searches for rare processes with minimal background. The produced $ϕ$ particles will be sought with large-volume, low-background detectors already operating or currently under construction at the Gran Sasso National Laboratory. This approach combines a tunable accelerator-based production mechanism with the exceptional sensitivity of underground rare-event searches, offering a novel avenue to probe light scalar bosons beyond the Standard Model. |
| title | Probing a Light Scalar Boson with a few-MeV Proton Beam Deep Underground |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment |
| url | https://arxiv.org/abs/2509.03486 |