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| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| Accesso online: | https://arxiv.org/abs/2601.15255 |
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| _version_ | 1866910027109892096 |
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| author | Bhattarai, Prithak Brandt, Andrew Bross, Alan Brown, Bradley Chakraborty, Samriddha Che, Haohui Dev, Bhupal Dutta, Bhaskar Estrada, Juan V. Garcia, Eric Gomez, Anthony Gurung, Gajendra Hernandez, Brian Joshua Gomez Jang, Wooyoung Jo, Jay Hyun Jodłowski, Krzysztof Kim, Doojin Kim, Eunsu Kim, Hyunyong Kim, Shin Hyung Kim, Young-Kee Liu, Jing Moon, Chang-Seong Naples, Donna Nygren, David Oh, Minseok Paolone, Vittorio Park, Hyangkyu Park, Jong-Chul Pastika, Nathaniel J. Raut, Rohit Reichenbacher, Juergen Rubinov, Paul Seo, Eunsuk Shalamova, Veronika Shin, Seodong Shochet, Melvin Thompson, Adrian Wah, Yau Westerdale, Shawn Yang, Guang Yang, Un-Ki Yoon, Inseok Yu, Jaehoon |
| author_facet | Bhattarai, Prithak Brandt, Andrew Bross, Alan Brown, Bradley Chakraborty, Samriddha Che, Haohui Dev, Bhupal Dutta, Bhaskar Estrada, Juan V. Garcia, Eric Gomez, Anthony Gurung, Gajendra Hernandez, Brian Joshua Gomez Jang, Wooyoung Jo, Jay Hyun Jodłowski, Krzysztof Kim, Doojin Kim, Eunsu Kim, Hyunyong Kim, Shin Hyung Kim, Young-Kee Liu, Jing Moon, Chang-Seong Naples, Donna Nygren, David Oh, Minseok Paolone, Vittorio Park, Hyangkyu Park, Jong-Chul Pastika, Nathaniel J. Raut, Rohit Reichenbacher, Juergen Rubinov, Paul Seo, Eunsuk Shalamova, Veronika Shin, Seodong Shochet, Melvin Thompson, Adrian Wah, Yau Westerdale, Shawn Yang, Guang Yang, Un-Ki Yoon, Inseok Yu, Jaehoon |
| contents | DAMSA (DArk Messenger Searches at an Accelerator) is a novel short-baseline accelerator experiment aimed at probing short-lived physics processes, including searches for evidence of a dark sector of particle physics and well-motivated Standard Model signals. Motivated by open questions in neutrino physics and the absence of conclusive evidence for conventional weakly interacting massive particles, DAMSA targets MeV-to-sub-GeV dark-sector messengers with feeble couplings that can be produced in abundance at the PIP-II LINAC. By employing an ultra-short baseline of order one meter, DAMSA is uniquely positioned to overcome the beam-dump "ceiling" that limits sensitivity to promptly decaying particles in longer-baseline experiments. The conceptual design emphasizes a beam-dump production scheme combined with a compact detector optimized for rare decays while mitigating intense neutron-induced backgrounds inherent to high-power proton beams. To validate the experimental strategy and detector technologies, the Little DAMSA Path-Finder (LDPF) proof-of-concept experiment is proposed, focusing on axion-like particles decaying to two photons and operating with 300 MeV electron beams at FAST. Successful realization of LDPF will establish the feasibility of the DAMSA approach, enabling a broad and powerful program to explore short-lived new physics and precision Standard Model processes in a previously inaccessible regime. This conceptual design document outlines the technical details of DAMSA's physics goals, the beam facility proposals, key experimental challenges and how to overcome them, and the proposed experimental staging campaigns. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_15255 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | DAMSA Experiment Conceptual Design White Paper Bhattarai, Prithak Brandt, Andrew Bross, Alan Brown, Bradley Chakraborty, Samriddha Che, Haohui Dev, Bhupal Dutta, Bhaskar Estrada, Juan V. Garcia, Eric Gomez, Anthony Gurung, Gajendra Hernandez, Brian Joshua Gomez Jang, Wooyoung Jo, Jay Hyun Jodłowski, Krzysztof Kim, Doojin Kim, Eunsu Kim, Hyunyong Kim, Shin Hyung Kim, Young-Kee Liu, Jing Moon, Chang-Seong Naples, Donna Nygren, David Oh, Minseok Paolone, Vittorio Park, Hyangkyu Park, Jong-Chul Pastika, Nathaniel J. Raut, Rohit Reichenbacher, Juergen Rubinov, Paul Seo, Eunsuk Shalamova, Veronika Shin, Seodong Shochet, Melvin Thompson, Adrian Wah, Yau Westerdale, Shawn Yang, Guang Yang, Un-Ki Yoon, Inseok Yu, Jaehoon High Energy Physics - Experiment High Energy Physics - Phenomenology DAMSA (DArk Messenger Searches at an Accelerator) is a novel short-baseline accelerator experiment aimed at probing short-lived physics processes, including searches for evidence of a dark sector of particle physics and well-motivated Standard Model signals. Motivated by open questions in neutrino physics and the absence of conclusive evidence for conventional weakly interacting massive particles, DAMSA targets MeV-to-sub-GeV dark-sector messengers with feeble couplings that can be produced in abundance at the PIP-II LINAC. By employing an ultra-short baseline of order one meter, DAMSA is uniquely positioned to overcome the beam-dump "ceiling" that limits sensitivity to promptly decaying particles in longer-baseline experiments. The conceptual design emphasizes a beam-dump production scheme combined with a compact detector optimized for rare decays while mitigating intense neutron-induced backgrounds inherent to high-power proton beams. To validate the experimental strategy and detector technologies, the Little DAMSA Path-Finder (LDPF) proof-of-concept experiment is proposed, focusing on axion-like particles decaying to two photons and operating with 300 MeV electron beams at FAST. Successful realization of LDPF will establish the feasibility of the DAMSA approach, enabling a broad and powerful program to explore short-lived new physics and precision Standard Model processes in a previously inaccessible regime. This conceptual design document outlines the technical details of DAMSA's physics goals, the beam facility proposals, key experimental challenges and how to overcome them, and the proposed experimental staging campaigns. |
| title | DAMSA Experiment Conceptual Design White Paper |
| topic | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2601.15255 |