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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.08121 |
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| _version_ | 1866910010305413120 |
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| author | LDMX Collaboration Åkesson, Torsten Berzin, Elizabeth Bravo, Cameron Brennan, Liam Bryngemark, Lene Kristian Butti, Pierfrancesco Delzanno, Filippo Dukes, E. Craig Dutta, Valentina Echenard, Bertrand Ehrlich, Ralf Eichlersmith, Thomas Elén, Einar Furmanski, Andrew Gomez, Victor Graham, Matt Grieco, Chiara Group, Craig Herde, Hannah Herwig, Christian Hitlin, David G. Horoho, Tyler Incandela, Joseph Jay, Nathan Jige, Asahi Ketchum, Wesley Krnjaic, Gordan Li, Amina Ma, Zihan Mans, Jeremiah Suarez, Cristina Mantilla Masanam, Sanjit Masterson, Phillip Metallo, Steven Middleton, Sophie Muse, Joseph Nelson, Timothy O'Dwyer, Rory Oyang, James Pascadlo, Jessica Peets, Emrys Pico, Luis Sarmiento Pöttgen, Ruth Schuster, Philip Sellgren, Chris Tompkins, Lauren Toro, Natalia Tran, Nhan Vami, Tamas Wallin, Erik Wang, Yuxuan Whitbeck, Andrew Wilmot, Duncan Xu, Xinyi Zhang, Danyi |
| author_facet | LDMX Collaboration Åkesson, Torsten Berzin, Elizabeth Bravo, Cameron Brennan, Liam Bryngemark, Lene Kristian Butti, Pierfrancesco Delzanno, Filippo Dukes, E. Craig Dutta, Valentina Echenard, Bertrand Ehrlich, Ralf Eichlersmith, Thomas Elén, Einar Furmanski, Andrew Gomez, Victor Graham, Matt Grieco, Chiara Group, Craig Herde, Hannah Herwig, Christian Hitlin, David G. Horoho, Tyler Incandela, Joseph Jay, Nathan Jige, Asahi Ketchum, Wesley Krnjaic, Gordan Li, Amina Ma, Zihan Mans, Jeremiah Suarez, Cristina Mantilla Masanam, Sanjit Masterson, Phillip Metallo, Steven Middleton, Sophie Muse, Joseph Nelson, Timothy O'Dwyer, Rory Oyang, James Pascadlo, Jessica Peets, Emrys Pico, Luis Sarmiento Pöttgen, Ruth Schuster, Philip Sellgren, Chris Tompkins, Lauren Toro, Natalia Tran, Nhan Vami, Tamas Wallin, Erik Wang, Yuxuan Whitbeck, Andrew Wilmot, Duncan Xu, Xinyi Zhang, Danyi |
| contents | The Light Dark Matter eXperiment (LDMX) is proposed to employ a thin tungsten target and a multi-GeV electron beam to carry out a missing momentum search for the production of dark matter candidate particles. We study the sensitivity for a complementary missing-energy-based search using the LDMX Electromagnetic Calorimeter as an active target with a focus on early running. In this context, we construct an event selection from a limited set of variables that projects sensitivity into previously-unexplored regions of light dark matter phase space -- down to an effective dark photon interaction strength $y$ of approximately $2\times10^{-13}$ ($5\times10^{-12}$) for a 1MeV (10MeV) dark matter candidate mass. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_08121 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Sensitivity of an Early Dark Matter Search using the Electromagnetic Calorimeter as a Target for the Light Dark Matter eXperiment LDMX Collaboration Åkesson, Torsten Berzin, Elizabeth Bravo, Cameron Brennan, Liam Bryngemark, Lene Kristian Butti, Pierfrancesco Delzanno, Filippo Dukes, E. Craig Dutta, Valentina Echenard, Bertrand Ehrlich, Ralf Eichlersmith, Thomas Elén, Einar Furmanski, Andrew Gomez, Victor Graham, Matt Grieco, Chiara Group, Craig Herde, Hannah Herwig, Christian Hitlin, David G. Horoho, Tyler Incandela, Joseph Jay, Nathan Jige, Asahi Ketchum, Wesley Krnjaic, Gordan Li, Amina Ma, Zihan Mans, Jeremiah Suarez, Cristina Mantilla Masanam, Sanjit Masterson, Phillip Metallo, Steven Middleton, Sophie Muse, Joseph Nelson, Timothy O'Dwyer, Rory Oyang, James Pascadlo, Jessica Peets, Emrys Pico, Luis Sarmiento Pöttgen, Ruth Schuster, Philip Sellgren, Chris Tompkins, Lauren Toro, Natalia Tran, Nhan Vami, Tamas Wallin, Erik Wang, Yuxuan Whitbeck, Andrew Wilmot, Duncan Xu, Xinyi Zhang, Danyi High Energy Physics - Experiment Instrumentation and Detectors The Light Dark Matter eXperiment (LDMX) is proposed to employ a thin tungsten target and a multi-GeV electron beam to carry out a missing momentum search for the production of dark matter candidate particles. We study the sensitivity for a complementary missing-energy-based search using the LDMX Electromagnetic Calorimeter as an active target with a focus on early running. In this context, we construct an event selection from a limited set of variables that projects sensitivity into previously-unexplored regions of light dark matter phase space -- down to an effective dark photon interaction strength $y$ of approximately $2\times10^{-13}$ ($5\times10^{-12}$) for a 1MeV (10MeV) dark matter candidate mass. |
| title | Sensitivity of an Early Dark Matter Search using the Electromagnetic Calorimeter as a Target for the Light Dark Matter eXperiment |
| topic | High Energy Physics - Experiment Instrumentation and Detectors |
| url | https://arxiv.org/abs/2508.08121 |