Conceptual Design Report for the MATHUSLA Long-Lived Particle Detector near CMS
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2025
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| author | Aitken, Branden Alpigiani, Cristiano Arteaga-Velázquez, Juan Carlos Baker, Mitchel Balazs, Kincso Barron, Jared Batell, Brian Batz, Austin Benhammou, Yan Bud, Tamara Alice Caballero-Mora, Karen Salomé Chou, John Paul Curtin, David de Roeck, Albert Diamond, Miriam Didenko, Mariia Dienes, Keith R. Dougherty, William Dougherty, Liam Andrew Drewes, Marco Erramilli, Sameer Etzion, Erez Téllez, Arturo Fernández Finlayson, Grace Fischer, Oliver Freeman, Jim Gall, Jonathan Garabaglu, Ali Gomber, Bhawna Greenberg, Stephen Elliott Grewal, Jaipratap Singh Hallman, Zoe Hassan, Bahgat Heng, Yuekun Humphrey, Keegan Humphrey, Trystan Kribs, Graham D. Lau, Alex Liao, Jiahao Liu, Zhen Marsella, Giovanni McCullough, Matthew McKeen, David Meade, Patrick Miller, Caleb Mizrachi, Gilad Morales-Olivares, O. G. Morrissey, David Morsy, Abdulrahman Ahmed Osborn, John Owh, Gabriel Panagiotou, Michalis Proffitt, Mason Ren, Runze Robertson, Steven H. Rodríguez-Cahuantzi, Mario Russell, Heather Sánchez, Victoria Saka, Halil Samra, Mamoksh Schnarr, Rodney Shelton, Jessie Silver, Yiftah Stolarski, Daniel Vasquez, Martin A. Subieta Swain, Sanjay Kumar Thayil, Steffie Ann Thomas, Brooks Torro, Emma Tsai, Yuhsin Winnicky-Lewis, Bennett Zolkin, Igor Zurita, Jose |
| author_facet | Aitken, Branden Alpigiani, Cristiano Arteaga-Velázquez, Juan Carlos Baker, Mitchel Balazs, Kincso Barron, Jared Batell, Brian Batz, Austin Benhammou, Yan Bud, Tamara Alice Caballero-Mora, Karen Salomé Chou, John Paul Curtin, David de Roeck, Albert Diamond, Miriam Didenko, Mariia Dienes, Keith R. Dougherty, William Dougherty, Liam Andrew Drewes, Marco Erramilli, Sameer Etzion, Erez Téllez, Arturo Fernández Finlayson, Grace Fischer, Oliver Freeman, Jim Gall, Jonathan Garabaglu, Ali Gomber, Bhawna Greenberg, Stephen Elliott Grewal, Jaipratap Singh Hallman, Zoe Hassan, Bahgat Heng, Yuekun Humphrey, Keegan Humphrey, Trystan Kribs, Graham D. Lau, Alex Liao, Jiahao Liu, Zhen Marsella, Giovanni McCullough, Matthew McKeen, David Meade, Patrick Miller, Caleb Mizrachi, Gilad Morales-Olivares, O. G. Morrissey, David Morsy, Abdulrahman Ahmed Osborn, John Owh, Gabriel Panagiotou, Michalis Proffitt, Mason Ren, Runze Robertson, Steven H. Rodríguez-Cahuantzi, Mario Russell, Heather Sánchez, Victoria Saka, Halil Samra, Mamoksh Schnarr, Rodney Shelton, Jessie Silver, Yiftah Stolarski, Daniel Vasquez, Martin A. Subieta Swain, Sanjay Kumar Thayil, Steffie Ann Thomas, Brooks Torro, Emma Tsai, Yuhsin Winnicky-Lewis, Bennett Zolkin, Igor Zurita, Jose |
| contents | We present the Conceptual Design Report (CDR) for the MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles) long-lived particle detector at the HL-LHC, covering the design, fabrication and installation at CERN Point 5. MATHUSLA is a 40 m-scale detector with an air-filled decay volume that is instrumented with scintillator tracking detectors, to be located near CMS. Its large size, close proximity to the CMS interaction point and about 100 m of rock shielding from HL-LHC backgrounds allows it to detect LLP production rates and lifetimes that are one to two orders of magnitude beyond the ultimate sensitivity of the HL-LHC main detectors for many highly motivated LLP signals. Data taking is projected to commence with the start of HL-LHC operations. We present a new 40m design for the detector: its individual scintillator bars and wavelength-shifting fibers, their organization into tracking layers, tracking modules, tower modules and the veto detector; define a high-level design for the supporting electronics, DAQ and trigger system, including supplying a hardware trigger signal to CMS to record the LLP production event; outline computing systems, civil engineering and safety considerations; and present preliminary cost estimates and timelines for the project. We also conduct detailed simulation studies of the important cosmic ray and HL-LHC muon backgrounds, implementing full track/vertex reconstruction and background rejection, to ultimately demonstrate high signal efficiency and $\ll 1$ background event in realistic LLP searches for the main physics targets at MATHUSLA. This sensitivity is robust with respect to detector design or background simulation details. Appendices provide various supplemental information. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_20893 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Conceptual Design Report for the MATHUSLA Long-Lived Particle Detector near CMS Aitken, Branden Alpigiani, Cristiano Arteaga-Velázquez, Juan Carlos Baker, Mitchel Balazs, Kincso Barron, Jared Batell, Brian Batz, Austin Benhammou, Yan Bud, Tamara Alice Caballero-Mora, Karen Salomé Chou, John Paul Curtin, David de Roeck, Albert Diamond, Miriam Didenko, Mariia Dienes, Keith R. Dougherty, William Dougherty, Liam Andrew Drewes, Marco Erramilli, Sameer Etzion, Erez Téllez, Arturo Fernández Finlayson, Grace Fischer, Oliver Freeman, Jim Gall, Jonathan Garabaglu, Ali Gomber, Bhawna Greenberg, Stephen Elliott Grewal, Jaipratap Singh Hallman, Zoe Hassan, Bahgat Heng, Yuekun Humphrey, Keegan Humphrey, Trystan Kribs, Graham D. Lau, Alex Liao, Jiahao Liu, Zhen Marsella, Giovanni McCullough, Matthew McKeen, David Meade, Patrick Miller, Caleb Mizrachi, Gilad Morales-Olivares, O. G. Morrissey, David Morsy, Abdulrahman Ahmed Osborn, John Owh, Gabriel Panagiotou, Michalis Proffitt, Mason Ren, Runze Robertson, Steven H. Rodríguez-Cahuantzi, Mario Russell, Heather Sánchez, Victoria Saka, Halil Samra, Mamoksh Schnarr, Rodney Shelton, Jessie Silver, Yiftah Stolarski, Daniel Vasquez, Martin A. Subieta Swain, Sanjay Kumar Thayil, Steffie Ann Thomas, Brooks Torro, Emma Tsai, Yuhsin Winnicky-Lewis, Bennett Zolkin, Igor Zurita, Jose Instrumentation and Detectors High Energy Physics - Experiment High Energy Physics - Phenomenology We present the Conceptual Design Report (CDR) for the MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles) long-lived particle detector at the HL-LHC, covering the design, fabrication and installation at CERN Point 5. MATHUSLA is a 40 m-scale detector with an air-filled decay volume that is instrumented with scintillator tracking detectors, to be located near CMS. Its large size, close proximity to the CMS interaction point and about 100 m of rock shielding from HL-LHC backgrounds allows it to detect LLP production rates and lifetimes that are one to two orders of magnitude beyond the ultimate sensitivity of the HL-LHC main detectors for many highly motivated LLP signals. Data taking is projected to commence with the start of HL-LHC operations. We present a new 40m design for the detector: its individual scintillator bars and wavelength-shifting fibers, their organization into tracking layers, tracking modules, tower modules and the veto detector; define a high-level design for the supporting electronics, DAQ and trigger system, including supplying a hardware trigger signal to CMS to record the LLP production event; outline computing systems, civil engineering and safety considerations; and present preliminary cost estimates and timelines for the project. We also conduct detailed simulation studies of the important cosmic ray and HL-LHC muon backgrounds, implementing full track/vertex reconstruction and background rejection, to ultimately demonstrate high signal efficiency and $\ll 1$ background event in realistic LLP searches for the main physics targets at MATHUSLA. This sensitivity is robust with respect to detector design or background simulation details. Appendices provide various supplemental information. |
| title | Conceptual Design Report for the MATHUSLA Long-Lived Particle Detector near CMS |
| topic | Instrumentation and Detectors High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.20893 |