Exploring the lifetime frontier: the MATHUSLA detector proposal

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• Cristiano Alpigiani (University of Washington)
• Tuesday 26 April 2022, 16:00-17:00
• Ryle Seminar Room.

If you have a question about this talk, please contact William Fawcett.

The observation of neutral long-lived particles at the LHC would reveal physics beyond the Standard Model and could account for the many open issues in our understanding of our universe. Long-lived particle signatures are well motivated and can appear in many theoretical constructs that address the Hierarchy Problem, Dark Matter, Neutrino Masses, and the Baryon Asymmetry of the Universe. With the current experiments at the particle accelerators, no search strategy will be able to observe the decay of neutral long-lived particles with masses above ∼GeV and lifetimes at the limit set by Big Bang Nucleosynthesis (BBN), c*tau~10⁷⁻¹⁰8 m. The MATHUSLA detector concept (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles) will be presented. It can be implemented on the surface above the CMS detector in time for the high-luminosity LHC operations to search for neutral long-lived particles with lifetimes up to the BBN limit. The large area of the detector allows MATHUSLA to make important contributions also to cosmic-ray physics. I will describe the basic detector concept and layout, the current status of the project, the ongoing R&D and background studies, as well as the future plans. I will also report on the analysis of data collected by the test stand installed on the surface above the ATLAS detector in 2018.

This talk is part of the Cavendish HEP Seminars series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Cavendish HEP Seminars
• Centre for Health Leadership and Enterprise
• Featured lists
• ME Seminar
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• Ryle Seminar Room
• School of Physical Sciences
• Thin Film Magnetic Talks
• few29

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