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School of Physics and Astronomy

Exploring the lifetime frontier: the MATHUSLA detector proposal

12 December 2019

Time: 3:00 - 4:00pm
Speaker: Cristiano Alpigiani
Venue: G.O Jones 410

Abstract:

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~10^7−10^8 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 on-going 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.

Sllides will be linked here in due time:
https://indico.ph.qmul.ac.uk/indico/conferenceDisplay.py?confId=578