Speaker
Description
Long-Lived Particles (LLPs) beyond the Standard Model appear in many
theoretical frameworks that address fundamental questions such as the
hierarchy problem, dark matter, neutrino masses, and the baryon
asymmetry of the universe. The LHC may in fact be producing copious
numbers of neutral LLPs with masses above a GeV, only to have these
sneaky particles escape the main detectors without being spotted. To
fill this gap, we have proposed the MATHUSLA detector (MAssive Timing
Hodoscope for Ultra-Stable neutraL pArticles), which would be
constructed on the surface above CMS and would take data during
High-Luminosity LHC operations. The detector would be composed of
several layers of solid plastic scintillator, with wavelength-shifting
fibers connected to silicon photomultipliers, monitoring an empty
air-filled decay volume. In this talk, we will show a new, smaller MATHUSLA design that could be accommodated by available funding envelopes, while still providing world-leading LLP reach. We will also report on background studies for rare Standard Model processes, and the construction of "demonstrator modules" at the University of Victoria and the University of Toronto.
| Keyword-1 | particle detectors |
|---|---|
| Keyword-2 | Beyond the Standard Model |
| Keyword-3 | high-luminosity LHC |
