We report on recent progress and next steps in the design of the proposed MATHUSLA Long Lived Particle (LLP) detector for the HL-LHC as part of the Snowmass 2021 process. Our understanding of ...backgrounds has greatly improved, aided by detailed simulation studies, and significant R&D has been performed on designing the scintillator detectors and understanding their performance. The collaboration is on track to complete a Technical Design Report, and there are many opportunities for interested new members to contribute towards the goal of designing and constructing MATHUSLA in time for HL-LHC collisions, which would increase the sensitivity to a large variety of highly motivated LLP signals by orders of magnitude.
The MATHUSLA Test Stand Alidra, Maf; Alpigiani, Cristiano; Ball, Austin ...
arXiv.org,
09/2020
Paper, Journal Article
Odprti dostop
The rate of muons from LHC \(pp\) collisions reaching the surface above the ATLAS interaction point is measured and compared with expected rates from decays of \(W\) and \(Z\) bosons and \(b\)- and ...\(c\)-quark jets. In addition, data collected during periods without beams circulating in the LHC provide a measurement of the background from cosmic ray inelastic backscattering that is compared to simulation predictions. Data were recorded during 2018 in a 2.5 \(\times\) 2.5 \(\times\) 6.5~\(\rm{m}^3\) active volume MATHUSLA test stand detector unit consisting of two scintillator planes, one at the top and one at the bottom, which defined the trigger, and six layers of RPCs between them, grouped into three \((x,y)\)-measuring layers separated by 1.74 m from each other. Triggers selecting both upward-going tracks and downward-going tracks were used.
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