2018/12/05 by M. Moulson, Matthew Moulson, Moulson, Matthew · 2 citations
Physics and Astronomy · #Bar (unit) #Computer science #Database #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Instrumentation and Detectors (physics.ins-det) #Large Hadron Collider #Measure (data warehouse) #Meteorology #Nuclear physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex #physics.ins-det
paper · pdf · doi:10.48550/arxiv.1812.01896
5 pages, 2 figures. Prepared for the Proceedings of the 39th International Conference on High Energy Physics (ICHEP2018), 4-11 July, 2018, Seoul, Korea
arxiv created 2018/12/05 · openalex publication_date 2018/12/05 · arxiv updated 2018/12/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Precise measurements of the branching ratios for the flavor-changing neutral current decays K→πνν can provide unique constraints on CKM unitarity and, potentially, evidence for new physics. It is important to measure both decay modes, K+→π+νν and KL→π0νν, since different new physics models affect the rates for each channel differently. The NA62 experiment at the CERN SPS will measure the BR for the charged channel to better than 20%. The BR for the neutral channel has never been measured. We are designing the KLEVER experiment to measure BR(KL→π0νν) to ∼20% using a high-energy neutral beam at the CERN SPS. The boost from the high-energy beam facilitates the rejection of background channels such as KL→π0π0 by detection of the additional photons in the final state. On the other hand, the layout poses particular challenges for the design of the small-angle vetoes, which must reject photons from KL decays escaping through the beam exit amid an intense background from soft photons and neutrons in the beam. We present findings from our design studies, with an emphasis on the challenges faced and the potential sensitivity for the measurement of BR(KL→π0νν).