Speaker
Description
Several beyond standard model theories hypothesize the existence of long-lived particles (LLP) that have macroscopic decay lengths and thus can travel a measurable distance in the CMS detector before decaying. Displacement from a few hundred micrometers to several meters allows probing a wide range of models predicting LLP decaying to muons. To track with high precision muons that are displaced from the collision point, the CMS collaboration has developed specific objects called “displaced muons”, reconstructed without making any assumption on the position where muon track originates. Precise knowledge of the performance of displaced muons reconstruction at high levels of displacement, both for simulation and data, is a key ingredient for analyses searching for LLPs decaying into muons. Analyses in this sector are expected to benefit significantly from both the increased statistics of Run 3 and the improvements coming from the usage of displaced muon objects and triggers. This talk will motivate the need for displaced muon objects, report on updates on their performance and highlight their relevance for physics analyses, such as an inclusive search for long-lived exotic particles decaying to final states with a pair of muons.
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