Determining the lifetime of long-lived particles at the LHC

Abstract : We examine the capacity of the Large Hadron Collider to determine the mean proper lifetime of long-lived particles assuming different decay final states. We employ model-dependent and model-independent methods in order to reconstruct the proper lifetime of neutral long-lived particles decaying into displaced leptons or jets, potentially accompanied by missing energy, as well as charged long-lived particles decaying into leptons and missing energy. After a generic discussion, we illustrate and discuss these methods using several new physics models. We conclude that the lifetime can indeed be reconstructed in many concrete cases. Finally, we discuss to which extent including timing information can improve such an analysis.
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Submitted on : Wednesday, January 8, 2020 - 3:28:47 PM
Last modification on : Tuesday, January 21, 2020 - 9:42:58 PM

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Shankha Banerjee, Biplob Bhattacherjee, Andreas Goudelis, Björn Herrmann, Dipan Sengupta, et al.. Determining the lifetime of long-lived particles at the LHC. 2020. ⟨hal-02432645⟩



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