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Determining the lifetime of long-lived particles at the HL-LHC

Banerjee, Shankha; Bhattacherjee, Biplob; Goudelis, Andreas; Herrmann, Björn; Sengupta, Dipan; Sengupta, Rhitaja

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Authors

Shankha Banerjee

Biplob Bhattacherjee

Andreas Goudelis

Björn Herrmann

Dipan Sengupta

Rhitaja Sengupta



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 mostly concentrate on the high luminosity runs of the LHC, and therefore, develop our discussion in light of the high amount of pile-up and the various upgrades for the HL-LHC runs. We employ model-dependent and model-independent methods in order to reconstruct the proper lifetime of neutral long-lived particles decaying into displaced leptons, potentially accompanied by missing energy, as well as charged long-lived particles decaying ihnto leptons and missing energy. We also present a discussion for lifetime estimation of neutral long-lived particles decaying into displaced jets, along with the challenges in the high PU environment of HL-LHC. After a general 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, which is an important addition in the Phase-II upgrade of CMS, can improve such an analysis.

Citation

Banerjee, S., Bhattacherjee, B., Goudelis, A., Herrmann, B., Sengupta, D., & Sengupta, R. (2021). Determining the lifetime of long-lived particles at the HL-LHC. The European Physical Journal C, 81(2), Article 172. https://doi.org/10.1140/epjc/s10052-021-08945-9

Journal Article Type Article
Acceptance Date Feb 2, 2021
Online Publication Date Feb 19, 2021
Publication Date 2021
Deposit Date Sep 21, 2021
Publicly Available Date Sep 21, 2021
Journal The European Physical Journal C
Print ISSN 1434-6044
Electronic ISSN 1434-6052
Publisher SpringerOpen
Peer Reviewed Peer Reviewed
Volume 81
Issue 2
Article Number 172
DOI https://doi.org/10.1140/epjc/s10052-021-08945-9
Public URL https://durham-repository.worktribe.com/output/1240609

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.






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