Soft displaced leptons at the LHC
| Autor: | Blekman, Freya, Desai, Nishita, Filimonova, Anastasiia, Sahasransu, Abanti Ranadhir, Westhoff, Susanne |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | J. High Energ. Phys. 2020, 112 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/JHEP11(2020)112 |
| Popis: | Soft displaced leptons are representative collider signatures of compressed dark sectors with feeble couplings to the standard model. Prime targets are dark matter scenarios where co-scattering or co-annihilation sets the relic abundance upon freeze-out. At the LHC, searches for soft displaced leptons are challenged by a large background from hadron or tau lepton decays. In this article, we present an analysis tailored for displaced leptons with a low transverse momentum threshold at 20 GeV. Using a neural network, we perform a comprehensive analysis of the event kinematics, including a study of the expected detection efficiencies and backgrounds at small momenta. Our results show that weak-scale particles decaying into soft leptons with decay lengths between 1mm and 1m can be probed with LHC Run 2 data. This motivates the need for dedicated triggers that maximize the sensitivity to displaced soft leptons. Comment: 25 pages, 9 figures, 5 tables |
| Databáze: | arXiv |
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