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| CMS-PAS-EXO-18-002 | ||
| Search for heavy long-lived charged particles with large ionization energy loss in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | ||
| CMS Collaboration | ||
| 27 March 2024 | ||
| Abstract: A search for heavy, long-lived, charged particles depositing large ionization within the silicon tracker is presented. This analysis uses proton-proton collision data with center of mass energy at $ \sqrt{s} = $ 13 TeV, collected in 2017 and 2018 by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 101 fb$^{-1}$. Two different approaches for the search are taken. One new method exploits the independence of the silicon pixel and silicon strips measurements, and an improved version of the mass method used in previous iterations of the analysis is further employed. No significant excess of events is observed. The results are interpreted in the context of pair production of supersymmetric particles, namely gluinos, top squarks and tau sleptons, or for Drell-Yan pair production of fourth generation ($ \tau' $) leptons with an electric charge equal to or twice the electron charge ($ e $). This search presents also for the first time an interpretation of a Z' boson decaying to two $ \tau' $ leptons having an electric charge equal to 2$ e $. The 95% confidence upper limits on the production cross section are extracted for each of these hypothetical particles. | ||
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Links:
CDS record (PDF) ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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