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Preprint
Report number arXiv:2211.10920 ; LHCb-DP-2022-001 ; CERN-LHCb-DP-2022-001
Title Long-lived particle reconstruction downstream of the LHCb magnet
Author(s) LHCb Collaboration  Mostra tots els 1134 autors
Imprint 2022-11-20
Number of pages 45
Note All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/Publications/LHCbProjectPublic/LHCb-DP-2022-001.html (LHCb public pages)
Subject category hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Keywords detector ; tracker
Abstract Charged-particle trajectories are usually reconstructed with the LHCb detector using combined information from the tracking devices placed upstream and downstream of the 4 T m dipole magnet. Trajectories reconstructed using only information from the tracker downstream of the dipole magnet, which are referred to as T tracks, have not been used for physics analysis to date due to their limited momentum resolution. The challenges of the reconstruction of long-lived particles using T tracks for use in physics analyses are discussed and solutions are proposed. The feasibility and the tracking performance are studied using samples of long-lived Λ and KS0 hadrons decaying between 6.0 and 7.6 metres downstream of the proton-proton collision point, thereby traversing most of the magnetic field region and providing maximal sensitivity to magnetic and electric dipole moments. The reconstruction can be expanded below this range for use in direct searches of exotic long-lived particles. The data used in this analysis have been recorded between 2015 and 2018 and correspond to an integrated luminosity of 6 fb1. The results obtained demonstrate the possibility to further extend the fiducial volume and the physics reach of the LHCb experiment.
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Copyright/License preprint: (License: CC BY 4.0)



 


 Registre creat el 2022-11-23, darrera modificació el 2024-12-03


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