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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/221245
Tracking of charged particles with nanosecond lifetimes at LHCb
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A method is presented to reconstruct charged particles with lifetimes between 10 ps and 10 ns, which considers a combination of their decay products and the partial tracks created by the initial charged particle. Using the Ξ− baryon as a benchmark, the method is demonstrated with simulated events and proton-proton collision data at √s = 13 TeV, corresponding to an integrated luminosity of 2.0 fb−1 collected with the LHCb detector in 2018. Significant improvements in the angular resolution and the signal purity are obtained. The method is implemented as part of the LHCb Run 3 event trigger in a set of requirements to select detached hyperons. This is the first demonstration of the applicability of this approach at the LHC, and the first to show its scaling with instantaneous luminosity.
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LHCb Collaboration, CALEFICE, Lukas, COMERMA MONTELLS, Albert, GARCIA MORENO, Paula, GARRIDO BELTRÁN, Lluís, GIOVENTÙ, Alessandra, GIRONELLA GIRONELL, Pere, GOMEZ FERNANDEZ, Sergio, GRAUGÉS POUS, Eugeni, LOBO SALVIA, Aniol, LÓPEZ HUERTAS, Albert, MANERA ESCALERO, Rafel, MARIN BENITO, Carla, MAURICIO FERRE, Joan, VAZQUEZ GOMEZ, Ricardo. Tracking of charged particles with nanosecond lifetimes at LHCb. _European Physical Journal C_. 2024. Vol. 84, núm. 7. [consulta: 1 de febrer de 2026]. ISSN: 1434-6044. [Disponible a: https://hdl.handle.net/2445/221245]