Long-lived particle reconstruction downstream of the LHCb magnet
Copyright policy )Long-lived particle reconstruction downstream of the LHCb magnet
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. The challenges of the reconstruction of long-lived particles with T tracks for physics use are discussed and solutions are proposed. The feasibility and the tracking performance are studied using samples of long-lived $${\Lambda }$$ Λ and $$K_S^0$$ K S 0 hadrons decaying between 6.0 and 7.6 m 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 upstream to about 2.5 m 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 $$\hbox {fb}^{-1}$$ fb - 1 . The results obtained demonstrate the possibility to further extend the decay volume and the physics reach of the LHCb experiment.
- Peking University China (People's Republic of)
- University of Genoa Italy
- University of Liverpool United Kingdom
- University of Milan Italy
- Tsinghua University China (People's Republic of)
QC770-798, Astrophysics, High Energy Physics - Experiment, Subatomär fysik, K0(S) --> pi+ pi-, High Energy Physics - Experiment (hep-ex), J/psi(3100) --> muon+ muon-, Subatomic Physics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], tracking detector, momentum resolution, info:eu-repo/classification/ddc/530, B0: hadronic decay, track data analysis, Accelerator Magnets, K0(S) --> pi+ pi-, bending magnet, QB460-466, B0 --> J/psi(3100) K0(S), J/psi(3100): leptonic decay, CERN LHC Coll, charged particle: trajectory, Lambda/b0 --> J/psi(3100) Lambda, Negative İons, 51 Physical Sciences, Lambda/b0: hadronic decay, 5107 Particle and High Energy Physics, Lambda --> p pi-, p p: scattering, K0(S): hadronic decay, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, Hadrons, J/psi(3100) --> muon+ muon-, Lambda --> p pi-, 530, Magnetic Moments, Nuclear and particle physics. Atomic energy. Radioactivity, Physics; HEP; LHC; LHCb; Particles and fields; Track data analysis; Momentum resolution; Charged particle: trajectory; Tracks; Particle identification; Tracking detector, Lambda/b0 --> J/psi(3100) Lambda, Decay; Tool; Accelerator magnets; Hadrons; Magnetic moments; Negative ions; Photons; Positive ions, Photons, B0 --> J/psi(3100) K0(S), tracks, LHC-B, magnet, Lambda: hadronic decay, 5106 Nuclear and Plasma Physics, Positive İons, particle: long-lived, particle identification, p p: colliding beams, experimental results
QC770-798, Astrophysics, High Energy Physics - Experiment, Subatomär fysik, K0(S) --> pi+ pi-, High Energy Physics - Experiment (hep-ex), J/psi(3100) --> muon+ muon-, Subatomic Physics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], tracking detector, momentum resolution, info:eu-repo/classification/ddc/530, B0: hadronic decay, track data analysis, Accelerator Magnets, K0(S) --> pi+ pi-, bending magnet, QB460-466, B0 --> J/psi(3100) K0(S), J/psi(3100): leptonic decay, CERN LHC Coll, charged particle: trajectory, Lambda/b0 --> J/psi(3100) Lambda, Negative İons, 51 Physical Sciences, Lambda/b0: hadronic decay, 5107 Particle and High Energy Physics, Lambda --> p pi-, p p: scattering, K0(S): hadronic decay, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, Hadrons, J/psi(3100) --> muon+ muon-, Lambda --> p pi-, 530, Magnetic Moments, Nuclear and particle physics. Atomic energy. Radioactivity, Physics; HEP; LHC; LHCb; Particles and fields; Track data analysis; Momentum resolution; Charged particle: trajectory; Tracks; Particle identification; Tracking detector, Lambda/b0 --> J/psi(3100) Lambda, Decay; Tool; Accelerator magnets; Hadrons; Magnetic moments; Negative ions; Photons; Positive ions, Photons, B0 --> J/psi(3100) K0(S), tracks, LHC-B, magnet, Lambda: hadronic decay, 5106 Nuclear and Plasma Physics, Positive İons, particle: long-lived, particle identification, p p: colliding beams, experimental results
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