Polarimetry in Λc⁺ → p K⁻ π⁺#
The polarimeter vector field for multibody decays of a spin-half baryon is introduced as a generalisation of the baryon asymmetry parameters. Using a recent amplitude analysis of the \(\Lambda^+_\mathrm{c} \to p K^- \pi^+\) decay performed at the LHCb experiment, we compute the distribution of the kinematic-dependent polarimeter vector for this process in the space of Mandelstam variables to express the polarised decay rate in a model-agnostic form. The obtained representation can facilitate polarisation measurements of the \(\Lambda^+_\mathrm{c}\) baryon and eases inclusion of the \(\Lambda^+_\mathrm{c} \to p K^- \pi^+\) decay mode in hadronic amplitude analyses.
This website shows all analysis results that led to the publication of LHCb-PAPER-2022-044. More information on this publication can be found on the following pages:
Publication on JHEP: J. High Energ. Phys. 2023, 228 (2023)
Publication on arXiv: arXiv:2301.07010
Record on CDS: cds.cern.ch/record/2838694
Record for the source code on Zenodo: 10.5281/zenodo.7544989
Archived documentation on GitLab Pages: lc2pkpi-polarimetry.docs.cern.ch
Archived repository on CERN GitLab: gitlab.cern.ch/polarimetry/Lc2pKpi
Active repository on GitHub containing discussions: github.com/ComPWA/polarimetry
Behind SSO login (LHCb members only)
LHCb TWiki page: twiki.cern.ch/twiki/bin/viewauth/LHCbPhysics/PolarimetryLc2pKpi
Charm WG meeting: indico.cern.ch/event/1187317
RC approval presentation: indico.cern.ch/event/1213570
Silent approval to submit: indico.cern.ch/event/1242323
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Several cross-checks with Julia can be found here.
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Figures for the paper can be downloaded here:
- Figure 2
- Figure 3a
- Figure 3b
- Figure 4
All other exported figures can be found here.
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