{Lambda}_c^{+} polarimetry using the dominant hadronic mode

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doi:10.1007/jhep07(2023)228

Abstract

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}_c^{+} → pK−π+ 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}_c^{+} baryon and eases inclusion of the {Lambda}_c^{+} → pK−π+ decay mode in hadronic amplitude analyses.

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