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 Λc+ → 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 Λc+ baryon and eases inclusion of the Λc+ → pK − π + decay mode in hadronic amplitude analyses. [Figure not available: see fulltext.].

Λc+ polarimetry using the dominant hadronic mode

Bassi G.
Membro del Collaboration Group
;
Kleijne N.
Membro del Collaboration Group
;
Lusiani A.
Membro del Collaboration Group
;
Morello M. J.
Membro del Collaboration Group
;
Pica L.
Membro del Collaboration Group
;
Ribatti R.
Membro del Collaboration Group
;
2023

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 Λc+ → 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 Λc+ baryon and eases inclusion of the Λc+ → pK − π + decay mode in hadronic amplitude analyses. [Figure not available: see fulltext.].
2023
Settore FIS/01 - Fisica Sperimentale
Charm Physics; Flavour Physics; Hadron-Hadron Scattering; Polarization
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/139972
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