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.
Λc+ polarimetry using the dominant hadronic mode / R. Aaij, A.S.W.A.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2023:7(2023 Jul 31), pp. 228.1-228.26. [10.1007/JHEP07(2023)228]
Λc+ polarimetry using the dominant hadronic mode
M. Lazzaroni;C. Mancuso;D. Marangotto;A. Merli;N. Neri;E. Spadaro Norella;G. Tonani;
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.| File | Dimensione | Formato | |
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