An amplitude analysis of the Ξ+c → pK−π+ decay together with a measurement of the Ξ+c polarization vector in semileptonic beauty-hadron decays is presented. The analysis is performed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. An amplitude model is developed and the resonance fractions as well as two- and three-body decay parameters are reported. A sizeable Ξ+c polarization is found. A large sensitivity of the Ξ+c → pK−π+ decay to the polarization is seen, making the amplitude model suitable for Ξ+c polarization measurements in other systems.

Amplitude analysis of the Ξ⁺c → pK⁻ π⁺ decay and Ξ⁺c baryon polarization measurement in semileptonic beauty-hadron decays / R. Aaij, A. . .A.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 112:9(2025), pp. 092003.1-092003.23. [10.1103/gcft-fgp1]

Amplitude analysis of the Ξ⁺c → pK⁻ π⁺ decay and Ξ⁺c baryon polarization measurement in semileptonic beauty-hadron decays

S. Cesare;C. Mancuso;D. Marangotto;A. Merli;N. Neri;G. Tonani;Z. Wang;
2025

Abstract

An amplitude analysis of the Ξ+c → pK−π+ decay together with a measurement of the Ξ+c polarization vector in semileptonic beauty-hadron decays is presented. The analysis is performed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. An amplitude model is developed and the resonance fractions as well as two- and three-body decay parameters are reported. A sizeable Ξ+c polarization is found. A large sensitivity of the Ξ+c → pK−π+ decay to the polarization is seen, making the amplitude model suitable for Ξ+c polarization measurements in other systems.
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
   European Particle physics Latin American NETwork
   EPLANET
   European Commission
   SEVENTH FRAMEWORK PROGRAMME - SP3-People - Marie-Curie Actions
   246806
2025
7-nov-2025
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1251859
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