Amplitude analysis of the Λ+c→pKπ+ decay and Λ+c baryon polarization measurement in semileptonic beauty hadron decays

LHCb Collaboration

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Abstract

An amplitude analysis of Λ+c→pKπ+ decays together with a measurement of the Λ+c polarization vector in semiōleptonic beauty hadron decays is presented. A sample of 400 000 candidates is selected from proton-proton collisions recorded by the LHCb detector at a center-of-mass energy of 13 TeV. An amplitude model is developed and the resonance fractions as well as two- and three-body decay parameters are reported. The mass and width of the Λ(2000) state are also determined. A significant Λ+c polarization is found. A large sensitivity of the Λ+c→pKπ+ decay to the polarization is seen, making the amplitude model suitable for Λ+c polarization measurements in other systems.
Original languageEnglish
Article number012023
Number of pages27
JournalPhys. Rev. D
Volume108
Issue number1
DOIs
Publication statusPublished - 1 Jul 2023

Bibliographical note

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-002.html

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