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

An amplitude analysis of Λ+c→pK−π+ 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 am...

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Main Authors: Aaij, Roel (Author) , Archilli, Flavio (Author) , Bachmann, Sebastian (Author) , Borsato, Martino (Author) , Caspary, Rowina (Author) , Frau, Giulia (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Hu, Jiangqiao (Author) , Leverington, Blake (Author) , Li, Peilian (Author) , Marks, Jörg (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Witola, Lukas (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 28 July 2023
In: Physical review
Year: 2023, Volume: 108, Pages: 1-27
ISSN:2470-0029
DOI:10.1103/PhysRevD.108.012023
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.108.012023
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.108.012023
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Author Notes:R. Aaij et al. (LHCb Collaboration)*
Description
Summary:An amplitude analysis of Λ+c→pK−π+ 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→pK−π+ decay to the polarization is seen, making the amplitude model suitable for Λ+c polarization measurements in other systems.
Item Description:*LHCb Collaboration: R. Aaij, F. Archilli, S. Bachmann, M. Borsato, R. Caspary, G. Frau, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, B. Leverington, P. Li, J. Marks, D.J. Unverzagt, U. Uwer, L. Witola, A. Zhelezov [und 997 Personen]
Im Titel sind die Zeichen + und - hochgestellt und der Buchstabe c tiefgestellt
Gesehen am 13.02.2024
Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.108.012023

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