An amplitude analysis of Λ + c → p K − 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 → p K − π + decay to the polarization is seen, making the amplitude model suitable for Λ + c polarization measurements in other systems.

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

Brundu, D.;Dettori, F.;Litvinov, R.;Manca, G.;Oldeman, R.;Saitta, B.;Sun, J.;
2023-01-01

Abstract

An amplitude analysis of Λ + c → p K − 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 → p K − π + decay to the polarization is seen, making the amplitude model suitable for Λ + c polarization measurements in other systems.
File in questo prodotto:
File Dimensione Formato  
PhysRevD.108.012023.pdf

accesso aperto

Descrizione: Articolo principale
Tipologia: versione editoriale
Dimensione 17.68 MB
Formato Adobe PDF
17.68 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/386335
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 3
social impact