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.
2023
Inglese
108
1
012023
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.108.012023
Esperti anonimi
internazionale
scientifica
Aaij, R.; Abdelmotteleb, A.  S.  W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, ...espandi
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
1014
open
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