An amplitude analysis of A+c - pK- \& pi;+ decays together with a measurement of the A+c polarization vector in semiOleptonic 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 Ao2000 thorn state are also determined. A significant A+c polarization is found. A large sensitivity of the A+c - pK-\& pi;+ decay to the polarization is seen, making the amplitude model suitable for A+c polarization measurements in other systems.
Amplitude analysis of the ?c+- pK-p+ decay and ?c+ baryon polarization measurement in semileptonic beauty hadron decays
Cardinale, R.;Petrolini, A.;Sergi, A.;
2023-01-01
Abstract
An amplitude analysis of A+c - pK- \& pi;+ decays together with a measurement of the A+c polarization vector in semiOleptonic 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 Ao2000 thorn state are also determined. A significant A+c polarization is found. A large sensitivity of the A+c - pK-\& pi;+ decay to the polarization is seen, making the amplitude model suitable for A+c polarization measurements in other systems.
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