The diferential branching fraction and angular coefcients of Λ 0 b → pK−µ +µ − decays are measured in bins of the dimuon mass squared and dihadron mass. The analysis is performed using a data set corresponding to 9 fb−1 of integrated luminosity collected with the LHCb detector between 2011 and 2018. The data are consistent with receiving contributions from a mixture of Λ resonances with diferent spin-parity quantum numbers. The angular coefcients show a pattern of vector-axial vector interference that is a characteristic of the type of favour-changing neutral-current transition relevant for these decays.
Analysis of $$ {\Lambda}_b^0 $$ → pK−μ+μ− decays
De Angelis, C.;Dettori, F.;Fabiano, F.;Manca, G.;Oldeman, R.;Provenzano, D.;Saitta, B.;
2024-01-01
Abstract
The diferential branching fraction and angular coefcients of Λ 0 b → pK−µ +µ − decays are measured in bins of the dimuon mass squared and dihadron mass. The analysis is performed using a data set corresponding to 9 fb−1 of integrated luminosity collected with the LHCb detector between 2011 and 2018. The data are consistent with receiving contributions from a mixture of Λ resonances with diferent spin-parity quantum numbers. The angular coefcients show a pattern of vector-axial vector interference that is a characteristic of the type of favour-changing neutral-current transition relevant for these decays.File in questo prodotto:
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