An amplitude analysis of the decay Lambda(0)(b) -> D(0)p pi(-) is performed in the part of the phase space containing resonances in the D(0)p channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb(-1) of pp collisions recorded by the LHCb experiment. The spectrum of excited Lambda(+)(c) states that decay into D(0)p is studied. The masses widths, quantum numbers of the Lambda(c)(2880)(+), Lambda(c) (2940)(+) resonances are measured. The constraints on the spin, parity for the Lambda(c)(2940)(+) state are obtained for the first time. A near-threshold enhancement in the D(0)p amplitude is investigated, found to be consistent with a new resonance denoted the Lambda(c) (2860)(+) of spin 3/2, positive parity.

Study of the D(0)p amplitude in Lambda(0)(b) -> D(0)p pi(-) decays

Bonivento W.;Dettori F.;Manca G.;Oldeman R.;Saitta B.;
2017-01-01

Abstract

An amplitude analysis of the decay Lambda(0)(b) -> D(0)p pi(-) is performed in the part of the phase space containing resonances in the D(0)p channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb(-1) of pp collisions recorded by the LHCb experiment. The spectrum of excited Lambda(+)(c) states that decay into D(0)p is studied. The masses widths, quantum numbers of the Lambda(c)(2880)(+), Lambda(c) (2940)(+) resonances are measured. The constraints on the spin, parity for the Lambda(c)(2940)(+) state are obtained for the first time. A near-threshold enhancement in the D(0)p amplitude is investigated, found to be consistent with a new resonance denoted the Lambda(c) (2860)(+) of spin 3/2, positive parity.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/240147
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