An amplitude analysis of the decay Λb0→ D0pπ−is performed in the part of the phase space containing resonances in the D0p channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb−1of pp collisions recorded by the LHCb experiment. The spectrum of excited Λc+states that decay into D0p is studied. The masses, widths and quantum numbers of the Λc(2880)+and Λc(2940)+resonances are measured. The constraints on the spin and parity for the Λc(2940)+state are obtained for the first time. A near-threshold enhancement in the D0p amplitude is investigated and found to be consistent with a new resonance, denoted the Λc(2860)+, of spin 3/2 and positive parity.

Study of the D0p amplitude in Λb 0 → D 0 pπ − decays

De Serio, M.;Pappagallo, M.;Simone, S.;
2017-01-01

Abstract

An amplitude analysis of the decay Λb0→ D0pπ−is performed in the part of the phase space containing resonances in the D0p channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb−1of pp collisions recorded by the LHCb experiment. The spectrum of excited Λc+states that decay into D0p is studied. The masses, widths and quantum numbers of the Λc(2880)+and Λc(2940)+resonances are measured. The constraints on the spin and parity for the Λc(2940)+state are obtained for the first time. A near-threshold enhancement in the D0p amplitude is investigated and found to be consistent with a new resonance, denoted the Λc(2860)+, of spin 3/2 and positive parity.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/215708
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